VM-21P 3-WIRE LVDT SIGNAL CONDITIONER INSTRUCTION · PDF file · 2017-09-22VM-21P 3-Wire LVDT Signal Conditioner Instruction Manual Thank you for purchasing the VM-21 Series VM-21P

MANUAL No. 20606E1.1 Published in Jul. 2006 Revised in Sep. 2007

Carefully read and understand this manual before using this equipment.

After reading this manual, store it in a safe location where it can be consulted at any time.

VM-21 Series

VM-21P

3-WIRE LVDT SIGNAL CONDITIONER

INSTRUCTION MANUAL

VM-21P 3-Wire LVDT Signal Conditioner Instruction Manual

Thank you for purchasing the VM-21 Series VM-21P 3-Wire LVDT Signal Conditioner. This instruction manual explains the operation of and cautionary instructions for the VM-21 Series VM-21P 3-Wire LVDT Signal Conditioner.

Important Information

VM-21P 3-Wire LVDT Signal Conditioner Instruction Manual - 1 -


Carefully read and understand this manual before using this product. After reading this manual, store it in a safe location where it can be consulted at any time.

If you have any questions regarding this manual or the product, contact the sales office where it was purchased for assistance.

When using this product, it is necessary to be knowledgeable about not only the information in this manual, but also any instrumentation that is connected to this product. Also, general knowledge about safety is required in addition to the safety information provided in this manual.

The VM-21 Series uses a variety of noise tests to evaluate EMC (electro-magnetic compatibility). However, since the following environmental conditions will cause fluctuations in EMC characteristics, it is important to ensure the stability of the system according to the cautionary instructions found in this manual. Volume of noise produced Temperature and humidity Equipment layout

If this product is combined with other instrumentation and then resold or transferred as part of an assembly, be sure that this manual is given to the end user.

When disposing of this product, follow all local laws and regulations.

This product is used in combination with the VM-21G Signal Conditioner socket and the VM-21H backplane unit (sold separately). Some descriptions of these parts are included in this manual, when explaining how to install and wire this product.

The illustrations in this manual of parts that are sold separately may differ from their actual appearance.

The company and product names appearing in this manual are the trademarks and registered trademarks of those companies.

Shinkawa Sensor Technology, Inc. owns the copyright to this manual. No part of this manual may be made public or copied/duplicated in any manner without permission.



Liability

Shinkawa Sensor Technology, Inc. shall not be liable for any damage or injury that occurs as a result of failure to observe the instructions in this manual, or careless operation or installation of this product.

Compensation shall not be made for any damage, injury, or loss that occurs as a direct or indirect result of the incorrect use, improper use, modification, or disassembly of this product.

Shinkawa Sensor Technology, Inc. does not provide, implicitly or otherwise, any guarantee for merchantability, specific uses, or patent violation, beyond what is indicated in this manual and warranty provisions.

The warranty provisions for this product are included at the back of this manual. In the event of trouble with this product, repairs will be performed according to these warranty provisions.

Shinkawa Sensor Technology, Inc. shall not be liable for any trouble that occurs as a result of the use of parts other than those that have been recommended.

Checking the Product and Packaging

Shinkawa Sensor Technology, Inc. performs vigorous quality control and quality inspections, to

provide highly reliable products.

When this product is delivered, make sure it is the product that was ordered, and check for any

damage that may have occurred during shipment and any missing accessories.

If the product is damaged or accessories are missing, contact the sales office where the product

was purchased for assistance.

In addition to this manual, the following product is included:

VM-21P 3-Wire LVDT Signal Conditioner (this product)

VM-21G Signal Conditioner Socket

1章

Contents


Contents Page

Important Information .............................................................................................................1 Liability ...................................................................................................................................2 Checking the Product and Packaging ....................................................................................2

Section 1 Safety Information ..............................................................................................4 1.1 Warning symbols........................................................................................4 1.2 Cautions .....................................................................................................4

Section 2 Introduction.........................................................................................................6 2.1 Scope of application ...................................................................................6 2.2 Specifications .............................................................................................6

2.2.1 Product specifications .....................................................................6 2.2.2 VM-21G Signal Conditioner Socket

