YOKOGAWA Juxta VJA1 User Manual

User's
Model VJA1
Distributor
Manual
(Isolated Single-output and
Isolated Dual-output Types)
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 VJA1 Distributor (User's Manual)
Model VJA1 Distributor (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 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:
• VJA1: 1 unit
Standard Accessories:
• Tag number label: 1 sheet
• User's manual (IM 77J01A01-01E, this manual): 1 copy
• User's manual (IM 77J01A00-91Z1): 1 copy
IM 77J01A01-01E
5th Edition June 2018 (YK)
Doc. Number
IM 77J01A01-01E
(This manual)
GS 77J01A01-01E
1
2-9-32, Naka-cho Musashino-shi, Tokyo 180-8750 Japan
Phone: +81-422-52-7179 Facsimile: +81-422-52-6793
You can download the latest manuals from the following website:
http://www.yokogawa.com/ns/juxta/im/

GENERAL

The VJA1 is a compact, plug-in type distributor that is used
in combination with a two-wire type transmitter to convert the
transmitter's 4 to 20 mA DC signals into isolated DC current or
DC voltage signals.
• HART communication: VJA1/H (option code /H)
Bi-directional relay of HART communication signals is possible
while the field devices and the higher-level device are isolated
from each other.

MODEL AND SUFFIX CODES

Model Suffix codes
VJA1 -0 x x -A x x
Fixed code -0
1
Output
2
6
Power supply
7
-A
Input signal
A
B
C
D
E
F
G
Output-1 signal 1
2
3
4
5
6
7
Z
A
6
Output-2 signal
N
Z
Fixed code
Option
*1: Operating range: 85 to 264V
*2: Operating range: 12 to 36V
*3: DC voltage signal or DC current signal
*4: When option code /C0 or /FB is specified, the conformity to the safety
and EMC standards is excluded. CE marking is not applicable.
*5: When option code /H is specified, the output-1 signal code is "A" (4 to
20 mA DC) only.
Description
0 /x Distributor
Always -0
1 output
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
4 to 20 mA DC
2 to 10 mA DC
1 to 5 mA DC
0 to 20 mA DC
0 to 16 mA DC
0 to 10 mA DC
0 to 1 mA DC
0 to 10 mV DC
0 to 100 mV DC
0 to 1 V DC
0 to 10 V DC
0 to 5 V DC
1 to 5 V DC
−10 to +10 V DC
Custom order
*3
4 to 20 mA DC
1 to 5 V DC
No output-2
Custom order
*3
0 Always 0
No socket (with socket if not
/SN
specified)
/C0 Coating
*4
/FB Fuse bypass
*4
/H
With HART communication
*5