GAS DETECTION SYSTEMtoxicgasdetection.co.uk/products/regard/documents... · GAS DETECTION SYSTEM INSTRUCTIONS FOR USE B A 0 V 24V 24V 0 V 24V CH1 0 V 24V CH2 0 V 24V CH3 0 V 24V CH4

8-INPUT 4-20 MODULE8-CHANNEL DISPLAY CARD(ATEX VERSION)

REGARDGAS DETECTION SYSTEM

INSTRUCTIONS FOR USE

BA

0 V24V

24V0 V

24VCH10 V

24VCH20 V

24VCH30 V

24VCH40 V

24VCH50 V

24VCH60 V

24VCH70 V

24VCH80 V

8-CHANNEL DISPLAY

A2

A1

Power

Inhibit

RSHIFT

h1 : 0

Fault

A3

REGARD 8-Input 4-20 Module & 8-Channel Display Card (ATEX Version)

Issue 1 – June 2003

3

CONTENTSFOR YOUR SAFETY 5

OPERATION 6Intended use 6Description 6

General 6Power-on sequence 6Command mode 7

Master card 7Modbus gateway card 7Electromagnetic compatibility (EMC) 7Display card front panel controls and indicators 8

Display 8LEDs 8Push buttons 8

Input module terminals 9Operational faults 10

Operational fault codes 10

INSTALLATION 12Install input module 12

Connect RS-485 output to display card 12Connect transmitters to input module 13Connect DC supply to module 15

Install 8-channel display card 15Optional connections 16

A1, A2, Fault alarm relays 16Remote reset 16

CONFIGURATION 17Command mode 17

Function of front panel controls in command mode 17Accessing command mode 18Entering a password 18Changing a password 18Save configuration settings 19Locking card in command mode 19Quit command mode 19Table of commands 19

Basic configuration 21Set number of heads connected to module 21Set gas name 21Set gas units 21Set measurement range (FSD) 22Set alarm trip levels 23Set rising or falling alarms 23Set alarm latch mode 24Set zero 25Set span 25

Advanced configuration 26Set Regard channel numbers 26Set Regard communications checksum 26Set over-range latch 27



4

Set relay energise state 27Set zero drift band 28Set under-range fault level 28Set over-range fault level 28Set alarm hysteresis 29Set user-definable text 29Gas level display on / off 29Set LEDs to display master alarms or per head alarms 30Display head number or channel number 30

MAINTENANCE 31Recommended maintenance intervals 31Commands for system maintenance 31

Test LEDs and display 31Test remote reset 31Test alarm relays 32Test communications with 8-input module 32Disable alarm relays 32

TECHNICAL DATA 33CE marking and ATEX marking 34EC-Type Examination certificate 35



5

FOR YOUR SAFETYFollow the instructions

Follow the instructions for installation, operation and maintenance.

Use in areas subject to explosion hazards

The 8-input 4-20 module and 8-channel display card are not designed for use in aflammable atmosphere without suitable protection.

Liability for proper function or damage

Liability for proper function of this apparatus is irrevocably transferred to the owner oroperator to the extent that the apparatus has been commissioned, serviced or repairedby personnel not employed or authorised by Draeger Service, or when this apparatuswas used in a manner not conforming to its intended use.

Draeger Limited can not be held responsible for any damage caused by non-compliancewith the above recommendations. The warranty and liability provisions of the terms andconditions of sale and delivery of Draeger Limited are likewise not modified byrecommendations given above.

Maintenance

This apparatus must be inspected and serviced by experts at regular intervals and arecord maintained of such inspections and servicing. Repairs and general overhaul ofthis apparatus should only be carried out by competent personnel.

We recommend that either a training course or service contract is obtained fromDraegerService and that all repairs are carried out by them.



6

OPERATIONIntended use

The REGARD 8-channel display card and 8-input 4-20 module provide:

• Measurement and display of gas level with gas measuring heads (transmitters) suchas Polytron 2. The equipment can be used with any 4-20mA transmitter.

• Activation of alarms when pre-set gas levels are exceeded.

The input module and display card are intended for permanent installation in a non-hazardous environment, such as a control room or marshalling cabinet.

DescriptionGeneral

The 8-input 4-20 module takes signals from up to eight 2-wire or 3-wire 4-20mAmeasuring heads (transmitters). The module provides terminals for field cables and DCpower to the transmitters. Signals from the eight inputs are multiplexed onto an RS-485connection for transmission to the 8-channel display card. The display card displays thegas level of each head and indicates alarm and fault conditions.

The display card has three alarm relays for

• A1 gas alarm

• A2 gas alarm

• Fault alarm

Each 8-input module requires an 8-channel display card. Only one module can beconnected to a display card.

The input module and display card can be located in separate enclosures or buildings.The maximum distance of the RS-485 cable between the module and display card is1km.

Power-on sequenceWhen power is applied to the display card, it is immediately inhibited and put into itsdefault state, all relays are de-energised. After about two seconds, when theconfiguration settings have been read from the non-volatile memory, these settings areapplied. So if the A1 and A2 relays are set normally energised, they will change state.The display card remains inhibited for a user definable period (default is the minimum of30 seconds) allowing time for heads connected to the input module to settle. During thisperiod no data from the input module is processed by the display card. Once this power-on inhibit period has elapsed data begins to be read from the module and the displaycard enters its normal operating state.