Specifications ..................................................................................8 2.2.3 VM-21H Backplane Unit (sold separately) Specifications ...............9 2.2.4 VM-21H Backplane Unit (sold separately)

Expansion Specifications ..............................................................11 2.3 External dimensions and part names .......................................................12

2.3.1 External dimensions and part names............................................12 2.3.2 VM-21G Signal Conditioner Socket

External dimensions and part names............................................12 2.3.3 VM-21H Backplane Unit (sold separately)

External dimensions and part names............................................13

Section 3 Installation ........................................................................................................14 3.1 Installation environment ...........................................................................15 3.2 Installing the product ................................................................................17

3.2.1 Using a signal conditioner socket for installation ..........................17 3.2.2 Using a backplane unit for installation...........................................19

3.3 Wire connections......................................................................................20 3.3.1 Connecting the transducer ............................................................20 3.3.2 Connecting the output signal receiver...........................................25 3.3.3 Connecting the power supply........................................................26 3.3.4 Checking connections ...................................................................27

Section 4 Corrections .......................................................................................................28 4.1 Correction preparation..............................................................................28 4.2 Correcting the product..............................................................................29

Section 5 Maintenance and Inspections...........................................................................30 5.1 Regular inspections..................................................................................30 5.2 Product life ...............................................................................................30 5.3 Troubleshooting........................................................................................30

Section 1 Safety Information


ATTENTION

ATTENTION


Read this section carefully in order to use this product safely.

1.1 Warning symbols

The following symbols are shown with information in this manual that must be observed in order to prevent situations that are hazardous to the user and/or could cause property damage, and to use this product safely. Carefully read and follow the instructions.

Warning symbol Meaning

This symbol is used to warn against the possibility of serious or fatal injury. Follow the instructions to ensure safety.

This symbol is used to caution against the possibility of injury. Follow the instructions to ensure safety.

This symbol is used to draw attention to the possibility of property damage. Follow the instructions to prevent damage to equipment.

Point Point is used to emphasize important instructions, and provide helpful information.

1.2 Cautions

Be sure to observe the following to ensure safety when using this product.

Prohibited Actions

DO NOT disassemble or modify this product. Also, do not use it with any standards other than what is indicated in the specifications. Doing so could result in damage to the product, fire, or injury.

Do not use wireless equipment, such as transceivers, or handy phones around this product. Exposing this product, the signal cables, or the transducer to electromagnetic waves could result in a reduction in the precision indicated in the specifications.

WARNING

CAUTION

WARNING



ATTENTION

Required Actions

When installing this product, be sure to follow the procedure explained in “Section 3 Installation”. Failure to do so could result in damage to the product, fire, or injury.

Before using this product, be sure to read the instruction manuals for the equipment to which it is connected. Specialized knowledge of both equipment and related instrumentation is required to use this product.

Before touching this product, be sure to touch a nearby metal area to discharge any static electricity. Failure to do so could cause this product to be damaged by static electricity that has built up in your body.

Use a delayed circuit protector. Failure to do so could result in the product becoming damaged by the inrush electrical current when the power supply is turned on. The level of inrush current is several times greater than normal input current. (The level of inrush current will differ depending upon the timing when the power supply is turned on, and the impedance of the supply source.)

When performing a mega test (insulation test) on signal transmission cables, be sure to remove the cables from the driver (transducer) and signal conditioner. In addition, be sure to short-circuit the cables before reconnecting them after a mega test to discharge any electrical charge. Connecting cables with an electrical charge to the driver or signal conditioner could result in damage to the product.

Perform the following measures to ensure the stability of the system. - Be sure to install surge killers on the product and related equipment, as well as on the

relays around the signal cables connecting the equipment. - Tighten installation screws to securely fix all units. - Install an interlock function on the system to prevent misoperation in the event of

trouble with the product. If any of the following situations occur, stop using the product and contact the sales office

where it was purchased for assistance. Continuing to use the product in abnormal conditions could result in fire or damage. - When the product emits foul odors - When the product becomes abnormally hot - When the product falls or is dropped - When the product’s case becomes damaged

When storing the product, place it in a location free from direct sunlight. Store it in a location free from high temperature, high humidity, and corrosive gas. - Temperature: −40 to 70°C - Humidity: 10 to 90％ RH (no condensation)

WARNING

Section 2 Introduction



2.1 Scope of application This product is used in combination with either the VM-21G Signal Conditioner Socket, or the VM-21H Backplane Unit (sold separately), and receives signals from a 3-WIRE LVDT SIGNAL CONDITIONER (LVDT), and converts them to insulated 4 to 20mA DC or 1 to 5V DC. Do not use for any other purposes.

