ABB JokabSafety Section05 SafetyRelays

8/17/2019 ABB JokabSafety Section05 SafetyRelays

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Safety Relays

Meet existing safety standards!Supervise safety devices!Safe stops and reliable restarts!

888-282-2123 • www.jokabsafetyna.com ABB JOKAB SAFETY

Why should I

use Safety Relays? ...................................................... 5:2The Smallest andMost Flexible SafetyRelays on the Market .................................................. 5:3

Creating a ControlReliable Safety System ............................................... 5:4

Safety Relays Summary .............................................. 5:6

Safety Relays - RT Series

RT6 ........................................................................... 5:8

RT7 ........................................................................... 5:12

RT9 ........................................................................... 5:16

JSBRT11 .................................................................. 5:20Safety Relays - JSB Series

JSBR4 ...................................................................... 5:22

JSBT4....................................................................... 5:24

BT50/BT50T ............................................................. 5:26

BT51/BT51T ............................................................. 5:28

JSBT5(T) ................................................................... 5:30

Safety Timers

JSHT1 A/B ............................................................... 5:32

JSHT2 A/B/C ........................................................... 5:34

Expansion Relays

E1T ........................................................................... 5:36 JSR1T....................................................................... 5:38

JSR2A ...................................................................... 5:40

JSR3T....................................................................... 5:42

Connection Examples ................................................. 5:44

Component List andOrdering Information ................................................... 5:62

Our universal safety relays

offer various input options

for use with many different

safety devices and risk levels


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Why should I useSafety Relays?

...to meet existing safety standards!

“A fault in the hardware or the software of the control system must not lead to hazardous situations.” This

is the requirement in the EU’s Machinery Directive2006/42/EG under the heading 1.2.1 “Safety andreliability of control systems”. The directive impliesthat no person should be put at risk if for example,a relay sticks or if a transistor or two electrical con-ductors short-circuit. A safety relay will fulfill these requirements. A safety

relay has, for example, inputs that are checked forshort-circuits and dual redundant circuits that arechecked at each operation. This can be compared tothe dual brake circuits in a car. If one of the circuits isfaulty the other will stop the car. In a safety relay there is an additional function which only allows a machine

to start if both circuits are ok. The safety standard describes various safety cat-egories depending on the level of risk and applica-tion. One single universal relay with selectable safetycategories solves this.

...to supervise safety devices!

LightBeams

LightCurtains

3-PositionDevices

SafetyInterlockSwitches

2-HandDevices

EmergencyStop

Buttons

Safety Strips and

Bumpers

Safety Guard Mats

...for safe stops and reliable restarts!

Dual stop signals whenthe gate is opened...

Entering or putting ahand or limb into a haz-ardous area, must causeall machines that cancause a personal injury tostop safely. Many seriousaccidents occur when

machinery is believed tohave stopped but is infact only pausing in itsprogram sequence. Thesafety relay monitors thegate interlock switch, thecables and gives dualstop signals.

Supervised reset when there can be a person within the risk area...

Make sure that nobodyis within the restrictedarea when activating thereset button. A super-vised reset button mustbe pressed and released

before a reset can occur.Many serious accidentshave been caused by anunintentional and unsu-pervised reset.

Timed reset when youcannot see the entirerisk area...

Sometimes a doublereset function is necessaryto make sure that no oneis left behind in the riskarea. First, after ensuringno other person is inside

the hazardous area, thepre-reset button must be activated, followed by thereset button outside therisk area within an accept-able time period e.g. 10seconds. A safety timerand a safety relay can pro-vide this function.

Automatic reset for small hatches...

Where body entry is notpossible through a hatch,the safety circuit can beautomatically reset. The safety relays arereset immediately whenthe hatch interlock switch

contacts are closed.

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The Smallest and Most FlexibleSafety Relays on the Market!We have the most flexible safety relays on the market. Our first universal relay was developed nearly 20 years ago. Today the flexibility is even greater and the sizehas been reduced by 85%.

A universal relay is a safety relay with various inputoptions for various safety devices and risk levels.Internally, the safety relay is of the highest safety level(category 4 according to EN 954-1/EN ISO 13849-1). A machine supplier can therefore, with one singlesafety relay, select the input configuration that bestsuits his customer’s safety requirements. In addition,our safety relays have detachable connector blocksfor ease of replacement and testing.

As our universal relay incorporates all input options,it is compatible with all our previous safety relays aswell as with other manufacturers products. Is a universal relay expensive? No, our latest pat-

ented construction is extremely simple and the number of major components is less compared to our previ-ous universal relays. This means that our safety relaysare even more reliable and economical than before.

We also have gained a great deal of experience fromcreating safety solutions for our own systems.It would be our pleasure to share these experienceswith you! Please do not hesitate to contact us if youshould require any other safety solutions.

RT7: The most flexibleSafety Relay on the market!

Outputs for program stop, gate opened or closed

and reset indication

Some of the advantageswith JOKAB SAFETY’sSafety Relays...

■ Universal relays

■ Excellent reliability

■ Approved in Europe, USA, Canada

■ Supervised reset

■ Time reset

■ Small and compact

■ Detachable connector blocks

■ Low power consumption

Safety outputs for immediate and delayed stops at optional times

Detachableconnector

blocks

■ Permits the use of long runs of cables

■ Functions set by external hardwired links

■ LED indication and outputs for indication

■

Powerful switching capacity

Inputs for various safety devices Input for manual or automatic resetting


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Ladder Diagram of a Common

Emergency Stop CircuitIn this typical emergency stop circuit the weakestlink is relay CR1. The contacts of CR1 can weldclosed or, since this relay is spring applied, it can failmechanically. If this failure occurred, energy to the loadwould continue resulting in an UNSAFE CONDITIONthat would cause machine damage and/or personnelinjury. ANSI standards and OSHA regulations demandprevention of such a condition.

Ladder Diagram using two Force-GuidedRelays to Achieve Redundancy

According to the definition of control reliability we

need to guard against failure of CR1. It is one sourcefor a single component failure. Redundancy is notsufficient. If one of the two relays fail you are back tosquare one— with redundancy lost, the second relaycould fail on a subsequent machine cycle. We must monitor the condition of the redundant re-lays. Force or positive guided relays provide the bestsolution to accomplish monitoring.

Ladder Diagram of a Circuit usingthree Force-Guided Relays

This circuit is approaching control reliable. Usingpositive guided relays offers redundancy and cross-monitoring, but does not monitor for short circuitsor reset problems.

Where required by the appropriate ANSI standard(example clause 4.5.4 of RIA 15.06.1999), the impor-tance of using safety relays to achieve control reliablecircuits can be explained. Control Reliable Systems

must be designed “such that a single component failurewithin the system does not prevent the stoppingaction from taking place but will prevent successivesystem cycle until that failure has been corrected.”

Creating a Control Reliable Safety System

Note: Safety Category only refers to the safety relay configuration, input devices, output devices and wiring must be considered for a safety category of the system.

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Ladder Diagram using threeForce-Guided Relays

Advantages

■ Has redundancy and cross-monitoring

Disadvantages (in comparison

to the Jokab Safety Relay)■ No safety approvals

■ 38 wiring points

■ High chance of wiring errors

■ Installation is labor intensive

■ More costly

■ Larger in overall size (panel space)

■ Easy to tamper with and bypass connections

■ No short circuit protection on the inputs

■ Reset is not monitored

■ Difficult to troubleshoot

■ The more contacts needed, the

more complicated the circuit.

Wiring Diagram using a RT6 Jokab SafetyRelay connected in Input Configuration Mode 4to Achieve Control Reliability Electrically

Advantages (in comparison tothe 3 Force-Guided Relays Circuit)

■ Control reliable electrically

■ Has redundancy and cross-monitoring

■ 4 input configuration modes which are hardwireselectable (selectable category of safety)

■ 2 reset configuration modes which are hardwire selectable

■ Manual supervised reset mode monitors the button and wiring against failure

■ Input configuration modes 3 and 4 monitor all input devices and wiring against failure

■ Monitors external positive or force-guidedcontactors/relays

■ Universal (multi-purpose)

■ Retrofits easily into existing systems

■ 5 LED indicators: Power On, Input 1, Input 2,Output K1 and Output K2

■ 3 NO safety outputs, 1 NC monitoring output

■ 2 transistor outputs for input status and output status

■ Available in a variety of source voltages

■ Terminal strips are removable for easy change

■ 17 wiring points

■ Cost effective

■ Compact in size (45 mm in width)

■ Several safety approvals

Note: Safety Category only refers to the safety relay configuration, input devices, output devices and wiring must be considered for a safety category of the system.