7

Command modeIntroduction

All card settings, such as measurement range, zero, span, alarm levels, gas name andalarm operation, are set using the commands available in command mode.

There are three levels of access in command mode, two of which require the entry of apassword:

• Read level, in which configuration settings can be read but not altered, and basictesting done (no password needed);

• Maintenance level, which allows access to commands used during regular calibrationand maintenance (requires maintenance password);

• Configuration level, which allows access to all commands used to set up the card(requires configuration password).

Refer to the Configuration section for a detailed description of Command mode and thecommands available.

Alarm inhibitWhen a card is put into command mode gas alarms (A1 and A2) are inhibited: the relayswill remain in their current state and will not change state unless changed manually. Anyrelay already in its alarm state when the card enters command mode will remain in thatstate. The Inhibit LED lights and the Fault relay trips to indicate that alarms are inhibited.

You can manually change the state of the alarm relays while in command mode usingcommands 14–4 (A1 relay), 14–5 (A2 relay) and 14–6 (Fault relay).

Locking cards in command modeCards exit command mode automatically if no buttons are pressed for 10 minutes. Tolock a card in command mode use command 60–0. Note that this command is notavailable in read mode.

Master cardThe Regard Master card provides common and/or voted alarm outputs and advancedsetup facilities. For more information refer to the Regard Master Card Operating Manual.

Modbus gateway cardThe Regard Modbus gateway interface card provides a Modbus interface for Regardsystems. For more information refer to the Regard Modbus Gateway Card OperatingManual.

Electromagnetic compatibility (EMC)The Regard 8-input 4-20 module and display card have been tested for compliance withthe EMC Directive. Take the following steps to ensure compliance:

• Installation must follow the instructions given in this manual.

• Installation must also follow the Draeger document “Guidelines for the constructionand installation of Regard systems to comply with the EMC Directive” which isavailable separately.

• Observe instructions to use screened cable, where given

Instructions or precautions that are essential for electromagnetic compatibility areidentified by “EMC!” in the margin.



8

Display card front panel controls and indicatorsDisplay

Display normally shows gas level of each head in sequence. When an alarm occurs,display shows gas level of head(s) in alarm only.

Display Meaning

h1:0 Gas level for head 1 (gas level is 0)

h8:3 Gas level for head 8 (gas level is 3)

36:12 Alternative display of gas level, showing Regard channelnumber instead of head number.(E.g. gas level of channel 36 is 12.)

h1:FSD (‘FSD’ blinking) indicates that head 1 is over-range, i.e. thegas level exceeds the current FSD setting. See also Setover-range latch on page 27.

12:HCAL Indicates that the head on channel 12 is in calibration mode

FAULT.. Operational fault

LEDs

LED State Meaning

A3 No function

A2, A1, FaultOff

Flashing

On

No alarm

Alarm tripped, not acknowledged

Alarm tripped & acknowledged

Power On

Flashing

DC power on

Operational fault

Inhibit

On

Blinking on (normallyoff, on every 2.5 s)

Blinking off (normallyon, off every 2.5 s)

Relays inhibited

Relay(s) disabled

Relays inhibited + relays disabled

Push buttonsFunction of front panel controls during normal operation:

Push button Function

Ç Display gas name. E.g. h1:CO2

È Display gas units. E.g. h2:PPM

SHIFT + Ç Display A1 trip level.Arrow after number indicates rising (Ç) or falling (È) alarmE.g. h3:20ÇÇ

SHIFT + È Display A2 trip level. E.g. h3:40ÇÇ

Æ Display next head (channel).

Å Display previous head (channel).

Æ + Å Hold / release current channel.(Press both push buttons at same time.)

R Acknowledge / reset alarm



9

Input module terminals

RS-485 OUTPUT

DC INPUT 1

DC INPUT 2

BA

0 V24V

24V0 V

24VCH10 V

24VCH20 V

24VCH30 V

24VCH40 V

24VCH50 V

24VCH60 V

24VCH70 V

24VCH80 V

4-20mA INPUT 2

4-20mA INPUT 1

4-20mA INPUT 3

4-20mA INPUT 4

4-20mA INPUT 5

4-20mA INPUT 6

4-20mA INPUT 8

4-20mA INPUT 7



10

Operational faultsAn operational fault is a failure in operation of either the display card or input module.Operational faults are either• critical – card may stop working, or• advisory – card will continue to work safely, but its functions may be limited

When an operational fault occurs:• Power LED flashes once a second• If fault is critical, fault relay alternately energises and de-energises at 1Hz• Display shows fault code alternately with normal display

In the situation where multiple faults occur consecutively, the first fault to occur will bedisplayed. When that is cleared subsequent faults may be displayed if they areunaffected by the clearing of prior faults.

In the situation where multiple faults occur simultaneously, only one will be indicated onthe display. The fault states are monitored continuously in the following order:C, CM, BR, BÇ, BÈ, BÅ, BÆ, BS, BR, RR, D, E, I, L and H.