2.2 Specifications

2.2.1 Product specifications

Power supply Measuring range Input LVDT Full range of

input LVDT Output Conditioner socket

1 24VDC 20 25mm S LS Series 050 50mm 1 1 to 5VDC 0 Without 2 100 to 240VAC/DC 21 50mm 100 100mm 2 4 to 20mADC 1 Include 22 75mm 150 150mm 23 100mm 200 200mm 24 150mm 250 250mm 25 200mm 300 300mm 26 250mm 350 350mm 27 300mm 400 400mm 28 350mm 450 450mm 30 400mm 31 450mm

*1 Abnormal condition

• When there is an abnormality in the LVDT or signal cable (breaking in LVDT wiring, breaking or short circuit in signal cable). • When there is an abnormality in LVDT excitation output (oscillation has stopped).

Input LVDT LS Series Measuring Range See Model Code above Output (isolated) 1 to 5VDC (output resistance: 250Ω) or 4 to 20mADC (permissible load resistance: 600Ω or less)

I/O Conversion Accuracy ±1% of F.S. at 25°C, ±2% of F.S. at 0 to 50°C Deviation from an ideal linear output of voltage or current in combination with LS Series LVDT. However, when measuring range and full range of input LVDT are the same.

Response Speed τ=45ms, 90% response Polarity Can be changed by wiring

Burn-down Function *1 Detects transducer failure and causes the 4 to 20mADC (1 to 5VDC) output to go to less than 0.8mADC (0.2VDC).

T.P. Output (test point output for confirmation null point)

Output 0V when core position is on Null point. Output impedance: 100Ω

Output for LVDT Excitation Voltage: 5Vrms, Frequency: 3kHz, Max. current: 50mA, Sine wave Supply Permissible Voltage 24VDC±10% or 85 to 264VAC/DC (50/60Hz) Power Consumption 24VDC: 3.5W, 100-240VDC: 3.5W, 100-240VAC: 10VA Insulation Resistance 100 MΩ minimum at 500VDC between input-output-power-GND mutually.

Withstanding Voltage 2000VAC for one minute between input-output-power-GND mutually. (With VM-21H: 1,000VAC between output-GND.)

Operating Temperature 0 to 50°C (32 to 122°F REF.) Relative Humidity 10 to 90%RH (no condensation) Casing Material (color) Modified polyphenylene oxide (black) Weight Approx. 110g (0.24lb) CE Marking Only as for 24VDC power supply specifications.

VM-21P - S -

Standard



ATTENTION

Standard specifications, when measuring range and full range of input LVDT are the same. Satisfy the following when using LS Series LVDT :

1 ≦ ≦2

Satisfy the following when using single coil type LVDT except LS Series LVDT : 1)Impedance At 50% (Null point) 500 to 700Ω

(between A and C) Within LVDT stroke More than 400Ω Core comes out Less than 250Ω

2) 4.33 × LVDT sensitivity (mV/mm/V) × Measuring range (mm) ≧1,000

This signal conditioner does not support the zero shift function, so the null point is always the center

position of measurement. Abnormal condition

- When there is an abnormality in the LVDT or signal cable (breaking in LVDT wiring, breaking or short circuit in signal cable).

However, there may be some instances where these conditions will not be detected. -When there is an abnormality in LVDT excitation output (oscillation has stopped).