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Interlocking Switch/Gate/HatchLight Curtains

Light Beams

Safety Mats

Contact Strips

Two-Hand Control Device

Emergency Stop

Hold to Run/Enabling Device

Foot Control Device

Area Supervision

Time ResettingTime Bypassing

Inching

Output Expansion

Delayed Output

R T 6

R T 7

R T 9

J S B R T 1 1

J S B R 4

J S B T 4

J S B T 5 T / B T 5 0 T / B T 5 1 T

J S B T 5 / B T 5 0 / B T 5 1

J S H T 1 A / B

J S H T 2 A / B / C

E 1 T

J S R 1 T

J S R 2 A

J S R 3 T

Application Fields Safety Safety Expansion Relays Timers Relays

First of all, we recommend the selection of one of ourlatest universal relays in the RT-series. These are bothpractical and cost effective. To facilitate the choice ofsafety relay or combinations of safety relays, please see:

• the table below dividing the safety relaysinto application fields

• the table on the opposite page showing possibleinput and output options

Safety Relays Summary

Which Safety Relay should you choose?• the relevant data sheet giving comprehensive

information about each specific safety relay

• the circuit diagram for various applications are

located in "Connection Examples’" beginning on

page 5:44

Note: All earlier type of relays that can now be replaced by those in this manual are still kept as stock items and can be suppliedupon request.

Input AlternativesSingle-Channel,1 NO from +24V

Safety Category 1The input must be closedbefore the outputs canbe activated. A stop signalis given when the input isopened.

Two-channel,2 NO from +24V

Safety Category 3Both the inputs must be closedbefore the outputs can be activated. A stop signal is given if one or both ofthe inputs are opened. Both the inputsmust be opened and reclosed beforethe outputs can be reactivated. A short- circuit between the inputs is not moni-tored by the safety relay. Category 4can only be achieved if a safety devicewith short circuit monitored outputs isconnected.

Two-Channel,1 NO & 1 NC

from +24 VSafety Category 4

One input must be closed and onemust be opened before the outputscan be activated. A stop signal is givenif one or both of the inputs changeposition or if the inputs short-circuit.Both inputs must be put into their ini-tial position before the outputs can bereactivated.

Two-Channel,1 NO from 0 V &

1 NO from +24 VSafety Category 4

Both the inputs must be closed before theoutputs can be activated. A stop signalis given if one or both of the inputs areopened. Both the inputs must be openedand reclosed before the outputs can be re-activated. Stop signal is given if there is ashort-circuit between the inputs.

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Technical Data Safety Safety Expansion Relays Timers Relays* indicates the possibility of selecting delayed outputs indicates one relay contact per output

(other relays having two contacts per output)‡ delayed

º category 4 depending on connection (when used asexpansion relay with Pluto Safety PLC, then category 4)

† fixed 0.5 s delay R T 6

R T 7

R T 9

J S B R T 1 1

J S B R 4

J S B T 4

J S B T 5 T

B T 5 0 T

B T 5 1 T

B T 5 0

B T 5 1

J S H T 1 A / B

J S H T 2 A / B / C

E 1 T

J S R 1 T

J S R 2 A

J S R 3 T

Note: If serial contacts are connected to the input, the Safety Category is made lower for two-channel connections. Safety Category only refers to the safety relay configuration. Input devices, output devices and wiring must be considered for a safety category of the system.

Safety Category 1-4 1-4 1-4 1-4 4 4 1-4º 1-4º 1-4º 1-4º 1-4º 1-4 1-4 1-4 1-4 1-4 1-4Safety Input

Single-Channel, 1 NO from +24 V

Two-Channel, 2 NO from +24 V

Two-Channel, 1 NO & 1 NC from +24 V

Two-Channel, 1 NO from 0 V & 1 NO from + 24 V

Contact Strips/Safety Mats

Reset & Test Input

Monitored Manual

Automatic/Unmonitored Manual

Testing of Contactors, Relays, Valves, etc.

OutputNO 3 2 2 7 3 3 3 4 4* 4* 4

NO Delayed 2 3† 3 4 4* 4* 2

NO Impulse Outputs 2 2

NC 1 1 2 1 1 1 1* 1

NC Delayed 1† 1 1*

Information Output 2 3 1 1 1

Switching Capacity (Resistive Load)

6A/250VAC/1500VA/150W 4 3 2 9 4 4 4 4‡ 4‡ 4 4 4 5

4A/250VAC/1000VA/100W 2 2 2

6A/250VAC/1380VA/138W 2‡

10A/250VAC/1840VA/192W 5Width (mm) 45 45 22.5 100 45 45 22.5 22.5 22.5 22.5 22.5 45 45 22.5 45 45 22.5

Supply Voltage

12VDC

24VDC

24VAC

48VAC

115VAC

230VAC

Contact strips/ Safety Mats

Category 3,up to PL d

For an unpressurized mat/strip, both the relay inputs mustbe closed for the outputs to be activated. In the case of anactivated mat/strip and short-circuit input channels, the relaywill be de-energized. Current limitation prevents the safetyrelay from being overloaded when the channels short-circuit.

MonitoredManual Reset

A monitoredreset means that the safetyrelay will not be reset if the re-set button gets jammed whenpressed in or if the input short-circuits. In order for the reset-ting to be complete, the inputmust be closed and openedbefore the outputs can close.

Automatic/ Unmonitored

ManualReset

Automatic reset meansthat the outputs are closedimmediately when boththe input conditions aresatisfied and the test inputis closed.

Testing ofContactors,

Relaysand Valves

Can be carried out with bothautomatic and manual reset.


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RT6 Safety RelayWould you like a singlesafety relay for all yoursafety applications?

Then choose the RT6 universal relay to superviseboth your safety devices and the internal safety of yourmachinery. In addition you can select the safety levelrequired for each installation. All this is possible be-cause the RT6 has the most versatile input option ar-rangement available on the market. Many other relayscan therefore be replaced by the RT6.

The relay also comes with other options such asmanual or automatic reset. Manual supervised resetcan be used for gates and other safety devices thatcan be passed through. Automatic reset can be usedfor small hatches, if deemed acceptable from a riskassessment.

The RT6 also has information outputs that follow theinputs and outputs of the relay. These outputs will forexample indicate if a gate is open or closed and if thesafety relay needs to be reset.

The RT6 is designed with a minimum amount ofcomponents thus keeping both production costs andcomponent acquisitions to a minimum. Choose the RT6 to simplify your safety circuits andreduce your costs.

Connection ExamplesFor examples of how our safety relays can solvevarious safety problems, see “Connection Examples”beginning on page 5:44.

Applications

■ Emergency Stops

■ Light Curtains

■ Three Position Devices

■ Interlocked Gates/Hatches

■ Magnetic Switches

■ Light Beams

■ Safety Mats

■ Contact Strips

■ Foot-Operated Switches

Features

■ Five input options■ Single or dual channel input

■ Manual supervised or automatic reset

■ Test input for supervision of external contactors

■ Width 45 mm

■ LED indication of supply, inputs, outputs, short-circuit and low voltage level

■ 3 NO/1 NC relay outputs

■ Two voltage free transistor information outputs

■ 24 VDC

■ 24, 48, 115 or 230 VAC

■ Quick release connector blocks

Approvals

TÜV Nord

5:8


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RT6 Technical Information

Inputs

The RT6 can be congured to operate in eitherof the following input options:

1. Single channel, 1 NO contact from +24 V DC, safety category 1.

2. Dual channel, 2 NO contacts from +24 V DC,

safety category 3.3. Dual channel 1 NO, 1 NC contact from +24 V DC, safety category 4.

