YOKOGAWA VJRK User Manual

User's
Model VJRK
Limit Alarm
Manual
for RTD Input
Thank you for purchasing the JUXTA Signal Conditioner.
Please read through this manual before use for correct handling.
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 specifications are shown in the
table below.
Doc. Name
Precautions on the Use of the JUXTA Series (User's Manual) IM 77J01A00-91Z1
Model VJRK Limit Alarm for RTD Input (User's
Manual)
Model VJRK Limit Alarm for RTD Input (General
Specifications)
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.
CHECKING THE PRODUCT SPECIFICATIONS
AND THE CONTENTS OF THE PACKAGE
(1) Model and Specifications Check
Check that the model and specifications 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:
• VJRK: 1
Standard Accessories:
• Tag number label: 1 sheet
• Range label: 1 sheet
• User's manual (IM 77J01R21-01E, this manual): 1 copy
• User's manual (IM 77J01A00-91Z1): 1 copy
GENERAL
This plug-in type Limit Alarm for RTD input receives RTD signal.
• Each parameter setting can be changed using a PC (VJ77 PC-
based Parameters Setting Tool) or the Handy Terminal (JHT200 ).
IM 77J01R21-01E
3rd Edition Feb. 2017 (YK)
Doc. Number
IM 77J01R21-01E
(This manual)
GS 77J01R21-01E
1
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/

MODEL AND SUFFIX CODES

Model Suffix codes
VJRK -0 2 x -x T 0
Fixed
-0
code
Output
2
configuration
6
Power supply
7
-1
-2
Input signal
-3
-4
Output signal T
Fixed code 0
Fixed code
Option
*1: Operating range: 85 to 264V AC/DC
*2: Operating range: 12 to 36V DC
*3: DC voltage signal or DC current signal
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-fixing 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-fixing screw.
Socket
Main unit
Main
unit-fixing
screw
Hole for main
unit-fixing screw
Description
0 /x Limit Alarm for RTD Input
Always -0
2 outputs
100-240 V AC/DC
*1
15-30 V DC
*2
Pt100 (ITS-90)
JPt100 (JIS'89)
Pt50 (JIS'81)
Pt100 (IPTS-68)
Alarm output (2 relay contacts)
Always 0
0 Always 0
/SN No socket (with socket if not specified)
/C0 HumiSeal coating
/FB Fuse bypass
/DF Fahrenheit display function
Unit: mm
<Mounting Dimensions>
29.5 or more
2-M4 or
2-ø4.5 or more
22±0.2
Mounting
screws