YOKOGAWA JUXTA VJAK User Manual

User's
Model VJAK
Limit Alarm
Manual
for DC Current 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 VJAK Limit Alarm for DC Current Input (User's
Manual)
Model VJAK Limit Alarm for DC Current 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.
QR Code
The product has a QR Code pasted for efficient plant
maintenance work and asset information management.
It enables confirming the specifications 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 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 Packing
Check that the package contains the following items:
• VJAK: 1
Standard Accessories:
• Tag number label: 1 sheet
• User's manual (IM 77J01A21-01E, this manual): 1 copy
• User's manual (IM 77J01A00-91Z1): 1 copy
IM 77J01A21-01E
3rd Edition June 2022 (YK)
Doc. Number
IM 77J01A21-01E
(This manual)
GS 77J01A21-01E
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/
GENERAL
This plug-in type Limit Alarm for DC current input receives 4 to
20 mA DC current signal. It is used in combination with two-wire
type transmitter.
• Each parameter setting can be changed using a PC (VJ77
PC-based Parameters Setting Tool).
MODEL AND SUFFIX CODES
Model Suffix codes
VJAK -0 2 x -A T 0
Fixed
-0
code
Output
2
configuration
6
Power supply
7
Input signal -A
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.
Description
0 /x Limit Alarm for DC Current Input
Always -0
2 outputs
100-240 V AC/DC
*1
15-30 V DC
*2
4 to 20 mA DC
(Transmitter power supply:
25.25 ± 0.25 V DC)
Alarm output (2 relay contacts)
Always 0
0 Always 0
No socket (with socket if not
/SN
specified)
/C0 HumiSeal coating
/FB Fuse bypass