Yokogawa VJUK Specifications

User’s Manual

Model VJUK Limit Alarm for Universal Input

Thank you for purchasing the JUXTA Signal Conditioner. Please read through this manual before use for correct handling.

IM 77J01U21-01E

3rd Edition: Mar. 2021

2-9-32, Naka-cho Musashino-shi, Tokyo 180-8750 Japan

You can download the latest manuals from the following website:

http://www.yokogawa.com/ns/juxta/im/

CAUTIONARY NOTES FOR SAFE USE OF THE PRODUCT

This User’s Manual should be carefully read before installing

and operating the product. Please keep this User’s Manual for future reference.

For more information of the safety precautions, please refer to the “Precautions on the Use of the JUXTA Series (IM 77J01A00-91Z1)”.

The related manuals and general specications

are shown in the table below.

Precautions on the Use of the JUXTA Series (User’s Manual) Model VJUK Limit Alarm for Universal Input (User’s

Manual)

Model VJUK Limit Alarm for Universal Input (General

Specifications)

Doc. Name Doc. Number

IM 77J01A00-91Z1 IM 77J01U21-01E

(This manual)

GS 77J01U21-01E

User’s manuals in the above table are essential parts of the

product; keep it in a safe place for future reference. This manual is intended for the following personnel;

• Engineers responsible for installation, wiring, and maintenance

of the equipment.

• Personnel responsible for normal daily operation of the

equipment.

The following symbol is used on the product and in this manual to

ensure safe usage.

WARNING

Calls attention to actions or conditions that could cause serious or fatal injury to the user, and indicates precautions that should be taken to prevent such occurrences.

CAUTION

Calls attention to actions or conditions that could cause injury to the user or damage to the instrument or property and indicates precautions that should be taken to prevent such occurrences.

QR Code

The product has a QR Code pasted for e󰀩cient plant

maintenance work and asset information management.

It enables conrming the specications of purchased products

and user’s manuals.

For more details, please refer to the following URL.

https://www.yokogawa.com/qr-code

* QR Code is a registered trademark of DENSO WAVE

INCORPORATED.

CHECKING THE PRODUCT SPECIFICATIONS AND THE CONTENTS OF PACKING

(1) Model and Specications Check Check that the model and specications indicated on the

nameplate attached to the side face of the main unit are as

ordered. (2) Contents of the Package Check that the package contains the following items:

• VJUK: 1 unit

Standard Accessories:

• Tag number label: 1 pc.

• Range label: 1 sheet (when model code 1 or 3 is specied)

• RJC sensor (A1167HT): 1 pc. (when optional code RJCN is

not specied) (when model code 3 is specied)

• Input resistor (shunt resistor): 1 pc. (100 Ω: E9786WD) (when model code 1 and input signal A are specied)

• Input resistor (shunt resistor): 1 pc. (100 Ω: E9786WD) (when the /R100 option is specied)

• Input resistor (shunt resistor): 1 pc. (250 Ω: E9786WE) (when the /R250 option is specied)

• User’s manual (IM 77J01U21-01E, this manual): 1 copy

• User’s manual (IM 77J01A00-91Z1): 1 copy

GENERAL

The VJUK is a plug-in type alarm setting device that receives voltage/current, thermocouple/RTD, or mV signal as an input signal.

• Various parameters can be changed from a PC (VJ77).

MODEL AND SUFFIX CODES

Model Su󰀩x codes Description

VJUK -x 2 x -x T 0 0 /x Limit Alarm for Universal Input

Model code

Output

conguration

Power supply

Input signal

Output signal T

Fixed code 0 Always 0 Fixed code 0 Always 0

Option

*1: Input signal can be selected from 6, A, and U. *2: Input signal is xed to A. *3: Input signal is xed to U. *4: Operating range: 85 to 264V AC/DC *5: Operating range: 12 to 36V DC *6:

*7: When option code /C0 or /FB is specied, the conformity to the safety

*8: The /RJCN option can be selected when the model code is 3. *9:

-1

-2

-3 Temperature input type

2 2 outputs

6 100-240 V AC/DC 7 15-30 V DC

-6 1 to 5 V DC

-A 4 to 20 mA DC

-U

When the model code is 1, the input signal is voltage and current.

When the model code is 3, the input signal is thermocouple, RTD, and mV signal.

and EMC standards is excluded. CE marking is not applicable.

The /R100 and /R250 options can be selected when the input signal is U.

Note: An exclusive User’s Manual might be attached to the

products whose su󰀩x codes or option codes contain the code “Z” (made to customers’ specications). Please read it along

with this manual.

DC input type (voltage and

current input)

DC current input type (with transmitter power supply)

Thermocouple, RTD, or mV signal; voltage or current Alarm output (2 relay contact

points)

No socket (with socket if not

/SN

specied)

/C0 HumiSeal coating /FB Fuse bypass

No RJC sensor (with RJC

/RJCN

sensor if not specied)

/R100 With 100 Ω input resistor /R250 With 250 Ω input resistor /DF Fahrenheit display function

4.5 or more

Mounting Dimensions

Main unit-fixing screw

Main unit

DIN rail

Slide lock

Fit into here

Recommended crimp-on

1. MOUNTING METHODS

CAUTION

● Plug/disconnect the main unit into/from the

socket vertically to the socket face. Otherwise the terminals may bend and it may cause bad contact.