Any of these may be overridden by the hardware exception faults M and We.

Press R to clear the fault. If fault will not clear, or recurs, call DraegerService.

Operational fault codes

(See table on next page.)



11

Fault code Meaning Remedy

FAULT BRFAULT BSFAULT BÇFAULT BÈFAULT BÅFAULT BÆ

Push button fault. Advisory.Push button indicated appears to be continuously pressed.

Check push buttons.

FAULT C Communications error – Regard. Critical.Communication with the master card has failed. Gas leveldisplay continues and alarm relays will continue to operate,but functions controlled by master card may not operate.

Check RS-485 connectionbetween master card anddisplay card.

FAULT CM Communications error – module. Critical.Communication between display card and input module hasfailed. No gas level measurements are available.

Check RS-485 connection toinput module.

FAULT D Data error. Critical.Configuration settings have been corrupted. Defaultconfiguration settings will be used.

Check configurationsettings.

FAULT E EEPROM failure. Critical.Configuration data has been lost. Default configurationsettings will be used.

Replace card.

FAULT H Supply voltage too high. Critical. Reduce supply voltage.

FAULT L Supply voltage too low. Critical. Increase supply voltage.

FAULT M Microcontroller failure. Critical.Display card or input module has stopped working.

Hold down R to reset thecard.

FAULT I Configuration settings corrupted. Advisory.Settings held in RAM differ from those in EEPROM.

EEPROM data will beautomatically reloaded.Press R to clear fault. If itpersists replace card.

FAULT RR Remote reset fault. Advisory.Remote reset terminals appear to be continuously shorted.The remote reset input will be ignored.

Check connections toremote reset input.

FAULT We Watchdog reset. Advisory.Unknown error caused card to reset. Card will continue tooperate normally.

Check installation.



12

INSTALLATIONInstall input module

Fit input module on 35mm symmetric or 32mm asymmetric DIN rail.

EMC! Install the input module and display card in an enclosure that gives protection againstelectromagnetic interference.

Handle circuit boards with care during installation. Do not touch the circuit board orcomponents. Take anti-static precautions were necessary.

Connect RS-485 output to display cardConnect RS-485 output of input module to screw terminals on Regard rackcorresponding to position of 8-channel display card.

• Use twisted-pair cable

• Maximum length of connection is 1 km.

• Ensure that 0V potential between input module and display card is less than ±5V. UseRS-485 isolator(s) if necessary.

Do not connect the RS-485 output of the module to the terminals for a single-channel 4-20 card or Ex card, or a HART card: this will damage the module.

123

54

6789

10111213141516

BA

REGARD RACK

BA

4-20 MODULE

0 V

24V

24V

0 V



13

EMC! If cable between module and display card is routed outside enclosure:

• Use screened twisted-pair cable

• Pass the cable through a ferrite tube between the cable entry and the input module,and between the cable entry and the display card

• Keep distance between cable gland and ferrite tube short.

Position of ferrite tube for input module:

AB

Connect transmitters to input moduleRefer to transmitter installation instructions.

Transmitters must be connected to the input module starting from Channel 1 and thenconsecutively until all heads are attached or all ports are used.

EMC! Use screened cable to connect transmitters. Connect cable screen to earth where itenters the enclosure that contains the input module.

4-20 MODULE

24V

CH n0V

2-WIRETRANSMITTER

+–

24V

CH n0V

3-WIRE TRANSMITTER(CURRENT SOURCE)

+

–4-20mA

4-20 MODULE



14

WARNING – when using 3-wire transmitters, in order to ensure that a short circuitbetween the 4-20mA output and the zero volt line at the transmitter causes a faultindication on the display card, the cable resistance must be kept below the values shownin the following table.

For example:

the transmitter takes typically 80mA,under range fault trip has been set to 3.5mA on the display card,

then the cable core resistance must be kept below 12 ohms.

The formula used to generate the values in the table is

faulttran

faultcable

IIIR×−

×<2

255

where:

cableR is the resistance in ohms of one core of the cable running from the input moduleto the transmitter,

faultI is the under range fault current in mA set at the display card,

tranI is the current supply in mA from the input module to the transmitter.

This formula assumes that the three cores of the connecting cable each have the sameresistance.

Maximum cable resistance per core (in ohms) for fault currents of:Transmittercurrent (mA) 3.5mA 3.0mA 2.5mA 2.0mA

40 27.0 22.5 18.2 14.2

50 20.8 17.4 14.2 11.1

60 16.8 14.2 11.6 9.1

70 14.2 12.0 9.8 7.7

80 12.2 10.3 8.5 6.7

90 10.8 9.1 7.5 5.9

100 9.6 8.1 6.7 5.3

110 8.7 7.4 6.1 4.8

120 7.9 6.7 5.5 4.4

130 7.3 6.2 5.1 4.0

140 6.7 5.7 4.7 3.8

150 6.2 5.3 4.4 3.5



15

Connect DC supply to module

Connect DC supply to DC input 1 or 2.

POWER SUPPLY18 – 35V DC

B

A

4-20 MODULE

0 V24V

24V

0 V+

–

Other input can be used to connect DC supply another module. Maximum currentallowed through input terminals: 1A

Ensure that the 0V potential between input module and display card is less than ±5V. Ifpotential difference exceeds 5V, use RS-485 isolator between input module and card.