4. Dual channel, 1 NO contact from 0V and 1 NOcontact from +24 V DC, safety category 4.

5. Safety mats/contact strips 1 ‘contact’ from 0V and 1 ‘contact’ from +24 V DC, safety category 1.

Note: Safety category only refers to the safety relay configuration, input devices, output devices and wiring must be considered for a safety category of the system.

When the input/inputs are activated and the test/super-vised reset is complete, relays 1 and 2 are energized.These are de-energized when the input/inputs are

de-activated in accordance with the input option cho-

sen or in case of a power failure. Relays 1 and 2 mustboth be de-energized before the RT6 can be reset.

Transistor Output Status Information

The RT6 has two voltage free transistor outputs thatcan be connected to a PLC, computer or other moni-toring device. These outputs give the input and output status of the relay.

Reset and Testing

The RT6 has two reset options; manual and automatic. The manual supervised reset is used when the RT6 ismonitoring safety devices that can be passed through,

i.e. to ensure that the outputs of the safety relay do not close just because a gate is closed. The automatic reset

should only be used if deemed an acceptable risk. In addition, the RT6 can also test (supervise), if forexample, contactors and valves etc. are de-energized/ de-activated before a restart is allowed.

Indication of Low Voltage

The ‘On’ LED will ash if the relay supply voltagefalls below an acceptable level. This indication willalso be given if a monitored safety mat/contact strip isactuated. See connection option 5.

Safety Level

The RT6 has internal dual and supervised safetyfunctions. Power failure, internal faulty component orexternal interference will not present a risk to optionswith the highest safety level. A manual reset requiresthat the reset input is closed and opened before thesafety relay outputs are activated. A short-circuit or afaulty reset button is consequently supervised. When the RT6 is congured for dual channel input,both the inputs are supervised for correct sequenceoperation before the unit can be reset. The input options 3 and 4 have the highest safetylevels as all short-circuits and power failures aresupervised. This in combination with double internal

current limitation makes the relay ideal for supervisionof safety mats and contact strips.

Regulations and Standards

The RT6 is designed and approved in accordancewith appropriate directives and standards. Examplesof such are: 98/37/EC, EN ISO 12100-1/-2, EN 60204-1 and EN 954-1/EN ISO 13849-1.

Connection Examples

For examples of how our safety relays can solvevarious safety problems, see “Connection Examples”beginning on page 5:44.

**Only for AC supply

Connection of SupplyDC Supply

The RT6 DC option should be sup-plied with +24 V on A1 and 0 V on A2.

AC Supply

The RT6 AC option should be sup-plied with the appropriate supply volt-age via connections A1 and A2.

The S23/ must be connectedto protective earth.

DC Supply of AC Units

All AC-units can also be suppliedby +24 VDC to S53 (0VDC to S23).

Note: With both DC and AC modules, if cable shielding is used this must beconnected to an earth rail or anequivalent earth point.


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RT6 Connection of Safety Devices

Manual Supervised Reset

The manualsupervisedreset contactconnected toinput X1 must be closed and opened inorder to activate the relay outputs.

RT6 Reset Connections

Automatic Reset

Automatic resetis selected whenS53, X1 and X4are linked. The relay outputs are then acti-vated at the same time as the inputs.

*connected to S13 for

safety mat/contact strip

Testing ExternalContactor Status

Contactors, relays and valves can besupervised by connecting ‘test’ contactsbetween S53 and X1. Both manual super-vised and automatic reset can be used.

RT6 Output Connections

Relay Outputs

The RT6 hasthree (3 NO)safety outputsand 1 NC infor-mation output.

In order toprotect the RT6output contacts it isrecommended that loads (inductive)are suppressed by tting correctlychosen VDRs, diodes, etc. Diodes arethe best arc suppressors, but will in-crease the switch off time of the load.

Transistor Outputs

The RT6 hastwo (2)voltage freetransistor information outputs. The transistor outputs are supplied withvoltage to Y13, either from S53 (+24V) oran external 5-30 VDC. Y14 and Y24 followthe relay inputs and outputs as follows:

• Y14 becomes conductive when the relay input conditions are fullled.

• Y24 becomes conductive whenboth the output relays are activated.

***Note: These outputs are only for information purposes and must not beconnected to the safety circuits of the

machinery.

*

1. Single Channel, 1 NO from +24V

The input (contact to S14) must be closedbefore the outputs can be activated. Whenthe input contact is opened the relay safetyoutput contacts open.

2. Dual Channel, 2 NO from +24V

Both input contacts (S14 and S34) mustbe closed before the relay outputs can beactivated. The safety relay contacts willopen if one or both of the input contactsare opened. Both the input contacts mustbe opened and reclosed before the relaycan be reset. A short-circuit between

inputs S14 and S34 can only be super-vised if the device connected to the inputshas short-circuit supervised outputs, e.g.Jokab Focus light curtains.

3. Dual Channel, 1 NO, 1 NC from +24V

One input contact must be closed (S14)and one opened (S44) before the relayoutputs can be activated. The safety relaycontacts will open if one or both of theinputs change status or in case of a short-circuit between S14 and S44. Both inputsmust return to their initial positions beforethe relay outputs can be reactivated.

4. Dual Channel, 1 NO from

+24V, 1 NO to 0V

Relay functions as option 2, but a short-circuit, in this case between inputs S14and S24, is supervised (safety outputs

are opened).

5. Safety Mat or Contact Strip

Both ‘contact’ inputs from a inactivatedsafety mat/contact strip must be madein order to allow the RT6 relay outputs tobe activated. When the safety mat/con-tact strip is activated or a short-circuit isdetected across S14-S23, the relay willde-energize (safety outputs open) and the‘ON’ LED will ash. As output S13 has aninternal current limit of 80 mA, the RT6will not be overloaded when the mat/con-tact strip is activated or a short circuit isdetected.

5:10


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RT6 Technical Data

Manufacturer ABB AB/Jokab Safety, Sweden

Ordering information see page 5:62

Color Grey

Weight 335 g (24 VDC)

485 g (24-230 VAC)

Supply Voltage (A1-A2) 24 VDC +15/-20%,

24/48/115/230 VAC,+15/-10%, 50-60 Hz

Power consumptionDC supply, nominal voltage AC supply, nominal voltage

2.3 W5.2 VA

Connection S13Short-circuit protected voltage output, 70 mA ± 10% current limitation(Is used for the inputs S14, S34 and S44)

Connection S53Short-circuit protected voltage output, internal automatic fuse 270 mA(Is used for the reset and autoreset inputs X1 and X4)

Connection S230V connection for input S24

Safety inputsS14 (+) inputS24 (0V) inputS34 (+) input

S44 (+) input

20 mA 20 mA 20 mA

30 mA Reset input X1Supply for reset inputReset current

Minimum contact closure time forreset

+ 24VDC300 mA current pulseat contact, then 30 mA

100 ms

Maximum external connectioncable resistance at nominal volt-age for S14, S24, S34S44, X1

300 Ohm150 Ohm

Response time At Power on DC/ACWhen activating (input-output)When deactivating (input–output)

At Power Loss


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RT7 Safety RelayUniversal Relay withDelayed ‘Stop’ Outputs

The RT7 is a universal relay that can be used tosupervise both safety devices and the internal safety of

your machinery. In addition, you can select the safetylevel that is required for each installation. All this ispossible because the RT7 has the most versatile inputoptions arrangement available on the market. The RT7can therefore replace many other relays. The RT7 has four (4 NO) dual safety outputs of whichtwo may be delayed for up to three seconds in orderto achieve a safe and ‘soft’ stop. A ‘soft’ stop allowsmachinery to brake and stop gently before power isremoved. A ‘soft’ stop has many benefits: The machin-ery life will be prolonged, processedproducts will not be damaged, and restarts from thestopped position are made possible and easier.

Another option with the RT7 is manual or automaticresetting. A manual supervised reset is used for gatesand other safety devices that can be passed through,while an automatic reset is used for small safety hatches if deemed appropriate from a risk point of view. In addition, the RT7 has information outputs thatfollow the inputs and outputs of the relay. These out-puts indicate if for example a gate is opened or closed, if there is a delay or if the relay needs to be reset. Choose the RT7 to simplify your safety circuits andreduce your costs.

Connection ExamplesFor examples of how our safety relays can solve

various safety problems, see “Connection Examples”beginning on page 5:44.

