YOKOGAWA JUXTA VJH1 User Manual

User's
Model VJH1
Isolator
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 VJH1 Isolator (User's Manual)
Model VJH1 Isolator (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:
• VJH1: 1 unit
Standard Accessories:
• Tag number label: 1 sheet
• Shunt resistor (for current input *): 1 piece
* Excluding option codes /C and /HC.
• User's manual (IM 77J01H01-01E, this manual): 1 copy
• User's manual (IM 77J01A00-91Z1): 1 copy
IM 77J01H01-01E
7th Edition Aug. 2020 (YK)
Doc. Number
IM 77J01H01-01E
(This manual)
GS 77J01H01-01E
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
This plug-in type isolator converts DC current or DC voltage
signals into isolated DC current or DC voltage signals.
• With OOP: VJH1/C (Option code /C)
When the load circuit opens (OOP: output open), input
resistance increases rapidly to 48kΩ or more so as to detect
the open state through the input device.
• With OOP (HART communication):
VJH1/HC (Option code /HC)
In addition to the load circuit open (OOP) detection function,
HART communication signals are relayed bidirectionally with
the field device and host device isolated.