Install 8-channel display cardInsert 8-channel display card into slot in Regard rack wired to 8-input module.

EMC! Tighten the screws on the front panel fully.



16

Optional connectionsA1, A2, Fault alarm relays

If required, connect using screw terminals on Regard rack.

RELAYS SHOWNDE-ENERGISED

FAULT

A2

A1

1

3

5

7

9

11

13

15

2

4

6

8

10

12

14

16

Remote resetIf required, connect normally-open contact to 8-channel display card, to remotelyacknowledge or reset alarms. Connect using screw terminals on Regard rack.

EMC! Use screened cable.

REGARD RACK

123

54

6789

10111213141516



17

CONFIGURATIONCommand mode

Configuration and maintenance of the display card is performed using front panelcontrols and display, by setting the card into command mode.

In command mode:

• Gas levels are no longer displayed.

• The Inhibit LED lights and the Fault relay trips to indicate that operation of the alarmrelays is prevented (“inhibited”).

• Transfer of alarm status information to the Regard master card (if present) isprevented.

• A1, A2 and Fault LEDs do not flash.

Function of front panel controls in command mode

Key Function

R Confirm entry or selection

Ç Select next command or optionIncrease displayed value

È Select previous command or optionDecrease displayed value

Æ Select next head

Å Select previous head

EXAMPLE

• Commands that allow a setting to be made for each head show thehead number after the command number, e.g. command 04–0 04–0:h1

• Whenever head number (e.g. h1) is shown, press Å or Æ toselect a different head number, e.g. head 2 04–0:h2

Display may show Regard channel number in place of head number, ifcard is set to display channel numbers (command 60-2).E.g. 04–0:22

• Press R to select head shown. Display shows command name … GAS NAME

… and then shows current setting for that head, e.g. h2:H2S

• Head number is shown before the setting.Different head number can be chosen by pressing Å or Æ… h3:CO2

…or, if card is set to display channel numbers: 22:CO2



18

Accessing command modeAccess to commands is password protected. Passwords allow access to maintenancecommands and configuration commands. Without entry of a password, someconfiguration settings can be examined, but not changed.

DISPLAY

• Press the R push button for 5 seconds, until the display shows: 00–0

Software version is shown briefly, e.g.: v2.5

• Press Ç or È to select command number.

Entering a passwordPRESS DISPLAY

• Select command 00–1 ÇÇ ÈÈ R PASSWORD

Waiting for entry of password, first character flashing ????

• Select first character of password. e.g. C ÇÇ ÈÈ C???

• Confirm first letter. Second character flashes. R CC??

• Select and confirm remaining characters ÇÇ ÈÈ R CCCC

Display shows access level, and exits command CONFIG

00–1

Factory setting of passwords:• Configuration level: CCCC• Maintenance level: MMMM

Changing a passwordThe password being changed is determined by the current access level.

PRESS DISPLAY

• Select command 00–3 ÇÇ ÈÈ R CHG P.WD

Waiting for entry of password, first character flashing ????

• Select first character of password. e.g. C ÇÇ ÈÈ D???

• Confirm first letter. Second character flashes. R DD??

• Select and confirm remaining characters ÇÇ ÈÈ R DEFG

Display shows access level, and exits command CFG:NEW

00–3



19

Save configuration settingsPRESS DISPLAY

• Select command 00–2 ÇÇ ÈÈ R SAVE

Asking for confirmation to save settings SAVE:NO

If no settings have been changed, display shows: SAVE:NO!

• Select YES ÇÇ ÈÈ SAVE:YES

• Confirm action… R WAIT

…confirmation that settings have been saved… SAVED:OK

…command exits 00–2

Locking card in command modeDisplay card automatically exits command mode if no buttons are pressed for 10minutes. To prevent card from automatically exiting command mode, use command60–0.

PRESS DISPLAY

• Select command 60–0 ÇÇ ÈÈ R CMD LOCK

NO

• Select YES to lock in command mode ÇÇ ÈÈ YES

• Confirm selection and exit command R LOCKED

60–0

Quit command modePRESS DISPLAY

• Select command 00–0 ÇÇ ÈÈ R QUIT:NO

• Select YES ÇÇ ÈÈ QUIT:YES

• Confirm action… R h2:50

Table of commands(See next page.)