Applications

■ Emergency Stops

■ Light Curtains




■ Light Beams

■ Safety Mats

■ Contact Strips


Features

■ Five input options■ Single or dual channel input


■ Test input for supervision

of external contactors

■ Width 45 mm


■ 4 NO/1 NC relay outputs, 2 NO outputs can be delayed for soft stops

■ Delay times: RT7A 0; 0.5; 1.0; 1.5 s RT7B 0; 1.0; 2.0; 3.0 s

■ Three voltage free transistor

information outputs■ 24 VDC

■ 24, 48, 115 or 230 VAC


Approvals

TÜV Nord

5:12


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Inputs

The RT7 can be configured to operate in eitherof the following input options:

1. Single channel, 1 NO contact from +24 VDC, safety category 1.

2. Dual channel, 2 NO contacts from +24 VDC,

safety category 3.3. Dual channel 1 NO, 1 NC contact from +24 VDC, safety category 4.

4. Dual channel, 1 NO contact from 0V and 1 NOcontact from +24 VDC, safety category 4.

5. Safety mats/contact strips 1 ‘contact’ from 0V and 1 ‘contact’ from +24 VDC, safety category 1.


When the input/inputs are activated and the test/super-vised reset is complete, relays 1,2,3 and 4 are activated.Relays 1 and 2 are immediately de-energized when the

inputs are deactivated in accordance with the input option

selected. Relays 3 and 4 are either de-energized immediately or after the selected time delay. All the relays (1,2,3and 4) must be de-energized before the RT7 can be reset.


The RT7 has three voltage free transistor outputs thatcan be connected to a PLC, computer or other monitor-ing device. These outputs give the input and outputstatus of the relay.

Reset and Testing

The RT7 has two reset options; manual and automatic.The manual supervised reset is used when the RT7 is

monitoring safety devices that can be passed through, i.e. to ensure that the outputs of the safety relay do not

close just because the gate is closed. The automaticreset should only be used if deemed an acceptable risk. In addition, the RT7 can also test (supervise), if forexample, contactors and valves etc. are de-energized/ de-activated before a restart is allowed.

RT7 A/B Technical Information


The ‘On’ LED will flash if the relay supply voltagefalls below an acceptable level. This indication willalso be given if a monitored safety mat/contact strip isactuated. See connection option 5.

Safety Level

The RT7 has internal dual and supervised safetyfunctions. Power failure, internal faulty component orexternal interference will not present a risk to optionswith the highest safety level. A manual reset requiresthat the reset input is closed and opened before thesafety relay outputs are activated. A short-circuit ora faulty reset button is consequently supervised. When the RT7 is configured for dual channel input,both the inputs are supervised for correct sequenceoperation before the unit can be reset. The input options 3 and 4 have the highest safetylevels as all short-circuits and power failures aresupervised. This in combination with double internal




Connection Examples


**Only for AC supply


The RT7 DC option should be sup-plied with +24 V on A1 and 0 V on

A2.

AC Supply

The RT7 AC option should be supplied with the appropriate supplyvoltage via connections A1 and A2.

The S23/ must be connectedto protective earth.

DC Supply of AC Units

All AC-units can also be suppliedby +24 VDC to S53 (0VDC to S23).

Note: With both DC and AC modules, if cable shielding is used this must beconnected to an earth rail or anequivalent earth point.


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RT7 A/B Connection of Safety Devices


The input (contact to S14) must be closedbefore the outputs can be activated. Whenthe input contact is opened the relay safetyoutput contacts open.






4. Dual Channel, 1 NO from+24V, 1 NO to 0V


are opened).

5. Safety Mat or Contact Strip

Both ‘contact’ inputs from a inactivatedsafety mat/contact strip must be madein order to allow the RT7 relay outputs tobe activated. When the safety mat/con-tact strip is activated or a short-circuit isdetected across S14-S23, the relay willde-energize (safety outputs open) and the‘ON’ LED will flash. As output S13 has aninternal current limit of 60 mA, the RT7will not be overloaded when the mat/con-tact strip is activated or a short circuit isdetected.



RT7 A/B Reset Connections

Automatic Reset

Automatic resetis selected whenS53, X1 and X4are linked. The relay outputs are then acti-vated at the same time as the inputs.

*connected to S13 for safety mat/contact strip


Contactors, relays and valves can besupervised by connecting ‘test’ contactsbetween S53 and X1. Both manual super-vised and automatic reset can be used.

RT7 A/B Output Connections

Relay Outputs

The RT7 hasfour (4 NO)safetyoutputs, ofwhich twocan bedelayed, and1 NC information output.

In order to protect the RT7 outputcontacts it is recommended that loads (in-ductive) are suppressed by fitting correctlychosen VDRs, diodes, etc. Diodes are thebest arc suppressors, but will increase theswitch off time of the load.

Transistor Outputs

The RT7 has three (3) voltage free transis-tor information outputs. The transistor outputs are supplied withvoltage to Y13, either from S53 (+24V) or an external 5-30 VDC. Y14, Y24 and Y34 fol-low the relay inputs and outputs as follows:

• Y14 becomes conductive when the relay input conditions are fulfilled.

• Y24 becomes conductive whenboth the output relays are activated.

• Y34 becomes conductive when both thedelay output relays are activated.

***Note: These outputs are only for information purposes and must not beconnected to the safety circuits of the

machinery.

*

Time Delay Outputs

Time delays are selected by linking theappropriate T0, T1 and T2 connections. When a stop signal is detected a program stop command is first given to the PLC/servo which brakes the dangerous machine op-erations in a ‘soft’ and controlled way.

The delayed relay safety outputs will thenturn off the power to the motors, i.e. whenthe machinery has already stopped. Ittakes usually around 0.5 to 3 seconds for adangerous action to be stopped softly.

5:14


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RT7 A/B Technical DataManufacturer ABB AB/Jokab Safety, Sweden

Ordering information See page 5:62

Color Grey

Weight 405 g (24 VDC)

550 g (24-230 VAC)

Supply Voltage (A1-A2) 24 VDC +15/-20%,

24/48/115/230 VAC,±15%, 50-60 Hz

Power consumptionDC supply, nominal voltage AC supply, nominal voltage

4.6 W8.8 VA

Connection S13Short-circuit protected voltage output, 70 mA ±10% current limitation (Is used for the inputs S14, S34 and S44)

Connection S53Short-circuit protected voltage output, internal automatic fuse, max270 mA (Is used for the reset and autoreset inputs X1 and X4)

Connection S230V connection for input S24

Safety inputsS14 (+) inputS24 (0V) inputS34 (+) input

S44 (+) input

20 mA 20 mA 20 mA

25 mA Reset input X1Supply for reset inputReset current

Minimum contact closure time forreset

+ 24VDC600 mA current pulse at contactclosure, then 30 mA

100 ms

Maximum external connectioncable resistance at nominalvoltage for S14, S24, S34S44, X1

300 Ohm150 Ohm

Response time At Power on DC/ACWhen activating (input-output)When deactivating (input-output) At Power Loss


16/68


Applications

■ Emergency Stops

■ Light Curtains




■ Light Beams

■ Safety Mats

■ Contact Strips


Features

■ Five input options

■ Single or dual channel input


■ Test input for supervision ofexternal contactors

■ Width 22.5 mm


■ 2 NO relay outputs

■ 1 changeover relay with a dual information output

■ 24 VDC■ Detachable connection blocks

Approvals

TÜV Nord

RT9 Safety RelayWould you like a smallsafety relay for all yoursafety applications?

If so, then choose the compact RT9 universalrelay to supervise both your safety devices and theinternal safety of your machinery. In addition, youcan select the safety level that is required for eachinstallation. All this is possible due to the RT9 offeringthe most versatile input option arrangement availableon the market. The RT9 can therefore replace manyother relays. Other RT9 options include selection of eithermanual supervised or automatic resetting. The manualsupervised reset can be used for gates and othersafety devices that can be passed through. Automaticreset can be used for small safety hatches, if deemed

acceptable from risk assessment. In addition, the RT9 has a dual function informationoutput that will indicate, e.g. if a gate is open or if therelay needs resetting. The RT9 uses the latest component technology andmodern assembly techniques to ensure a highly costeffective solution. Choose the RT9 to simplify your safety circuits andreduce your costs.


