Chapter 3 Installation and Wiring
3-9
3.2.4
Wiring Precautions
•
Power supply wires routed inside the panel must be kept separate from I/O and communication wiring.
Route wiring in separate cable ducting.
If different wires must be placed in the same duct, separate them with an earthed/grounded divider.
•
Take care when wiring output modules that are designed to work as either source or sink. Incorrect wiring
can cause equipment damage.
•
Make sure that the operating conditions and environments are within the specification values.
•
Use proper wire size to meet voltage and current requirements.
•
Fit cable ends to the cables.
•
If the lines cannot be separated, use shielded lines and create a ground from the shield line.
• Use noise-reducing external wiring methods to increase overall system reliability.
• To prevent power surges or noise interference, use ducts to separate all DC I/O
or current circuit wires from communication cables.
• To prevent malfunctions due to noise, communication cables must be wired
separately from high-frequency lines and power lines such as high-voltage lines,
high-current lines, and inverters.
Duct for I/O Signal
Lines
Duct for Control
Lines
Duct for Power
Lines
I/O Signal Lines
Control Lines
Power Lines
Grounded
Separators
Duct
(non-conducting
resin/plastic)
Earth/Ground