Burn-down function: The burn-down function is used to reduce output to indicate that the product is not taking measurements. The burn-down function is used in the following situations to reduce output to F.S. –20% (0.8mA DC or 0.2V DC) or lower. When there is an abnormality in the LVDT or signal cable (breaking in LVDT wiring, breaking or short

circuit in signal cable) When there is an abnormality in LVDT excitation output (oscillation has stopped) The delay will be triggered and the burn-down function continued in the following situations. Approximately 10 seconds after a normal input signal is recovered Approximately 10 seconds after the power supply is turned on

Full range of input LVDTMeasuring range



2.2.2 VM-21G Signal Conditioner socket specifications

Terminal screw size M3 Number of signal conditioner mounting stands

1

Operation temperature 0 to 50°C Relative humidity 10 to 90%RH (no condensation) Installation method DIN Rail, Wall-mounted Case material (color) Polyphenylene oxide with glass fiber (black) Mass Approx. 50g (0.11lb)

Terminal Arrangement

Terminal No. Signal

1 INPUT(A) 2 INPUT(B) 3 INPUT(C) 4 5 T.P.OUT－ 6 T.P.OUT＋ 7 OUTPUT＋ 8 GND 9 OUTPUT－

10 SUPPLY＋(L) 11 SUPPLY－(N)

When using above signals, refer to “3.3 Wire connections” ( Page 20)



2.2.3 VM-21H BACKPLANE UNIT (sold separately) specifications

Power supply

1 24VDC 2 100-240VAC/DC

Terminal screw size M3.5

Connector specifications

MASTER: D-Sub25P (socket) Housing lock screws: #4-40 Recommended connector for plug side: DB-25PF-N [Japan Aviation Electronics Industry, Ltd.]

SLAVE: D-Sub25P (socket) Housing lock screws: #4-40 Recommended connector for plug side: DB-25PF-N [Japan Aviation Electronics Industry, Ltd.]

OUTPUT: Panel connector 56P (socket) Recommended connector for plug side: 00-8016-056 [Kyocera Elco Corporation]

Number of signal conditioner mounting stands

8 Max.

Redundant power supply

When selecting the power supply of 24V DC (VM-21H1), it is possible to make the power supply redundant by inputting a secondary 24V DC power supply. However, a redundant AC power supply, or a redundant power supply with input from an AC power supply and a DC power supply are not possible.

Operation temperature 0 to 50°C

Relative humidity 10 to 90%RH (no condensation) Installation method Rack-mounted, wall-mounted Case material (color) SPCC (black) Mass Approx. 2.2kg (4.85lb)

Terminal Arrangement

Terminal No. Signal

1 INPUT(A) 2 INPUT(B) 3 INPUT(C) 4 5 T.P.OUT－ 6 T.P.OUT＋

VM-21H



MASTER, SLAVE, OUTPUT Pin Assignments

MASTER Pin Assignments SLAVE Pin Assignments

Pin Signal Pin Signal PinOUTPUT

connection (Signal )

Pin OUTPUT

connection （Signal ）

1 OUT1 9 OUT5 1 LL (OUT9) 9 f (OUT13) 2 COM1 10 COM5 2 MM (COM9) 10 c (COM13) 3 OUT2 11 OUT6 3 CC (OUT10) 11 Z (OUT14) 4 COM2 12 COM6 4 HH (COM10) 12 U (COM14) 5 OUT3 13 OUT7 5 t (OUT11) 13 P (OUT15) 6 COM3 14 COM7 6 x (COM11) 14 C (COM15) 7 OUT4 15 OUT8 7 j (OUT12) 15 N (OUT16) 8 COM4 16 COM8 8 m (COM12) 16 C (COM16)

17 to 25 17 to 25

OUTPUT Pin Assignments

Pin Signal Pin Signal Pin Signal Pin Signal Pin Signal Pin Signal Pin Signal A K U COM 14 c COM 13 m COM 12 w EE COM 2 B COM 8 L OUT7 V d n x COM 11 FF C COM 16 M OUT8 W OUT6 e OUT5 p OUT3 y HH COM 10D N OUT16 X f OUT13 r z OUT2 JJ E P OUT15 Y h OUT4 s AA OUT1 KK

F COM 7 R Z OUT14 j OUT12 t OUT11 BB OUT9 LL COM 1 H S COM 6 a k u CC OUT10 MM COM 9 J COM 15 T b COM 5 l COM 4 v COM 3 DD NN

Power Supply Terminal Arrangement

Terminal No.