5:16


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RT9 Technical Information


The RT9 should be supplied with +24 Von A1 and 0 V on A2.

Note: If cable shielding is used this must be connected to an earth rail or an equivalentearth point.Y14


The ‘On’ LED will flash if the relay supply voltagefalls below an acceptable level. This indication willalso be given if a monitored safety mat/contact stripis actuated.

Safety Level

The RT9 has internal dual and supervised safetyfunctions. Power failure, internal faulty component orexternal interference will not present a risk to optionswith the highest safety level. A manual reset requiresthat the reset input is closed and opened before thesafety relay outputs are activated. A short-circuit or afaulty reset button is consequently supervised. When the RT9 is configured for dual channel input,both the inputs are supervised for correct operationbefore the unit can be reset. The input options 3 and 4 have the highest safetylevels as all short-circuits and power failures aresupervised. This in combination with double internal




Connection Examples


Inputs

The RT9 can be configured to operate in eitherof the following input options:

1. Single channel, 1 NO contact from +24 VDC, safety category 1.

2. Dual channel, 2 NO contacts from +24 VDC,

safety category 3.3. Dual channel, 1 NO, 1 NC contact from +24 VDC, safety category 4.

4. Dual channel, 1 NO contact from 0V and 1 NOcontact from +24 VDC, safety category 4.

5. Safety mats/contact strips 1 ‘contact’ from 0V and 1 ‘contact’ from +24 VDC, safety category 1.


When the input/inputs are activated and the test/super-vised reset is complete, relays 1 and 2 are energized.These are de-energized when the input/ inputs are

de-activated in accordance with the input option chosen

or in case of a power failure. Relays 1 and 2 mustboth be de-energized before the RT9 can be reset.


The RT9 has a changeover contact relay output thatcan be connected to a PLC, control lamp, computeror similar. The output gives information about thestatus of the relay.

Reset and Testing

The RT9 has two reset options; manual and automatic. The manual supervised reset is used when the RT9 ismonitoring safety devices that can be passed through,

i.e. to ensure that the outputs of the safety relay do not close just because a gate is closed. The automatic reset should only be used if deemed an acceptable risk. Due to special internal circuits the RT9 can be auto- matically reset regardless of the operational voltagerise time, this being an important factor when largeloads are started up on the same power supplies atthe same time. In addition, the RT9 can also test (supervise), if forexample, contactors and valves, etc. are de-energized/ de-activated before a restart is made.


18/68




Automatic Reset

Automatic resetis selected when

A1(+), X1 and X4are linked. The relay outputs are then acti-vated at the same time as the inputs.


Contactors, relays and valves can besupervised by connecting ‘test’ contactsbetween A1(+) and X1. Both manual supervised and automatic reset can be used.

*

RT9 Connection of Safety Devices


The input (contact to S14) must be closedbefore the outputs can be activated. Whenthe input contact is opened the relay safe-ty output contacts open.






4. Dual Channel, 1 NO from+24V, 1 NO to 0V


are opened).

5. Safety Mat or

Contact Strip

Both ‘contact’ inputs from a inactivatedsafety mat/contact strip must be made inorder to allow the RT9 relay outputs to beactivated. When the safety mat/contactstrip is activated or a short-circuit isdetected across S14-S23, the relay willde-energize (safety outputs open) and the‘ON’ LED will flash. As output S13 has aninternal current limit of 85 mA, the RT9 willnot be overloaded when the mat/contactstrip is activated or a short circuit isdetected.

RT9 Reset Connections

RT9 Output Connections

Relay Outputs

The RT9 has two (2 NO)safety outputs.

In order to protect theRT9 output contacts it isrecommended that loads(inductive) are suppressed byfitting correctly chosen VDRs, diodes, etc.Diodes are the best arc suppressors, butwill increase the switch off time of the load.

Transistor Outputs

The RT9 has a changeover contactinformation output. The relay output Y14 is connectedinternally to 0V and 24V in thefollowing way:

• Y14 is internally closed to 0V when the RT9 is not reset.

• Y14 is internally closed to +24V whenthe RT9 is reset.

5:18


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RT9 Technical Data

Note:Connector

blocks aredetachablewithout cables

having to bedisconnected.



Color Grey

Weight 210 g

Supply Voltage (A1-A2) 24 VDC ±20%

Power consumption

Nominal voltage 2 WConnection S13 Short-circuit protected

voltage output70 mA ± 10% current limitation (Is used for the inputs S14,S34 and S44)

Input currents(at nominal supply voltage)S14 (+) inputS24 (0V) inputS34 (+) inputS44 (+) input

30 mA 20 mA 20 mA 25 mA

Reset input X1Supply for reset inputReset current

Minimum contact closure time

for resetMinimum contact closure time(at low limit voltage -20%)

+ 24VDC300 mA current pulse at contactclosure, then 30 mA

80 ms

100 ms

Maximum external connectioncable resistance at a nominalvoltage for S14, S24, S34S44, X1

300 Ohm150 Ohm

Response time At Power onWhen activating (input-output)When deactivating (input-output) At Power Loss


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Applications

■ Emergency Stops

■ Light Curtains




■ Light Beams


Features

■ Selectable inputs and safety category■ Manual supervised or automatic reset

■ Width 100 mm

■ LED indication of supply, inputs and outputs

■ 7 NO + 2 NC relay outputs

■ Supply 24 VDC 24, 48, 115 or 230 VAC



The JSBRT11 is designed and approvedin accordance with appropriate directivesand standards. See Technical Data.

Approvals

TÜV Nord

JSBRT11 Safety RelayFlexible SafetyRelay with

Various Outputs

The JSBRT11 has been designed toprovide the safety system circuit designerwith the ability to select from both a rangeof input connection configurations andeither automatic or supervised reset. The unit can be hardwire configuredto operate in either of the following inputconfigurations:

• Mode 1: Single Channel (1 NO contact from +24 VDC), safety category 1

• Mode 2: Dual Channel (2 NO contacts from +24 VDC), safety category 3

• Mode 3: Dual Channel (1NO, 1 NC contacts

from +24 VDC), safety category 4• Mode 5: Dual Channel (1 NO) contact from 0 V and 1 NO contact from +24 VDC), safety category 4

In addition, the unit can also be used to test thatcontactors and valves have fallen/returned to their‘reset’ state before a new ‘start’ signal is given.

Safety Level

The JSBRT11 has dual and monitored internal safetyfunctions. Power failure, internal component failures or external interference (with the exception of short circuiting of input contact when used in a single channelinput mode) do not result in a dangerous function.

When wired for supervised reset, should a shortcircuit appear across the reset input the relay will notautomatically reset when the input/inputs are made.Only when the supervised reset input is made andbroken will the relay reset.

The JSBRT11 provides detection of contact failurein the inputs when wired in dual channel mode. Bothinputs have to be opened and closed in order to enable the reactivation of the relay. The highest safety levelof the JSBRT11 is in configuration mode 3 or 4 be-cause all short circuits are supervised, i.e. a shortcircuit between the inputs leads to a safe state asthe outputs drop out.


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JSBRT11 Technical Data

JSBRT11 Technical Description

The supply voltage is connected across A1 and A2. The input connection configuration and type of reset required is set byconnecting the unit as shown in the dia-grams below. When the input/inputs andthe test/supervised reset are made K1 andK2 energize. K1 and K2 will de-energize if thepower is disconnected or a stop signalis given in accordance to the configurationmode wired. Both K1 and K2 have to be de-activated before the outputs of the JSBRT11can be closed again.

Configuration Mode 1When the single input opens both K1 andK2 relays are deactivated.

ConfigurationMode 2Both inputs have tobe closed in orderto enable the unit tobe activated. A stopsignal is given if both

or one input is opened. Both inputs have tobe opened and reclosed in order toenable the reactivation of the unit. If thepossibility of short circuits between theinputs cannot be excluded, configurationmode 3 or 4 should be used in order toreach the high safety level.

Configuration Mode 3One input has to be closed and the other in-put has to be opened in order to enable theunit to be activated. A stop signal is given ifboth or one input change state. Both inputshave to change state in orderto give a dual stop function and to allowa new start after stop.

