Chapter 10 Installation and wiring MASTER-K
10-15
10.3.2 Input and Output Devices Wiring
1) Applicable size of wire for I/O wiring is 0.3 to 2 mm
2
. However, it is recommended to use
wire of 0.3mm
2
for convenience.
2) Separate the input and output lines.
3) I/O signal wires must be at least 100 mm away from high voltage and large current main
circuit wires.
4) When the I/O signal wires cannot be separated from the main circuit wires and power
wires, ground on the PLC side with batch-shielded cables.
5) If wiring has been done with a piping, ground the piping.
6) Separate the 24 VDC I/O cables from the 110 VAC and 220 VAC cables.
7) If wiring over 200 m or longer distance, problems can be caused by leakage currents
due to line capacity. Refer to the Section 12.4 Examples.
10.3.3 Grounding
1) This PLC has sufficient protection against noise, so it can be used without grounding
except for special much noise. However, when grounding it should be done conforming to
below items.
2) Ground the PLC as independently as possible. Class 3 grounding should be used
(grounding resistance 100 Ω or less).
3) When independent grounding is impossible, use the joint grounding method as shown in
the figure below (B).
To Next Page
Loading...
