Omron NX-PA Series User Manual page 134

4 Installation and Wiring
 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.
Signal
cables
(group A)
Signal cables
Power supply cables
Partitioning Methods for Signal and Power Supply Cables
• To avoid overheating the conduits when using conduits for wiring, do not place wires for a single
circuit in separate conduits.
Power supply
Power supply
Power supply
Parallel Wiring (Single Phase)
• 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.)
4 - 46
Signal Signal
cables cables
(group B) (group C) Signal cables
(a)
(c)
NG
Conduits
Incorrect
Conduits
OK
Correct
Conduits
OK
Correct
Partition
Power
supply
cables
(b)
Signal cables
Power supply cables
(d)
Load
Load
Load
NX-series CPU Unit Hardware User's Manual (W535)