20

Cmd. Command Function Command mode level DefaultNo. Name Read Maint. Config. Setting

00–0 CMD QUIT Quit command mode • • •00–1 PASSWORD Enter password • • •00–2 SAVE Save settings • •00–3 CHG P.WD Change password • •04–0 GAS NAME Set gas name o o • CH4

04–1 UNITS Set gas units o o • %LEL

04–2 FSD Set FSD (range) o o • 100

04–3 FSD LOCK Set over-range latching o • YES

04–4 A1 ENER. Set relays normally energised or o • ON ALARM

04–5 A2 ENER. energise on alarm o • ON ALARM

10-0 SET ZERO Set zero o •10-1 SET SPAN Set span o •10–2 DRIFT Set zero drift band • 0.0%

10–7 FLT U/R Set under-range fault level o o • 2.0

10–8 FLT O/R Set over-range fault level o o • OFF

11–0 HYST Set alarm hysteresis • 1.0%

11–1 A1 TRIP Set A1 alarm level o o • 20

11–2 A2 TRIP Set A2 alarm level o o • 40

11–4 A1 MODE Set A1 rising/falling o o • RISE

11–5 A2 MODE Set A2 rising/falling o o • RISE

11–7 A1 LATCH Set relays latching, non-latching, o • DNAK

11–8 A2 LATCH delay-latching, acknowledgeable, o • DNAK

11–9 F LATCH non-acknowledgeable o • DNAK

14–0 LED TEST Test display & LEDs • • •14–1 RMT TEST Test remote reset • • •14–4 A1 TEST Test A1 relay • •14–5 A2 TEST Test A2 relay • •14–6 F TEST Test Fault relay • •14–8 TEST MOD Test input module communications • •52–0 HEADs Set number of heads o o • h1 – h8

52–1 CARDs Set channel numbers o o • Ch0

52–4 USER Set user definable text • ????

52–6 CHECKSUM Set communications checksum • CRC

60–0 CMD LOCK Lock card in command mode • • NO

60–1 DISPLAY Gas level display on / off • ON

60–2 LEDs Set function of LEDs o o • COMMON

60–3 HEAD NUM Display head or channel number o o • HEAD h_

60–4 A1 DIS. Disable A1 relay • • NO

60–5 A2 DIS. Disable A2 relay • • NO

Key:

• Command available at this level, and setting can be changed

o Command available at this level, but setting cannot be changed



21

Basic configurationSet number of heads connected to module

Set the number of heads connected to input module.

PRESS DISPLAY

• Select command 52–0 ÇÇ ÈÈ R HEADs

Display shows current setting: e.g. h1–h8

• Select number of heads, e.g. 3 ÇÇ ÈÈ h1–h3

• Confirm selection and exit command R 52–0

Set gas namePRESS DISPLAY

• Select command 04–0 ÇÇ ÈÈ R GAS NAME

Display shows current setting of head 1: e.g. H2S h1:H2S

• Select gas name for head 1, e.g. SO2 ÇÇ ÈÈ h1:SO2

• Select next head. Current setting shown. ÅÅ ÆÆ h2:CH4

• Select gas name for head 2, e.g. CO2 ÇÇ ÈÈ h2:CO2

Repeat for other heads


Set gas unitsPRESS DISPLAY

• Select command 04–1 ÇÇ ÈÈ R UNITS

Display shows current setting of head 1: e.g. h1:%LEL

• Select head to change. Current setting shown. ÅÅ ÆÆ h2:%LEL

• Select gas units for head, e.g. PPM ÇÇ ÈÈ h2:PPM

• Select next head to change. ÅÅ ÆÆ h3:%LEL


• Confirm settings and exit command R 04–1



22

Set measurement range (FSD)PRESS DISPLAY

• Select command 04–2 ÇÇ ÈÈ R FSD

Display shows current setting of head 1: e.g. h1:100

• Select head to change. Current setting shown. ÅÅ ÆÆ h2:250

• Select FSD for head, e.g. 50 ÇÇ ÈÈ h2:50

New FSD confirmed NEW FSD

• Select next head to change. Current setting shown. ÅÅ ÆÆ h3:100



WARNING – when a new FSD is selected and confirmed, the alarm mode is set torising and the trip levels are reset to their default values of 20% and 40% of FSDfor A1 and A2 alarms respectively.

The resolution of the display depends on the selected range. The following table givesthe resolution and the number of decimal places displayed for a positive reading on eachrange.

Range Resolution Dec.Places

Range Resolution Dec.Places

0 – 1 0.01 2 0 – 100 1 00 – 2 0.01 2 0 – 200 1 00 – 3 0.01 2 0 – 250 1 00 – 5 0.01 2 0 – 300 1 0

0 – 10 0.1 1 0 – 500 1 00 – 20 0.1 1 0 – 1000 1 00 – 25 0.1 1 0 – 3000 10 00 – 30 0.1 1 0 - 9999 25 00 – 50 0.1 1



23

Set alarm trip levelsCommands 11–1 and 11–2 set alarm trip levels for A1 and A2 respectively. Thesecommands are identical in operation, only 11–1 is detailed here.

PRESS DISPLAY

• Select command 11–1 ÇÇ ÈÈ R A1 TRIP

Display shows current trip level of A1 alarm for head 1: h1:20

• Select head to change. Current setting shown. ÅÅ ÆÆ h2:50

• Select trip level for head, e.g. 25 ÇÇ ÈÈ h2:25

• Select next head to change. Current setting shown. ÅÅ ÆÆ h3:20



Set rising or falling alarmsCommands 11–4 and 11–5 set the mode of operation of the A1 and A2 relays.A1 and A2 alarms can be set to trip with either rising or falling gas levels.The operation of these commands is identical so only command 11–4 is detailed here.