24VDCPower Supply

Specifications

100-240VACPower Supply

Specifications

100-240VDCPower Supply

Specifications 1 ＋ 2 － 3 ＋ L ＋ 4 － N － 5 GND GND GND

<24V DC Power Supply Specifications> <100 to 240V AC/DC Power Supply Specifications>



2.2.4 VM-21H BACKPLANE UNIT (sold separately) Expansion Specifications

The output signal from an expansion backplane unit can be output from the first backplane unit.

D-Sub25P Cable Specifications D-Sub25P D-Sub25P

(plug) (plug) 1 ― 1 2 ― 2 3 ― 3

25 ― 25 (straight connection)

OUTPUT Cable Pin Assignment Backplane Unit A Backplane Unit B

Pin SLOT No. Signal Name Pin SLOT No. Signal Name AA OUT1 BB OUT9 KK ― NN ― LL

SLOT 1 COM1 MM

SLOT 1 COM9

z OUT2 CC OUT10 DD ― JJ ― EE

SLOT 2 COM2 HH

SLOT 2 COM10

p OUT3 t OUT11 u ― y ― v

SLOT 3 COM3 x

SLOT 3 COM11

h OUT4 j OUT12 k ― n ― l

SLOT 4 COM4 m

SLOT 4 COM12

e OUT5 f OUT13 a ― d ― b

SLOT 5 COM5 c

SLOT 5 COM13

W OUT6 Z OUT14 R ― V ― S

SLOT 6 COM6 U

SLOT 6 COM14

L OUT7 P OUT15 E ― K ― F

SLOT 7 COM7 J

SLOT 7 COM15

M OUT8 N OUT16 A ― D ― B

SLOT 8 COM8 C

SLOT 8 COM16

Backplane Unit A

Backplane Unit B (expansion)

•••

•

SLOT 1 SLOT 6 SLOT 7 SLOT 2 SLOT 3 SLOT 4 SLOT 5 SLOT 8

SLOT 1 SLOT 6 SLOT 7 SLOT 2 SLOT 3 SLOT 4 SLOT 5 SLOT 8



2.3 External Dimensions and Part Names

2.3.1 Product External Dimensions and Part Names

2.3.2 VM-21G Signal Conditioner socket External Dimensions and Part Names

Units: mm

Zero Adjustment Potentiometer

Span Adjustment Potentiometer Installation

Screw

Units: mm Mounting hole Input Terminal

DIN Rail

Output / Power Supply Terminal



2.3.3 VM-21H BACKPLANE UNIT (sold separately) External Dimensions and Part Names

Units: mm

Mounting hole Input Terminal Input Terminal

Power Supply Terminal

Section 3 Installation


ATTENTION


Installation, wiring, and wire connections should be performed by a qualified technician.

Be sure to install an earth wire. In addition, DO NOT turn on the power before all wiring and wire connection work is complete. Doing so could result in electric shock.

Before touching this product, be sure to touch a nearby metal area connected to ground to discharge any static electricity. Failure to do so could cause this product to be damaged by static electricity that has built up in your body.

Make sure that all wiring has been connected correctly before turning the power on. Failure to do so could result in damage to the product or fire.

Install this product away from motors and relays. In addition, do not install the input and output signal cables near electrical cables or control cables. Noise from motors and relays could adversely affect the product. It is recommended that wiring ducts be kept separate.

When using shielded cable, keep the length of unshielded areas as short as possible. (less than 100mm recommended) Otherwise, the signal may become unstable.

When installation work is complete, be sure to check the installation conditions. Check carefully to make sure the product will not fall and trouble.

Point VM-21G Signal Conditioner socket is abbreviated as “signal conditioner socket”. VM-21H Backplane Unit (sold separately) is abbreviated as “Backplane Unit”.

WARNING



3.1 Installation environment

Install this product in a location that satisfies the following environment and installation conditions.

Point VM-21G Signal Conditioner Socket is abbreviated as “signal conditioner socket”. VM-21H Backplane Unit (sold separately) is abbreviated as “Backplane Unit”.

