YOKOGAWA VJQ8 Instruction Manual
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Instruction
Manual
Model VJQ8
Pulse/ Analog Transmitter
IM 77J01Q08-01E
IM 77J01Q08-01E
1st Edition Feb. 2000
Yokogawa M&C Corporation
Kojimachi Tokyu Bldg. (3F)
Kojimachi 6-6 Chiyoda-ku, Tokyo, 102 Japan
Tel: 81-3-3239-0576 Fax: 81-3-3239- 0585
1. CAUTIONARY NOTES FOR SAFE
USE OF THE PRODUCT
For the correct use of this product, read through this manual before
use. The following safety symbol is indicated on the product to en-
sure safe use.
CAUTION
If this symbol is indicated on the product, the operator
should refer to the explanation given in the instruction
manual in order to avoid personnel injury or death to either
themselves or other personnel, and/or damage to the instru-
ment. The manual describes the special care the operator
should exercise to avoid shock or other dangers that may re-
sult in injury or loss of life.
The following symbol marks are used only in this manual.
IMPORTANT
Indicates that operating the hardware or software in a par-
ticular manner may damage it or result in a system failure.
NOTE
Draws attention to information that is essential for under-
standing the operations and/or features of the product.
2. CHECKING PRODUCT SPECIFI-
CATIONS 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:
● VJQ8 main unit, 1
● Instruction Manual (IM 77J01Q08-01E), 1
Accessories:
● Tag number label, 1
● Range label, 1
● Shunt registor (when optional code /R is specified), 1
3. GENERAL
This plug-in type pulse/analog transmitter receives contact pulse,
voltage pulse, or current pulse from the field and converts the signal
into isolated DC current or voltage signals.
• Output-2 can be selected from DC voltage signal, DC current
signal, communication function (RS-485), or alarm output (2
relay contacts).
4. MOUNTING METHODS
4.1 Wall Mounting
Loosen the main unit-fixing screw of the transmitter to disconnect
the main unit from the socket. Next, anchor the socket onto the
wall with screws. Then, plug the main unit into the socket and se-
cure the main unit with the main unit-fixing screw.
Main
unit-fixing
screw
Socket
Main unit
Threaded hole for
fixing the main unit
Mounting
screws
Fig. 4.1
4.1.1 Mounting Dimensions
U
n
i
t: mm
29.5 or more
22±0.2
59±0.3
2-M4 or 2-ø4.5 or more
Fig. 4.2
4.2 DIN Rail Mounting
Locate the transmitter so that the DIN rail fits into the upper part
of the DIN-rail groove at the rear of the socket, and fasten the
socket using the slide lock at the lower part of the socket.
Slide lock
DIN rail
DIN rail
VIEW A (Rear of socket)
VIEW A
Fig. 4.3
Keep this manual in a safe place.