PRESS DISPLAY

• Select command 11–4 ÇÇ ÈÈ R A1 MODE

Display shows current mode of A1 (A2) for head 1: h1:RISE

• Select head to change. Current setting shown. ÅÅ ÆÆ h2:RISE

Select RISE for rising alarmSelect FALL for falling alarm

• Select next head to change. Current setting shown. ÅÅ ÆÆ h3:RISE





24

Set alarm latch modeCommands 11–7, 11–8 and 11–9 set the latch mode of the A1, A2 and Fault relays.These commands are identical in operation, only 11–7 is detailed here.

PRESS DISPLAY

• Select command 11–7 ÇÇ ÈÈ R A1 MODE

Display shows current mode of A1 alarm for head 1: h1:DNAK

• Select head to change. Current setting shown. ÅÅ ÆÆ h2:DNAK

Select NAK for non-latching, non-acknowledgeableSelect LNAK for latching, non-acknowledgeableSelect DNAK for delay-latching

• Select next head to change. Current setting shown. ÅÅ ÆÆ h3:DNAK



The following table describes the various latch modes available.

Mode Function

NAK Non Latching and Non Acknowledgeable

Relay returns to its non-alarm state when the relay alarm condition hascleared. Acknowledging the relay alarm whilst the alarm condition is still truewill not reset the relay.

LNAK Latching and Non AcknowledgeableReturns to its non alarm state when the alarm condition stops and then thealarm is acknowledged. Acknowledging the relay alarm whilst the alarmcondition is still true will not reset the relay. The relay will not automatically goback to its non-alarm state when the alarm condition stops.

DNAK Delay Latching and Non-Acknowledgeable

Relay returns to its non alarm state when the alarm condition stops and thealarm has been acknowledged. Acknowledging the relay alarm whilst thealarm condition is still true will not reset the relay. The relay will automaticallygo back to its non-alarm state when the alarm condition stops if the relay hasalready been acknowledged.



25

Set zeroPRESS DISPLAY

• Select command 10–0 ÇÇ ÈÈ R SET ZERO

Display shows reading of head 1: e.g. h1:2

• Select required head. Current reading shown. ÅÅ ÆÆ h2:–3

• Set display to zero ÇÇ ÈÈ h2:0

• Select next required head ÅÅ ÆÆ h3:–2

• Confirm setting. Command exits R 10–0:h2

NOTE – after adjustment of the zero level, the span setting must also be checked and,when necessary, adjusted.

TroubleshootingCannot set display to zero:• Limit of adjustment range reached. Check output of transmitter is 4.0mA and re-

calibrate if necessary.

Set spanPRESS DISPLAY

• Select command 10–1 ÇÇ ÈÈ R SET SPAN

Display shows reading of head 1: e.g. h1:2

Apply gas to measuring head, or manually set outputof transmitter, e.g. to 12mA.

• Select required head. Reading shown. ÅÅ ÆÆ h2:48

• Set display to appropriate reading, e.g. 50 ÇÇ ÈÈ h2:50

• Repeat for other heads ÅÅ ÆÆ h3:–2

• Confirm setting. Command exits R 10–1:h2



26

Advanced configurationSet Regard channel numbers

For communication with a Regard master card, set the channel number for each head(transmitter).

• Channel numbers on a display card need not be consecutive (but channel numbersfor the Regard system must be contiguous).

• Heads with channel number 0 do not communicate with the master card.

PRESS DISPLAY

• Select command 52–1 ÇÇ ÈÈ R CARDs

Display shows current setting of head 1: e.g. channel 0 h1:Ch0

• Select channel number of head 1, e.g. 9 ÇÇ ÈÈ h1:Ch9

• Select next head. Current channel setting shown. e.g. ÅÅ ÆÆ h2:Ch0

• Select channel number of head 2, e.g. 12 ÇÇ ÈÈ h2:Ch12



Set Regard communications checksumPRESS DISPLAY

• Select command 52–6 ÇÇ ÈÈ R CHECKSUM

Current setting, e.g. CRC

• Select error-checking method: e.g. CSUM ÇÇ ÈÈ CSUM

Use CRC whenever possible. All cards in Regardsystem must use same setting.




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Set over-range latchIf the gas level exceeds the current FSD setting then ‘FSD’ will flash on and off in thedisplay alongside the appropriate head or channel number. Normally this display islatched so that if the gas level falls the FSD over-range indication remains. This is usefulin situations where flammable gas detectors are used where gas concentrations greaterthan LEL can cause the output from the head to drop.This command allows the latching operation to be disabled.

PRESS DISPLAY

• Select command 04–3 ÇÇ ÈÈ R FSD LOCK

Display shows current setting of head 1: e.g. h1:YES

• Select head to change. Current setting shown. ÅÅ ÆÆ h2:YES

• Select setting for head, e.g. NO ÇÇ ÈÈ h2:NO

• Select next head to change. Current setting shown. ÅÅ ÆÆ h3:YES


• Confirm selection and exit command R 04–3:h8

Set relay energise stateSet each alarm relay on the display card to normally energised or energise on alarm.

Command 04–4 (set A1 relay energise mode) is described here: command 04–5 (A2relay) is identical in operation.

PRESS DISPLAY

• Select command 04–4 ÇÇ ÈÈ R A1 ENER.