Environment Conditions Ambient

temperature: 0 to 50°C when the equipment is operational

Ambient humidity:

10 to 90％RH (no condensation) when the equipment is operational

Vibration: 2m/s or less at 10 to 150Hz Air

cleanliness: An air dust volume of 0.2mg/m3 or less is preferred. In addition, there should be very little corrosive gas, such as hydrogen sulfide, zincate gas, and chlorine, and electrically conductive particles, such as iron and carbon. (The tolerable levels of hydrogen sulfide and zincate gas are based on JEIDA-63.)

JEIDA: Japan Electronics and Information Technology Industries Association JEIDA-63 Hydrogen sulfide: 0.01ppm or less Zincate gas: 0.05ppm or less (Ambient temperature: 25°C ± 5°C, Humidity: 40 to 80％RH)

Installation Conditions Refer to the illustrations below to maintain the required spacing. This product is installed

using either a signal conditioner socket or a backplane unit. To install this product in a cabinet, it needs to be cooled with a forced-air cooling apparatus. Do not install this product on a heat-generating object. If there is a bottom plate underneath, maintain at least 100mm of distance from the bottom

plate.



If there is a wall or other object behind the product, leave at least 60mm of distance.

Using a signal conditioner socket for installation

Using a backplane unit for installation

Air-cooling fan or exhaust opening

100mm or more

Air-cooling fan or exhaust opening

100mm or more

128mm or more

78mm or more



3.2 Installing the product

Use one of the following methods to install the product. Install the product as appropriate, maintaining the required space indicated in the installation conditions. Use a signal conditioner socket to install the product to a wall. ( Page 17) Use a signal conditioner socket to install the product to a DIN rail. ( Page 18) Use a backplane unit to install the product to a rack or wall. ( Page 19)

3.2.1 Using a signal conditioner socket for installation

You can use a signal conditioner socket to install this product to a wall or DIN rail. Wall Installation Use the following installation procedure.

1 Install the signal conditioner socket to the wall.

2 Wire the signal conditioner socket, and then install the product to the signal conditioner socket.

Installation screw Units: mm

Installation Dimensions



DIN Rail Installation Use the following installation procedure.

1 Fit the upper tabs on the back of the signal conditioner socket into the DIN rail.

2 Pull the slide lock while pushing the signal conditioner socket onto the DIN rail.

3 Make sure the upper tabs and slide lock have clamped onto the DIN rail.

4 Fix the DIN rail.

5 Wire the signal conditioner socket, and then install the product to the signal conditioner socket.

Point The signal conditioner socket can be removed by using a flathead screwdriver to push the slide lock down.

DIN rail

Upper tab

Slide lock

DIN rail

DIN rail

Installation screw



3.2.2 Using a backplane unit for installation

You can use a backplane unit to install the product closely appressed to a wall or 19-inch rack panel. Use the following installation procedure.

1 Install the backplane unit onto the installation angles or the wall.

2 Wire the backplane unit, and then install the product to the backplane unit.

Installation angle

Installation screw

Units: mm

Installation Dimensions



3.3 Wire connections

Wiring and wire connections should be performed by a qualified technician.

Be sure to install an earth wire. In addition, DO NOT turn on the power before all wiring and wire connection work is complete. Doing so could result in electric shock.

Make wire connections in the following order. 1. Connect the transducer. 2. Connect the output signal receiver. 3. Connect the power supply. 4. Check all connections.

Point Flexible, stranded electrical wire is recommended for wiring. Round, crimped terminals (JIS C 2805, or similar) with good contact and resistant to degradation over time are recommended.

3.3.1 Connecting the transducer

Connect the transducer as explained below. Point It is recommended that you use a 0.75 to 2mm2 3-wire shielded cable

between the signal conditioner socket and junction terminal, or backplane unit and junction terminal.

It is recommended that non-shielded areas be kept to a length of no more than 100mm.

WARNING



When using a signal conditioner socket (using LS-C)

Point Connect a shield of wire cable to signal line (C) in the signal conditioner side.

LS-C PIN SYMBOL

WIRE NAME

VM-21G TERMINAL NO.

