Download NX7 Machine Automation Controller CPU Unit Hardware

4 Installation and Wiring
z 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 partition.
4-5 Control Panel Installation
Partition
Signal
Signal
cables
cables
(group A) (group B)
Signal
cables
(group C)
Power
supply
cables
Signal cables
(a)
(b)
Signal cables
Signal cables
Power supply cables
Power supply cables
(c)
4
(d)
• To avoid overheating the conduits when using conduits for wiring, do not place wires for a single
circuit in separate conduits.
Power supply
NG
Conduits
Load
Incorrect
Power supply
OK
Conduits
Load
Correct
Power supply
Conduits
OK
Load
Correct
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 4-42.)
NX-series CPU Unit Hardware User’s Manual (W535)
4 - 45
4-5-5 Electrical Environment
Partitioning Methods for Signal and Power Supply Cables