Display shows current setting of A1 relay: e.g. ON ALARM

Select NORMALLY for relay normally energised.Select ON ALARM for relay energise on alarm.

DISABLED indicates that relay is disabled(see commands 60–4 and 60–5)

• Select setting for A1 relay, e.g. normally energised ÇÇ ÈÈ NORMALLY




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Set zero drift bandPRESS DISPLAY

• Select command 10–2 ÇÇ ÈÈ R DRIFT

Display shows current setting of head 1: e.g. h1:0.0%

• Select head to change. Current setting shown. ÅÅ ÆÆ h2:2.5%

• Select setting for head, e.g. 3% ÇÇ ÈÈ h2:3.0%

• Select next head to change. Current setting shown. ÅÅ ÆÆ h3:0.0%



Set under-range fault levelPRESS DISPLAY

• Select command 10–7 ÇÇ ÈÈ R FLT U/R

Display shows current setting of head 1: e.g. h1:2.0

• Select head to change. Current setting shown. ÅÅ ÆÆ h2:2.5

• Select setting for head, e.g. 3mA ÇÇ ÈÈ h2:3.0

• Select next head to change. Current setting shown. ÅÅ ÆÆ h3:2.0



Set over-range fault levelPRESS DISPLAY

• Select command 10–8 ÇÇ ÈÈ R FLT O/R

Display shows current setting of head 1: e.g. h1:OFF

• Select head to change. Current setting shown. ÅÅ ÆÆ h2:21.5

• Select setting for head, e.g. 23mA ÇÇ ÈÈ h2:23.0

• Select next head to change. Current setting shown. ÅÅ ÆÆ h3:OFF





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Set alarm hysteresisPRESS DISPLAY

• Select command 11–0 ÇÇ ÈÈ R HYST

Display shows current setting of head 1: e.g. h1:1.0%

• Select head to change. Current setting shown. ÅÅ ÆÆ h2:1.0%

• Select setting for head, e.g. 1.5% ÇÇ ÈÈ h2:1.5%

• Select next head to change. Current setting shown. ÅÅ ÆÆ h3:1.0%



Set user-definable textUser-definable text can be used to enter non-standard gas name or measurement unit.Text entered is used when USER setting is chosen in command 04–0 or 04–1.

PRESS DISPLAY

• Select command 52–4 ÇÇ ÈÈ R USER

Waiting for text entry: first character flashing ????

• Enter text. e.g. mg/l ÇÇ ÈÈ R mg/l

(Press Å or Æ to select next or previous character)

• Select next / previous head ÅÅ ÆÆ 52–4:h2


Gas level display on / offNormal display of gas level can be disabled for any head, if required.

PRESS DISPLAY

• Select command 60–1 ÇÇ ÈÈ R DISPLAY

• Select ON for normal display, or OFF to disabledisplay of gas level ÇÇ ÈÈ h1:ON




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Set LEDs to display master alarms or per head alarmsA1 and A2 LEDs may indicate alarm status of each head or the common status of allactive heads.

PRESS DISPLAY

• Select command 60–2 ÇÇ ÈÈ R LEDs

Display shows current setting, e.g. COMMONCOMMON : LEDs indicate alarms for all headsEACH I/P : LEDs indicate alarms for head currently

displayed

• Select setting required, e.g. ÇÇ ÈÈ EACH I/P


Display head number or channel numberPRESS DISPLAY

• Select command 60–3 ÇÇ ÈÈ R HEAD NUM

Display shows current setting, e.g. HEAD h _

CHAN _ _ : Display channel number.HEAD h _ : Display head number.

• Select setting required, e.g. display channel number ÇÇ ÈÈ CHAN _ _


Note: the head number is still displayed if no channel number has been set forthat head (i.e. channel number is 0).



31

MAINTENANCERecommended maintenance intervals

EN 50073 and respective national regulations should be observed.

Transmitters should be checked and re-calibrated at the intervals specified in therespective instruction manual.

Daily:• Visual check for readiness for operation

At regular intervals:

• Inspection by trained personnel.The inspection intervals in each individual case are subject to technical safetyconsiderations, engineering processes and the technical requirements for theequipment. Every six months is recommended.

• Check connections from heads (transmitters) to signal inputs and between inputmodule and display card

• Test LEDs and alarm relays• If connected, test remote reset• Check communications between display card and module

Commands for system maintenanceTest LEDs and display

PRESS DISPLAY

• Select command 14–0 ÇÇ ÈÈ R LED TESTAll LEDs and display segments flash.

• Stop test R 14–0

Test remote resetPRESS DISPLAY

• Select command 14–1 ÇÇ ÈÈ R RMT TEST

Display shows status of remote reset input: OPENOPEN : circuit openCLOSED : circuit closed

• End test R 14–1



32

Test alarm relaysThe A1, A2 and Fault relays can be operated manually, to test alarms. Command 14–4(test A1 relay) is described here: commands 14–5 (test A2 relay) and 14–6 (test Faultrelay) are identical.