A A 1BCDE

BC

23

3Shield



ATTENTION

Ａ

When using a signal conditioner socket (using LS-T)

In case of specification of reverse polarity , doth connect the NO.1 terminal of conditioner of C terminal of LVDT and the NO.3 terminal of conditioner of A terminal of LVDT.

Refer to ( Page 29) on polarity.

In addition , connect a shield to the terminal NO.3 by all means.

Point Connect a shield of wire cable to signal line (C) in the signal conditioner side.

LS-T TERMINAL SYMBOL

WIRE NAME

VM-21G TERMINAL NO.

A A 1BC

BC

23

Shield 3

Ｂ

Ｃ



When using a backplane unit (using LS-C)

Point When connecting to slots 2 through 8, connect in the same way as Slot 1.

Connect a shield of wire cable to signal line (C) in the signal conditioner side.

LS-C PIN SYMBOL

WIRE NAME

VM-21H TERMINAL NO.

A A 1 BCDE

BC

2 3

3 Shield



When using a backplane unit (using LS-T)

Point When connecting to slots 2 through 8, connect in the same way as Slot 1.

Connect a shield of wire cable to signal line (C) in the signal conditioner side.

ＢＣＡ

LS-T TERMINAL SYMBOL

WIRE NAME

VM-21H TERMINAL NO.

A A 1 BC

BC

2 3

Shield 3



3.3.2 Connecting the output signal receiver

Connect the output signal receiver as explained below.

Point Tool-grade vinyl code (VSF) stranded wire (JIS C 3306, or similar) with a nominal conductor sectional area of 0.5 to 0.75mm2, or similar product, is recommended for signal wire.

When using a signal conditioner socket

When using a backplane unit

Point To expand the backplane unit, refer to “2.2.4 VM-21H BACKPLANE UNIT (sold separately) Expansion Specifications” ( Page 11).

Output signal receiver

Output signal receiver



3.3.3 Connecting the power supply

Connect the power supply as explained below.

Point 600V vinyl code (IV) stranded wire (JIS C 3307, or similar) with a nominal conductor sectional area of 1.25 to 2.0mm2, or similar product, is recommended for electric wire.



<24V DC power supply specifications>

Connect wires as shown in figure when the redundant is necessary for the power supply. But,there is not priority to ①,②. Connect either ① or ② with power supply when the redundant is not necessary .

<100 to 240V AC/DC power supply specifications>



3.3.4 Checking connections

Check the following before turning on the power supply. Make sure there is no looseness in connection terminals, and that all wiring has been

connected correctly. Make sure that the wiring for the power supply is connected to one of the power supplies

indicated below. 24V DC power supply specifications: 24VDC ± 10％ 100-240V AC/DC power supply specifications: 85 to 264VAC/DC

Make sure the product is installed in a location that satisfies the installation environment requirements. In particular, make sure there are no flaws in the installation of the product, and that it has not been installed in any of the following types of areas. - Areas with high temperature or high humidity - Areas with a large amount of dust - Areas susceptible to vibration

This completes the installation of the product. Make corrections as necessary after assembling this product with other instrumentation. ( Page 28) Point The output of this product might overshoot , when the power supply is torned on. Be afraid of need , please establish a safe system.

Section 4 Corrections


ATTENTION


To maintain the performance of this product, make corrections in the following instances. When turning on the power supply for the first time When 1 year has passed since the previous correction When the performance of the product has dropped for some reason

4.1 Correction preparations

The T.P. output signal is not insulated from the input signal.

The common for the T.P. output signal should be insulated from the ground to prevent noise.

Place a T.P.output signal receiver as shown below, and make corrections. Refer to “4.2 Correcting the product” ( Page 29) for the procedure for making corrections.



Point The example in the illustration shows a connection to Slot 1. If a connection is made to a different slot, make connections in the same way to terminals 5 and 6.

Digital multimeter

Digital multimeter



4.2 Correcting the product

Use the following procedure to make corrections.

Point The product has a zero shift function (approx. 25%).

The measurement range of this product is always centered on the null point.

If corrections are completed successfully, the input/output conversion precision indicated in the specifications will be met within approximately 5 minutes after the next time the power supply is turned on. If the product does not operate correctly according to the specifications, contact the sales office where it was purchased for assistance.

