Mitsubishi Electric Q172CPU User Manual download pdf (Page 155)

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4 INSTALLATION AND WIRING

(b) Do not bunch or lay them closely the main circuit (high voltage, large

current) cables of the 100VAC and 24VDC with the I/O signal cables. If

possible, separate them 100mm (3.94inch) or more away.

absorber for thunder as shown below.

Surge absorber for thunde

Multiple CPU

system

POINTS

(1) Separate the ground of the surge absorber for thunder (E1) from that of the

PLC (E2).

(2) Select a surge absorber for thunder whose power supply voltage does not

exceed the maximum allowable circuit voltage even if at the time of maximum

power supply voltage elevation.

(2) Wiring of I/O equipment

(a) Insulation-sleeved crimping terminals cannot be used with the terminal

block.

It is recommended to cover the wire connections of the crimping terminals

with mark or insulation tubes.

(b) The wires used for connection to the terminal block should be 0.3 to

0.75mm

in core and 2.8mm (0.11inch) or less in outside diameter.

(d) When the wiring cannot be run away from the main circuit and power lines,

use a batch-shielded cable and ground it on the Motion controller side.

In some cases, ground it in the opposite side.

Input

Output

Multiple CPU system

Shielded cable

Shield

(e) Where wiring runs through piping, ground the piping without fail.

(f) Run the 24VDC input line away from the 100VAC and 200VAC lines.

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Mitsubishi Electric Q172CPU User Manual Page 155