Configuration Mode 4Operation as mode 2 but short circuitsbetween the inputs leads to a safe state, i.e.the relays inside the JSBRT11 will drop out.

Supervised reset connectionThe input to X1 (see diagram below) has tobe closed and opened in order to activatethe unit, after input/inputs are made accord-ing to the conguration mode selected.This mode is selected when X1 - X4 is opencircuit.

Automatic reset connectionThe input has to be closed in order toactivate the unit after input/inputs aremade according to the configuration modeselected. This mode is selected when aconnection between X1 and X4 is made.

TestTest contacts of contactors can be con-

nected between S53 and X1 for supervision.

JSBRT11 Electrical Connections

S u p p l y

***

**

*

Single Channel,* (Mode 1)1 NO from +24V

Dual Channel,* (Mode 3)1 NO, 1 NC from +24V

Supervised Manual Reset

Dual Channel,* (Mode 2)2 NO from +24V

Dual Channel,* (Mode 4)1 NO from +24V, 1 NO to 0V

Automatic Reset

*Note: With the input conditions shown, the JSBRT11 is in its de-energized state, i.e.output contacts are open. It is recommended that all switched loads are adequately suppressed and/or fused in order to provide additional protection for the safety contacts.



Color Grey

Power supply A1 - A2 24 VDC ± 15%

24, 48, 115, 230 VAC ± 15%,50-60 Hz

Power consumption 3.2 W/7.9 VA

Relay outputs 7 NO and 2 NCMaximum switching capacityResistive load AC

Inductive load AC

Resistive load DC

Inductive load DC

6A/250 VAC/1500 VA

AC15 240VAC 2A

6A/24 VDC/150 W

DC13 24VDC 1A

Max. total switching capacity 21A distributed on all contacts

Minimum load 10mA/10 V (if load on contacthas not exceeded 100 mA)

Contact material AgSnO2+ Au ash

Fuses output (external) 6A gL/gG

Conditional short-circuitcurrent (1 kA) 6A gG

Maximum input wireres. at nom. voltage

200 Ohm (S14,S24,S34,X1,X4);100 Ohm (S44)

Response time at deactivation(input-output)


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Applications

■ Two-Handed Devices of Type lllc

■ Emergency Stops



■ Safety Mats

■ Contact Strips


Features

■ Dual input channelssynchronism 0.5s

■ Supervised reset

■ Test input■ Width 45 mm

■ LED indication of supply,inputs and outputs


■ 24 VDC

■ 24, 48, 115 or 230 VAC



The JSBR4 is designed and approved inaccordance with appropriate directives andstandards. See Technical Data.

The JSBR4 complies with the highest safetylevel for connection of a two-hand controldevice of type IIIc in accordance with EN574.

Approvals

TÜV Nord

JSBR4 Safety RelayUniversal Relay forTwo-Handed Devices

The JSBR4 has two inputs, which both have to beclosed to keep the safety output contacts closed.

A short circuit across the inputs will cause the outputcontacts to open. The inputs can however be subject-ed to a continuous short circuit without damagingthe safety relay. In order to make the safety outputs close the resetinput must be closed and opened. In this way an unin-tentional reset is prevented in the case of a short circuitin the reset button cable or if the button gets jammedin the actuated position. The reset input can also beused for test/supervision to ensure that contactors orvalves have returned to their initial off "stop" positionbefore a new start can be allowed by the safety relay.

When the JSBR4 is used as a Two Hand relay both

buttons have to be pressed within 0.5 seconds of eachother in order to close the outputs. When the JSBR4 is used for Safety Mats and SafetyStrips the ”stop” condition is given following detec-tion of a short circuit between input channels A andB. Neither the safety mat, safety strip nor the relay willbe damaged by a continuous short circuit. This alsogives the advantage that if there is a failure betweenthe inputs in the installation, the safety relay will not bedamaged.

Safety Level

The JSBR4 has a twin supervised safety function.Neither component failure, short circuit or external

disturbances (power loss, etc.) will prevent the safefunction of the relay. This is valid both for the inputs

A and B as well as for the reset input. The JSBR4 oper-ates at the highest safety level for safety relays(PL e according to EN ISO 13849-1).

Connection Examples


5:22


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JSBR4 Technical Data

JSBR4 Technical Description

The electrical supply is connected across A1and A2. After Voltage reduction and Recti-fication (AC-versions) or reverse polarizationprotection (DC-version) there is an overloadprotection-circuit. When the inputs S13-S14 and S23-S24have closed and the reset is made, the relaysK1 and K2 are activated.

A dual stop signal is given when K1and K2 drop, due to short circuitingbetween the inputs, opening of theinputs or power failure. If one inputis opened the other input must also beopened for K1 and K2 to be activatedagain.

The monitoring circuit checks K1 and K2and that the reset circuit to X2 is both closedand opened before K1 and K2 are energized.Both the stop and reset function thereforecomply with the requirement that a componentfault, short circuit or external interference donot result in a dangerous function. The safety outputs consist of contacts from

K1 and K2 connected internally in seriesacross terminals 13 - 14, 23 -24 and 33 - 34.These contacts are used to cut the power tocomponents which stop or prevent hazard-ous movements/functions. It is recommend-ed that all switched loads are adequatelysuppressed and/or fused in order to provideadditional protection for the safety contacts.

Note: Output 41-42 is intended for the indica-tion purposes only, e.g. gate opened. No load between S14 and S24 allowed.

JSBR4 Electrical ConnectionsEmergencystop withmanualresetting.

Two-handdevice withbuttons inseparateor sameenclosure.Buttons tobe pressed in within 0.5 s ofeach other. Foot-pedal switches can be con-nected in the same configuration.

Interlockedgate withmanual reset.

Enabling de-vice JSHD4.Stop condi-tion is givenin both topand bottomPB positions.

Contact mator strip withmanual reset.

Control andsupervisionof externalcontactors,relay, valveor JokabSafety’sexpansion relays.

Note:Connector blocks aredetachablewithout cables

having to bedisconnected.



Color Grey

Power supply 24 VDC ± 15%24/48/115/230 VAC ± 15%, 50 -60 Hz


Relay outputs3 N

O +1 N

CMaximum switching capacityResistive load ACInductive load ACResistive load DCInductive load DC

6A/250 VAC/1500 VA AC15 240VAC 2A 6A/24 VDC/150 WDC13 24VDC 1A

Maximum res. load totalswitching capacity 12A distributed on all contacts

Mininum load 10mA/10 V (if load on contact hasnot exceeded 100 mA)

Contact material Ag + Au ash


Conditional short-circuit current(1 kA) 6A gG

Maximum input wireres. at nom. voltage

300 Ohm(S13 - S14 and S23 - S24)

Response time at deactivation < 20 ms (145 ms at power loss)Terminals(max. screw torque 1 Nm)Single strandConductor with socket contact

1 x 2.5 mm2 /2 x 1 mm2

1 x 4 mm2 /2 x 1.5 mm2

Mounting 35 mm DIN-rail

Protection classEnclosure/Terminals IP 40/20 IEC 60529

Operating temperature range -10°C to +55°C(with no icing or condensation)

Impulse withstand voltage 2.5kV

Pollution degree 2

Operating humidity range 35% to 85%

LED indication Electrical Supply, Inputs, OutputsWeight 350 g (24 VDC),

460 g (24-230 VAC)

ValuesWith proof test interval 1 year

Safety Category 4 according toEN 954-1, PL e, SIL 3,PFHd 1.35E-08

Conformity 2006/42/EC, 2006/95/EC2004/108/ECEN 954-1:1996, EN 62061:2005EN ISO 13849-1:2008

PROT.

CIRC. RESET & SUPERVISION CIRC.

* Only for AC-supply


24/68


Applications

■ Emergency Stops



■ Safety Mats

■ Contact Strips


Features

■ Dual channel input synchronism 0.5 s

■ Test input

■ Width 45 mm■ LED indication of power on, inputs

and outputs


■ 24 VDC

■ 24, 48, 115 or 230 VAC



The JSBT4 is designed and approved inaccordance with appropriate directives andstandards. See Technical Data.

