Chapter 9 Installation and Wiring
9-
5) To minimize voltage drop, use the thickest (max. 2
᎙
) wires possible
6) Do not bundle the 100 VAC and 24VDC cables with main-circuit (high voltage, large current) wires
or the I/O signal wires. If possible, provide more than 80
㎜
distance between the cables and wires.
7) As a measure against very large surge(e.g. due to lightening),connect a surge absorber as shown below.
Remark
1)
Ground the surge absorber(E1) and the PLC(E2) separately from each other.
2)
Select a surge absorber making allowances for power voltage rises.
8) Use a insulating transformer or noise filter for protection against noise.
9) Twist every input power supply wires as closely as possible. Do not allow the transformer or noise filter across the duct.
E2
PLC
E1
Surge absorber for lightening
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