PRESS DISPLAY

• Select command 14–4 ÇÇ ÈÈ R A1 TEST

Display shows status of relay: e.g. A1: ONON : relay energisedOFF : relay de-energised

• Change state of relay ÇÇ ÈÈ A1: OFF


Test communications with 8-input modulePRESS DISPLAY

• Select command 14–8 ÇÇ ÈÈ R TEST MOD

Display shows number of data packets received 123

• To reset count to zero: ÇÇ ÈÈ 0


Disable alarm relaysThe A1 and A2 alarm relays can be disabled, to prevent alarms being activated duringmaintenance. When disabled, the relay will always stay in its non-alarm state.

Command 60–4 (disable A1 relay) is described here: command 60–5 (disable A2 relay)is identical in operation.

PRESS DISPLAY

• Select command 60–4 ÇÇ ÈÈ R A1 DIS.

NO

• Select YES to disable relay ÇÇ ÈÈ YES

• Confirm selection and exit command R DISABLED

60–4

The Fault relay will be tripped when one or more relays are disabled, even in normalmode.

Inhibit LED blinks to indicate that one or more relays are disabled.

Warning: a disabled relay will not indicate a gas alarm or fault alarm.



33

TECHNICAL DATADisplay card

Supply voltage 18 to 35V DC

Environmental operating ranges

• Temperature –20° to +55°C

• Humidity 0 to 90%RH, non-condensing

• Vibration To BS 2011 Part 2.1Fc

Storage temperature range –25° to +70°C

Current consumption

• Typical 50mA

• Maximum 200mA

Relays

• Type Single pole double throw (1 Form C)

• Switching capacity 5A, 250VAC; 5A 30VDC

• Max. switching power 1,250VA, 150W

• Max. switching voltage 250VAC, 100VDC

• Min. switching voltage & current 12V, 100mA

Format Single Eurocard, 10 HP front panel

Dimensions 187 x 129 x 50mm

Fuse 800mA quick blow (F), 20 x 5mm

Input moduleSupply voltage 18 to 35V DC

Environmental operating ranges

• Temperature –20° to +55°C

• Humidity 0 to 90%RH, non-condensing

• Vibration To BS 2011 Part2.1Fc

Storage temperature range –25° to +70°C

Current consumption (excluding transmitters) 50mA

Max. supply to each transmitter 0.5A

Wire cross-section

• Transmitter inputs 2.5 mm2

• DC inputs & RS-485 1.5 mm2

4-20mA input range 0.5 – 22mA

Dimensions 210 x 90 x 60mm

Fuses

• Module supply (Fuse 1) 200mA quick blow (F) 20 x 5mm

• Transmitters supply (Fuse 2) 4A slow blow (T) 20 x 5mm

Note that for both the display card and the input module, DMT testing covers:• operating temperatures: 0 to +55°C• storage temperatures: –25° to +55°C

Part numbersDescription Part Number

Regard 8-channel display card 4206699

Regard 8-input 4-20mA module 4206700



34

CE marking and ATEX markingRegard cards and modules are CE marked to indicate conformity with the essentialrequirements of the “ATEX” Directive 94/9/EC:

0518

The number after the CE mark is the number of the Notified Body involved theproduction control phase.

The card also carries the following marking in accordance with the directive:

This marking means that the card is suitable for use in non-hazardous areas, in non-mining Category 2 applications for the detection of flammable gases.

THIS MARKING DOES NOT MEAN THAT THE CARD IS “EXPLOSION PROOF”.Regard cards cannot be used in areas subject to explosion hazards (“hazardousareas”) without suitable additional protection.

The certification code corresponds with the ATEX EC-type-examination certificate:

DMT 02 ATEX G 002 X

The year of construction of the card can be derived from the card's serial number.

II (2) G



35

EC-Type Examination certificate

Draeger LtdKitty Brewster Industrial EstateBlyth, NorthumberlandNE24 4RGEngland

Tel. +44 1670 352891Fax +44 1670 356266

Dräger Sicherheitstechnik GmbHRevalstrasse 1D-23560 LübeckGermany

Tel. +49 451 882 2794Fax +49 451 882 4991

Draeger Industrie S.A.3c, route de la FédérationF-67025 Strasbourg CedexFrance

Tel. +33 3 88 40 76 76Fax +33 3 88 40 76 67

http://www.draeger.com/gds

Draeger Safety, Inc.P.O. Box 120Pittsburgh, PA 15230USA

Tel. +1 412 787 8383Fax +1 412 787 2207

Draeger South East Asia Pte, Ltd.67, Ayer Rajah Crescent #06-03SGP-0513 SingaporeSingapore

Tel. +65 872 9288Fax +65 773 2033

Beijing Fortune Draeger SafetyEquipment Company LimitedJixiang Lu B AreaBeijing Tianzhu Airport Industrial ZoneHoushayu, Shunyi CountyBeijing 101300, PR China

Tel. +8610 6949 8000Fax +8610 6949 8006

Manual P/N 4206727Issue 1 – June 2003Subject to alteration

For use with 8-channel display card software version D1.2 and V3.0

Documents

GAS DETECTION SYSTEMtoxicgasdetection.co.uk/products/regard/documents... · GAS DETECTION SYSTEM INSTRUCTIONS FOR USE B A 0 V 24V 24V 0 V 24V CH1 0 V 24V CH2 0 V 24V CH3 0 V 24V CH4