● The converter shall not tilt 5 degrees or more in

either direction when installed.

● When the converter is not connected to the socket,

it is necessary to protect the socket against ingress of dust to the connector part.

● Keep this product in a conductive bag when

plugged out, during transport or storage.

1.1 Wall Mounting

Loosen the main unit-xing screw to disconnect the main unit from the socket. Next, anchor the socket onto the wall with screws. Then, plug the main unit into the socket and secure the main unit with the main unit-xing screw.

Mounting screws

Threaded hole for fixing the main unit

Socket (Part no.: T9093FL)

59±0.3

29.5 or more

22±0.2

2-M4 or 2-ø

Unit: mm

1.2 DIN Rail Mounting

Locate the VJUK so that the DIN rail ts into the upper part of the DIN-rail groove at the rear of the socket, and fasten the socket

using the slide lock at the lower part of the socket.

DIN rail

Push

(Rear of socket)

Socket (Part no.: T9093FL)

1.3 Mounting Using a Multi-mounting Base

For mounting using a multi-mounting base, see the user’s manual for VJCE (VJ Mounting Base).

1.4 Using a Duct

Wiring duct should be installed at least 30 mm away from the top

and bottom faces of the main unit.

2. INSTALLATION AND ENVIRONMENTAL CONDITIONS

• Avoid the following environments for installation locations: Areas with vibrations, corrosive gases, dust, water, oil, solvents, direct sunlight, radiation, a strong electric eld, and/or a strong magnetic eld, direct radiant heat, wind, temperature uctuation, 2,000 m or more above sea level,

outdoors.

• If there is any risk of a surge being induced into the power line

and/or signal lines due to lightning or other factors, a dedicated

lightning arrester should be used as protection for both the

product and a eld-installed device.

• Use indoors at an altitude of 2000 m or less.

• Operating temperature/humidity range: -10 to 55°C (-10

to 45°C for side-by-side mounting*)/5 to 90%RH (no

condensation)

* If the previous model (style S3.xx earlier) is installed

together, the ambient temperature is 0 to 40°C.

• Continuous vibration: (at 5 to 9 Hz) Half amplitude of 3 mm or less (at 9 to 150 Hz) 9.8m/s2 or less, 1 oct/min for 90 minutes

each in the three axis directions

• Impact: 98 m/s2 or less, 11 ms, 3 axes, 6 directions, 3 times each

3. EXTERNAL WIRING

WARNING

● To avoid the risk of an electric shock, turn o󰀨 the

power supply and use a tester or similar device to ensure that no power is supplied to a cable to be connected, before carrying out wiring work.

● Do not operate the product in the presence of

ammable or explosive gases or vapors. To do so is highly dangerous.

● Use of the product ignoring the specications may

cause overheating or damage. Before turning on the power, ensure the following:

• Power supply voltage and input signal value

applied to the product should meet the required

specications.

• The external wiring to the terminals and wiring to

ground are as specications.

Wiring should be connected to the terminals on the socket of

the product. The terminals for external connections are of M3

screws. Use crimp-on terminal lugs for connections to the

terminals.

• Recommended cables: A nominal cross-sectional area of

Input signal (when the model code is 1)

0.5 mm

or thicker for signal cables, and that of 1.25 mm2 or

thicker for power cables.

Input signal

Input

DC voltage/ current standard

R: precision resistor for current output

Power supply

GND

RJC sensor (for thermocouple input)

Signal line

RJC sensor

Terminal screw

L+

N−

(when the model code is 2)

When using internal power

supply

Transmitter

–

3 2

789

1011

When using external power supply

PS+

Transmitter

–

COM

Input signal (when the model code is 3)

−

Make the wiring resistance of RTD input terminals 1and 3 the same.

Alarm-2 signal

Alarm output

ALM2

(N.O)

COM

Alarm-1 signal

Alarm output

ALM1

(N.O.)

COM

lug size

5.5 or less

–

RTD

(Unit: mm)

When using as an isolator

Transmitter

–

Thermocouple

CAUTION

● Connect the RJC sensor at the correct position as

shown above. Otherwise temperature cannot be measured correctly.

● Connect the RJC sensor so that it overlaps the input

signal line.

● Handle the RJC sensor lead with care to prevent

disconnection.

● The power line and input/output signal lines should

be installed away from noise-generating sources. Otherwise accuracy cannot be guaranteed.

● Make sure to earth ground the ground terminal

through minimum resistance. The length and thickness of the grounding cable should be as short and thick as possible. Directly connect the lead from the ground terminal (terminal no. 8) of the product to the ground. Do not carry out daisychained inter-ground terminal wiring.

COM

−

RJC

ø3.2 to 3.5

5.5 or more

IM 77J01U21-01E 3rd Edition

+ 4 hidden pages