Approvals

TÜV Nord

JSBT4 Safety RelaySafety Relay withSynchronized Dual InputChannels (within 0.5s)

The JSBT4 has two inputs, both of which have to beclosed in order to keep the safety output contacts closed.

A short circuit between inputs A and B will cause theoutput contacts to open. The inputs can be continu-ously short circuit without damaging the safety relay. For the outputs to close, the test input must beclosed. The test input is intended to monitor that con-tactors or valves have dropped/returned before a newstart is permitted. This test input must not be confused with the resetfunction required for gates that a person can walkthrough and where there is a high safety requirement(see JSBR4).

If the JSBT4 is used for safety Mats and SafetyStrips, the "stop" condition is given following detectionof a short circuit. Neither the Safety Mat, Safety Stripnor the relay will be damaged by a continuous shortcircuit. This also provides the advantage that if thereis a failure between inputs A and B in the installation,the safety relay will not be damaged.

Safety Level

The JSBT4 has a twin supervised safety function. Neithercomponent failure, short circuit or external disturbances(power loss, etc.) will prevent the safe function of therelay. (Category 3 or 4 depending on use.) The true two channel safety function has the advantage

that the cabling installation demands for safety can bereduced due to the fact that a short circuit between theinputs will directly open the relays safety outputs.

Connection Examples


5:24


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JSBT4 Technical Data

JSBT4 Technical Description

The electrical supply is connected across A1 and A2. After Voltage reduction andRectification (AC-versions) or reverse

polarization protection (DC-version) thereis an overload protection-circuit. When the inputs S13-S14 and S23- S24are closed within 0.5 seconds the relaysK1 and K2 are energized . A dual stop sig-nal is given, K1 and K2 de-energize, whenthere is a short circuit between or an

opening of the inputs and atpower loss. If one input is opened the other one also hasbe opened in order to activateK1 and K2 again. The test cir-cuit, X1- X2, has to be closedin order to activate the outputs,

thereafter the test circuit can be opened orclosed continuously. If the test circuit isclosed after the inputs there is no require-

ment to close them within 0.5 seconds. The internal supervision circuit monitorsthe two Inputs and relays K1, K2. The stopfunction then fulfills the requirement thatone failure (short circuit, component, exter-nal disturbance) shall not prevent the safefunction of the JSBT4.

The safety outputs consist of contactsfrom K1 and K2 connected internally inseries across terminals 13-14, 23-24 and33-34. These contacts are used to cut thepower to components which stop or pre-vent hazardous movements/functions. It isrecommended that all switched loads areadequately suppressed and/or fused inorder to provide additional protection forthe safety contacts.

The NC output 41-42 should only beused for monitoring purpose e.g. Indication lamp or PLC input, etc. The output con-tacts are closed until the module is reset.

Note: Output 41-42 is intended for the indica-tion purposes only, e.g. gate opened. No load between S14 and S24 allowed.

JSBT4 Electrical ConnectionsEmergencystop withautomaticresetting.

Monitoringto ensurethat theStart buttoncannot stickin pressed position. Short circuiting overthe closing contact is not monitored. TheRT-series and JSBR4 have built-in shortcircuiting monitored resetting.

Interlockedhatch withautomaticresetting.

Enabling de-vice JSHD4.Stop condi-tion is givenin both topand bottomPB positions.

Contact mator strip withautomaticreset.

Control andsupervisionof externalcontactors,relay, valveor JokabSafety’s expansion relays.

LOAD



Color Grey

Power supply 24 VDC ± 15%24/48/115/230VAC ± 15%,50 - 60 Hz


Relay outputs 3 NO + 1 NCMaximum switching capacityResistive load ACInductive load ACResistive load DCInductive load DC


Maximum res. loadtotal switching capacity 12A distributed on all contacts

Minimum load 10mA/10 V (if load on contact hasnot exceeded 100 mA)




Maximum input wireres. at nom. voltage 300 Ohm (S13 - S14 and S23 - S24)

Response time at deactivation < 20 ms, 145 ms with switchedsupply/power loss

Terminals(max. screw torque 1 Nm)Single strandConductor with socket contact

1 x 4 mm2 /2 x 1.5 mm2

1 x 2.5 mm2 /2 x 1 mm2

Mounting 35 mm DIN-rail

Protection classEnclosure/Terminals IP 40/20 IEC 60529

Operating temperature range -10°C to +55°C

(with no icing or condensation)Impulse withstand voltage 2.5kV

Pollution degree 2

Operating humidity range 35% to 85%

LED indication Electrical Supply, Inputs, Outputs

Weight 350 g (24VDC),460 g (24-230VAC)

ValuesWith proof test interval 1 year

Safety Category 4 according toEN 954-1, PL e, SIL 3,PFHd 1.51E-08

Conformity 2006/42/EC2006/95/EC 2004/108/ECEN 954-1:1996, EN 62061:2005EN ISO 13849-1:2008


26/68


Applications

■ Emergency Stops

■ Interlocked Hatches

■ Expansion of Safety Outputs

Features

■ Width 22.5 mm

■ LED indication


■ Test/reset input

■ 24 VDC

■ Single or dual channel■ BT50 - Additional power terminals


■ BT50T - 1 changeover relay with a double information output (Y14)

■ BT50T - Delay times selectable from 0 to 1.5 s


The BT50 is designed and approved inaccordance with appropriate directives andstandards. See Technical Data.

Approvals

TÜV Nord

BT50( T ) Safety Relay/ Expansion Relay

Single Channel Safety Relay

The BT50 is designed to connect safety devices, suchas emergency stops, directly in the voltage supply circuitto the relay. Despite a maximum built-in width of only 22.5mm, the relay is very powerful.

With 3 NO safety outputs, 1 NC output (for monitoringpurposes), a test input and complete internal supervision,the BT50 is quite unique. In addition, delayed outputs(BT50T) can be ordered. In order for the safety outputs to close, the supply volt-age, by means of an emergency stop button, must beconnected to A1 and A2 and the test input closed. Afteractuation of the relay the test input can be opened again. The test input is intended to supervise that contactorsor valves have dropped/returned before a new start canbe permitted. The test input can also be used for startingand the start button can be supervised (see Connection

Example on next page).

More Outputs

By connecting BT50 to a safety relay/PLC it is easy toincrease the number of safe outputs. This means that anunlimited number of dangerous machine operations andfunctions can be stopped from one safety relay/PLC.

Safety Level

The BT50 has a twin and supervised internal safety func-tion. Power failure, internal component faults or externalinterference cannot result in dangerous functions. Input via A1 only is not protected from short circuitingand therefore installation is critical for the safety level to

be achieved. To achieve a higher safety level, a screenedcable can be used and/or connection made to both A1and A2 (see Technical Description on next page).

Connection Examples


5:26


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When supply voltage is connected to A1and A2, relays K1 and K2 are activated. K1and K2 drop if the supply voltage is dis-connected. Both relays K1 and K2 mustdrop for them to be activated again. The

test circuit, A1 - X4 can either be open orconstantly closed. The supervising circuit ensures that both

K1 and K2 have dropped beforethey can be reactivated. The stopfunction complies with therequirement that a componentfault or external interference can-not lead to a dangerous function. The safety outputs consist of

contacts from K1 and K2 connected inter-nally in series across terminals 13-14,23-24, and 33-34. These contacts areused to cut the power to componentswhich stop or prevent hazardous move-

ments/functions. It is recommended thatall switched loads are adequately sup-pressed and/or fused in order to provide

Supervision Circuit

BT50( T ) Technical Description

additional protection for the safety contacts. The NC output 41-42 should only beused for monitoring purposes e.g. indica-tion lamp for emergency stop pressed.

JSB50T Information Output

JSBT50T Delay Times

BT50( T ) Technical Data

BT50( T ) Electrical Connections

Emergency stop with reset whenemergency button returns.

Emergency stop with dual connectiondirect to the supply voltage.

Hatch with automatic reset.

Controlled monitoring of externalcontactor, relay, valve or JokabSafety’s expansion relays.

JSBT50 as emergency stop and controlrelay with Start and Stop function.

