Ulvac C30VR Series, Installation, Operation, Maintenance And Troubleshooting Instructions

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C30VR Compressor Installation, Operation, Maintenance and Troubleshooting
4-10 ULVAC CRYOGENICS INCORPORATED
C30VR wiring precautions
In Alternate operating mode, the pins number 15 and 16 sh
(1)
ould be wired as operation
tric
urrent or noise problem due to a ground-loop.
er 15 and 16)
line.
) Twist paired signal lines such as COMP RUN1 and COMP RUN2.
(6) These are signal lines. Do not drive the power device by direct output signals (such
as answer-back signals) from the compressor. It may cause a failure of the product.
command signals but not 6, 7, 8 and 9.
Conversely, in Momentary operating mode the pins number 6, 7, 8, and 9 should be
wired as operation command signals but not 15 and 16. Therefore choose
appropriate wiring depending on the operating mode.
(2) Wire GND (pin number 14) only when it is needed. GND has the same elec
potential as the compressor chassis. Connecting ground wire that has different
power line (such as AC400V) from the compressor power supply line may cause
overc
(3) Twist each signal line with a nearby COM line. (e.g.: Twist pin numb
(4) COM lines are used as return lines of nearby signal lines. Therefore it is necessary
to wire all the COM line which corresponds to the signal line, not to use just one COM
(5