1 Turn on the power supply.

2 Move the LVDT core so that the T.P. output becomes 0.00V.

3 Adjust the zero adjustment volume until the output is 3V or 12mA.

4 Move the LVDT core to the 100% position on the measuring range.

5 Adjust the span adjustment volume until the output is 5V or 20mA.

6 Repeat steps 2 through 5 until the I/O conversion precision satisfies the values indicated in the specifications.

Zero adjustment Potentiometer

Span adjustment Potentiometer

Extension rod-end toward LVDT

Extension rod-end away from LVDT

Direct Polarity

Reverse Polarity

Increase

Increase Decrease

Decrease

Section 5 Maintenance and Inspections


Section 5 Maintenance and Inspections

The maintenance and inspections for this product are explained in this section.

5.1 Regular inspections

Recommend corrections once annually to maintain product performance and ensure system stability. Refer to “Section 4 Corrections” for more information about the procedure for performing corrections. ( Page 28)

5.2 Product life

As long as there are no abnormalities with the product, in the case of using in room temperature (25°C), it should have a recommended service life of 10 years. Product life decrease as room temperature increases.

Point Service life may be shorter than 10 years due to the surrounding environment. To ensure system stability, it is recommended to replace the product earlier when necessary.

5.3 Troubleshooting

Solutions for possible trouble with this product are described below.

Symptom Possible Cause Solution The power supply is not turned on.

Turn on the power supply.

Cable or Connection of LVDT is breaking.

Confirm connection of cable or LVDT.

Output dose not out more than 10 seconds.

Wires have not been connected correctly.

Refer to “Section 3.3 Connecting wires” to connect wires correctly. ( Page 20)

Core of LVDT drop out. Confirm LVDT. Input/output conversion precision is not in line with the specifications. Corrections have not

been performed correctly.

Refer to “Section 4 Corrections” to perform corrections. ( Page 28)

Warranty Provisions The warranty for this product is as follows. 1. Warranty conditions for newly delivered products

The warranty periods for delivered products shall be 3 years from the date they are shipped from Shinkawa Sensor Technology, Inc. (The warranty period for special products and software shall be 1 year.) If Shinkawa liable for a fault in a Shinkawa product that occurs during this warranty period, the replacement and/or repair of that product shall be performed at a Shinkawa factory at Shinkawa’s expense. In addition, if it becomes necessary to send a technician to perform repairs during the warranty period, Shinkawa shall covercharge travel expenses based on Shinkawa regulations. In addition, such cases, repair fees shall be provided by Shinkawa. However, the following situations do not apply, and are excluded from warranty.

(1) Inappropriate use and/or operation by the user (2) Faults attributable to some other cause for which Shinkawa is not liable (3) Modifications or repairs performed by someone other than Shinkawa or personnel

comissioned by Shinkawa (4) Operation, storage, and/or use in a severe environment that exceeds the design

specifications (5) Fire, flood, earthquake, lightening, or other natural disaster (6) Consumable (7) Any other fault for which Shinkawa is not liable

Warranty as used herein is limited to the individual product that has been delivered; Shinkawa shall be exempt from any liability regarding damage caused either directly or indirectly as a result of a fault in a delivered product. Notwithstanding the warranty provisions hereto, the manufacturer’s of all other equipmentall parts manufacturers other than Shinkawa shall be liable for the warranty periods and provisions of suchtheir own equipment.

2. Warranty conditions for repaired products The warranty period for repaired products shall be for a period of 6 months after the repair is complete, and shall be limited to the areas repaired. All other conditions shall be as stipulated in Article 1, above.

Hiroshima Factory4-22 Yoshikawa-kogyodanchi, Higashi-hiroshima 739-0153, JapanTel. +81-82-429-1118 Fax. +81-82-429-0804 [Field support & Repair Dept] E-Mail : [email protected]

Documents

VM-21P 3-WIRE LVDT SIGNAL CONDITIONER INSTRUCTION · PDF file · 2017-09-22VM-21P 3-Wire LVDT Signal Conditioner Instruction Manual Thank you for purchasing the VM-21 Series VM-21P