Model VJA7
Distributor
(Multi-function)
(Isolated Single-output and
Isolated Dual-output Types)
IM 77J01A07-01E
5th Edition Aug. 2020
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 VJA7 Distributor (User’s Manual)
IM 77J01A07-01E
(This manual)
Model VJA7 Distributor (General Specifications)
GS 77J01A07-01E
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.
CHECKING PRODUCT SPECIFICATIONS
AND THE CONTENTS OF PACKING
(1) Model Number and Specification Check
Check that the model number and specifications shown on the
nameplate attached on the side of the product are as ordered.
(2) Contents of the Packing
Check that the packing contains the following items:
•
VJA7: 1 unit
Standard Accessories:
•
Tag number label: 1 sheet
•
User’s manual (IM 77J01A07-01E, this manual): 1 copy
•
User’s manual (IM 77J01A00-91Z1): 1 copy
GENERAL
This distributor, which belongs to the JUXTA series of signal
conditioners, receives 4 to 20 mA DC signals from two-wire
transmitters while supplying power to transmitters and converting
the received signal to pairs of isolated current and voltage signals.
•
Output-2 signal is selectable from a DC voltage signal, DC
current signal, communication function (RS-485), and alarm
output (two relay contacts). (Isolated Dual-output Type)
•
Various parameters can be set and modified using a PC
(VJ77 (sold separately)) or Handy Terminal (JHT200 (sold
separately)) and the like.
MODEL AND SUFFIX CODES
Model
Suffix codes
Description
VJA7
-0
x x
-A
x x
0
/x
Distributor (Multi-function)
Fixed
code
-0
Always -0
Output
configuration
1
1 output
2
2 outputs
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-1 signal
A
4 to 20 mA DC
6
1 to 5 V DC
Z
(Custom order)
*3
Output-2 signal
A
4 to 20 mA DC
6
1 to 5 V DC
P
Communication function (RS485)
T
Alarm output (2 relay contacts)
N
No output-2
Fixed code
0
Always 0
Option
/SN
No socket (with socket if not specified)
/C0
HumiSeal coating
*4
/FB
Fuse bypass
*4
*1: Operating range: 85 to 264V AC/DC
*2: Operating range: 12 to 36V DC
*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.
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.
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
http://www.yokogawa.com/ns/juxta/im/
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