User’s
Manual
1
Thank you for purchasing the JUXTA Signal Conditioner.
Please read through this manual before use for correct handling.
2-9-32, Naka-cho Musashino-shi, Tokyo 180-8750 Japan
Phone: +81-422-52-7179 Facsimile: +81-422-52-6793
http://www.yokogawa.com/ns/juxta/im/
You can download the latest manuals from the following website:
IM 77J01A04-01E
4th Edition Apr. 2021 (YK)
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
Doc. Number
Precautions on the Use of the JUXTA Series (User’s Manual) IM 77J01A00-91Z1
Model VJA4 Distributor (User’s Manual)
IM 77J01A04-01E
(This manual)
Model VJA4 Distributor (General Specifications)
GS 77J01A04-01E
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 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 PRODUCT SPECIFICATIONS
AND PACKAGE
(1) Checking the Model and Product Specifications
Check that the model and specifications indicated on the
nameplate attached to the main unit are as ordered.
(2) Packaged Items
Check that the package contains the following items:
•
VJA4: 1 unit
Standard Accessories:
•
Tag number label: 1 sheet
•
User’s manual (IM 77J01A04-01E, this manual): 1 copy
•
User’s manual (IM 77J01A00-91Z1): 1 copy
GENERAL
This plug-in type distributor is used in combination with 2-wire
type transmitters and converts 4 to 20 mA DC signals into DC
current or DC voltage signals.
The input/output signal is non-isolated.
• 1-channel or 2-channel type can be selected.
MODEL AND SUFFIX CODES
Model
Suffix codes
Description
VJA4
-0
x x
-A
x
N 0
/x
Distributor (Non-isolated)
Fixed code
-0
Always -0
Output
1
1-channel
2
2-channel
Power supply
6
100-240 V AC/DC
*1
7
15-30 V DC
*2
Input signal
-A
4 to 20 mA DC
Transmitter power supply:
25.25±0.25 V DC
Output signal
A
4 to 20 mA DC
6
1 to 5 V DC
Fixed code
N
Always N
Fixed code
0
Always 0
Option
/SN
No socket (with socket if not
specified)
/C0
Coating
*3
/FB
Fuse bypass
*3
*1: Operating range: 85 to 264 V AC/DC
*2: Operating range: 12 to 36 V DC
*3: When option code /C0 or /FB is specified, the conformity to the safety
and EMC standards is excluded. CE marking is not applicable.
Note: An exclusive User’s Manual might be attached to the
products whose suffix codes or option codes contain the code
“Z” (made to customers’ specifications). Please read it along
with this manual.
Model VJA4
Distributor (Non-isolated)
(1-channel and 2-channel Types)