Monitoring to ensure that the On button isnot stuck in pressed position. A short circuitover the closing contact is not monitored.*Note: BT50 has additional power

terminals A1 and A2.

Manufacturer ABB AB/Jokab Safet y, Sweden


Color Grey

Operational voltage 24 VDC + 15%/-25%

Power consumption 1.4 W/1.8 W

Relay outputs 3 NO + 1 NC

Maximum switching capacity

Resistive load ACInductive load ACResistive load DCInductive load DC


Maximum res. load totalswitching capacity 12A distributed on all contacts

Mininum load 10mA/10 V(if load on contacthas not exceeded 100 mA)




Maximum input wireres. at nom. voltage 200 Ohms

Response time at deactivation(input - output)

Version B


28/68


Applications

■ Emergency Stops


■ Expansion of Safety Outputs

Features

■ Width 22.5 mm

■ LED indication

■ 4 NO relay outputs

■ Test/reset input

■ 24 VDC

■ Single or dual channel■ BT51 - Additional power terminals


■ BT51T - 1 changeover relay with a double information output (Y14)

■ BT51T - Delay times selectable from 0 to 1.5 s


The BT51 is designed and approved inaccordance with appropriate directives andstandards. See Technical Data.

Approvals

TÜV Nord

BT51(T) Safety Relay/ Expansion Relay

Single Channel Safety Relay

The BT51 is designed to connect safety devices, suchas emergency stops, directly in the voltage supply circuitto the relay. Despite a maximum built-in width of only22.5 mm, the relay is very powerful.

With 4 NO safety outputs, test input and completeinternal supervising, the BT51 is quite unique. In additionyou can order delayed outputs (BT51T). In order for the safety outputs to close, the supplyvoltage, by means of an emergency stop button, must beconnected to A1 and A2 and the test input closed. Afteractuation of the relay the test input can be opened again. The test input is intended to supervise that contactorsor valves have dropped/returned before a new start canbe permitted. The test input can also be used for startingand the start button can be supervised (see ConnectionExample on next page).

More Outputs

By connecting BT51 to a safety relay/PLC it is easy toincrease the number of safe outputs. This means that anunlimited number of dangerous machine operations andfunctions can be stopped from one safety relay/PLC.

Safety Level

The BT51 has a twin and supervised internal safety func-tion. Power failure, internal component faults or externalinterference cannot result in dangerous functions. Input via A1 only is not protected from short circuitingand therefore installation is critical for the safety level tobe achieved. To achieve a higher safety level, a screened

cable can be used and/or connection made to both A1and A2 (see Technical Description on next page).

Connection Examples


5:28


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When supply voltage is connected to A1and A2, relays K1 and K2 are activated. K1and K2 drop if the supply voltage is dis-connected. Both relays K1 and K2 mustdrop for them to be activated again. Thetest circuit, A1 - X4 can either be open or

constantly closed.

The supervising circuit ensuresthat both K1 and K2 have droppedbefore they can be reactivated.The stop function complies withthe requirement that a componentfault or external interference can-not lead to a dangerous function.

The safety outputs consist of contactsfrom K1 and K2 connected internally inseries across terminals 13-14, 23-24,33-34 and 43-44. These contacts are usedto cut the power to components whichstop or prevent hazardous movements/

functions. It is recommended that all

BT51( T ) Technical Description

switched loads are adequately suppressedand/or fused in order to provide additionalprotection for the safety contacts.

JSB51T Information Output

JSBT51T Delay Times

BT51( T ) Technical Data

BT51( T ) Electrical Connections




Controlled monitoring of externalcontactor, relay, valve or JokabSafety’s expansion relays.

JSBT51 as emergency stop and controlrelay with Start and Stop function.

Monitoring to ensure that the On button isnot stuck in pressed position. A short circuitover the closing contact is not monitored.

*Note: BT51 has additional powerterminals A1 and A2.

Supervision Circuit

Manufacturer ABB AB/Jokab Safe ty, Sweden


Color Grey

Operational voltage 24 VDC + 15%/-25%

Power consumption 1.4 W/1.8 W

Relay outputs 4 NO

Maximum switching capacity

Resistive load ACInductive load ACResistive load DCInductive load DC


Maximum res. load total switchingcapacity 12 A distributed on all contacts

Minimum load 10mA/10 V (if load on contacthas not exceeded 100 mA




Maximum input wireres. at nom. voltage 200 Ohms

Response time at deactivation


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JSBT5( T ) Safety RelaySingle Channel Safety Relay

The JSBT5 is designed to connect safety devices,such as emergency stops, directly in the voltage supplycircuit to the relay. Despite a maximum built-in widthof 22.5 mm the relay is very powerful.

With 3 NO safety outputs, 1 NC, test input and com-plete internal supervising, the JSBT5 is quite unique. Inaddition you can order delayed outputs (JSBT5T). In order for the safety outputs to close, the supplyvoltage, e.g. by means of an emergency stop button,must be connected to A1 and A2 and the test inputclosed. After actuation of the relay the test input can beopened again. The test input is intended to supervise that contactorsor valves have dropped/returned before a new startcan be permitted. The test input can also be used forstarting and the start button can be supervised (seeconnection example on next page).

Safety Level

The JSBT5 has a twin and supervised internal safetyfunction. Power failure, internal component faultsor external interference cannot result in dangerousfunctions. Input via A1 only is not protected from short circuiting,and therefore installation is critical for the safety level tobe achieved. To achieve a higher safety level a screenedcable can be used and/or connection made to both A1and A2.

Connection Examples

For examples of how our safety relays can solve varioussafety problems, see “Connection Examples” beginning

on page 5:44.

5:30

Applications

■ Emergency Stops


Features

■ Width 22.5 mm

■ LED indication

■ 3 NO/1NC relay outputs

■ Test/start input

■ Supply 12VDC, 24 VDC/AC

■ Single or dual channel

■ (T) = delayed outs 0.5 seconds


The JSBT5(T) is designed and approved inaccordance with appropriate directives andstandards. See Technical Data.

Approvals

TÜV Nord


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When supply voltage is connected to A1and A2, relays K1 and K2 are activated.K1 and K2 drop if the supply voltage isdisconnected. Both relays K1 and K2must drop for them to be activated again.

Another requirement is that the test

circuit, X1 - X2, must be closedfor the outputs to be activated.Thereafter X1 - X2 can eitherbe open or constantly closed.

The supervising circuitensures that both K1 and K2have dropped before they can

be reactivated. The stop functioncomplies with the requirement that acomponent fault or external interferencecannot lead to a dangerous function.

The safety outputs consist of contacts

from K1 and K2 connected internally in

JSBT5( T ) Technical Description

series across terminals 13 - 14, 23 - 24,and 33 - 34. These contacts are used tocut the power to components which stopor prevent hazardous movements/ functions. It is recommended that allswitched loads are adequately suppres-sed and/or fused in order to provideadditional protection for the safetycontacts.

The NC output 41 - 42 should only beused for monitoring purposes e.g. indica-tion lamp for emergency stop pressed.

JSBT5( T ) Technical Data

JSBT5( T ) Electrical Connections




Controlled monitoring of externalcontactor, relay, valve or Jokab Safety’sexpansion relays.

JSBT5(T) as emergency stop and controlrelay with Start and Stop function.

Monitoring to ensure that the On button isnot stuck in pressed position. A shortcircuit over the closing contact is notmonitored. The JSBR4 has built in shortcircuit monitored resetting.

*Note: BT51 has additional powerterminals A1 and A2.

Manufacturer ABB AB/Jokab Safe ty, Sweden


Color Grey

Operational voltageJSBT5JSBT5T

24 VDC/AC + 15%–25%, 50–60 Hz12 VDC, 24 VDC/AC + 15% –25%,50 - 60 Hz

Power consumption 1 W/1.9 VA

Relay outputs 3 NO + 1 NC

Max. switching capacityResistive load ACInductive load ACResistive load DCInductive load DC


Maximum res. load total switchingcapacity 9A distributed on all contacts

Mininum load 10mA/10 V (if load on contacthas not exceeded 100 mA)

Contact material AgCuNi



Maximum input wire

res. at nom. voltage 200 Ohm

Response time at deactivation

Documents

ABB JokabSafety Section05 SafetyRelays