Omron NX701-1620, User Manual

Page: 136 / 168

4 Installation and Wiring
4 - 46 NX-series CPU Unit Hardware User’s Manual (W535)
 Wiring
Observe the following points when wiring power supply and signal cables.
• When routing signal cables with differing characteristics through the same duct, always keep
them separated.
• As much as possible, avoid routing multiple power supply lines through the same duct.
If it cannot be avoided, then construct a partition between them in the duct and ground the parti-
tion.
• To avoid overheating the conduits when using conduits for wiring, do not place wires for a single
circuit in separate conduits.
• Power cables and signal cables adversely affect each other. Do not wire them in parallel.
• Noise induction may occur if the Controller is installed in a panel that includes high-voltage
devices. Wire and install them as far apart as possible. (Refer to Controller Installation Location
on page 4-43.)
Partitioning Methods for Signal and Power Supply Cables
(a) (b)
(c) (d)
Signal cables
Signal cables
Signal cables
Power supply cables
Power
supply
cables
Power supply cables
Partition
Signal
cables
(group A)
Signal
cables
(group B)
Signal
cables
(group C)
Parallel Wiring (Single Phase)
Correct
Correct
Power supply
Incorrect
Power supply
Power supply
Load
Load
Load
Conduits
Conduits
Conduits
OK
OK
NG