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Wiring and Connections Section 4-7
Wiring Precautions for
Ground Wires
Wire the grounding wires according to the diagram below.
In order to improve the electromagnetic compatibility (EMC), connect the LG
( or ) terminal to the screw on the end plate using the DIN-track con-
necting cable provided.
Note Definition of EMC:
The EMC refers to the capacity of equipment represented in terms of emis-
sion, which indicates the degree to which electromagnetic waves produced by
equipment do not affect other communications equipment, and also in terms
of immunity, which indicates the degree of resistance against electromagnetic
disturbance.
!Caution Do not share grounds with other equipment or attaching to the beam of a
building. Improper grounding will cause adverse results.
4-7-2 Connecting the CPU Block and Expansion I/O Block
Expansion I/O Cable A CS1-series Expansion I/O Cable must be used. One of these cables is
shown below.
Note A cable longer than 0.7 m cannot be used.
DIN-track cable
(Supplied with
the CQM1H PC)
Short-circuit bar
(Supplied with the CQM1H PC)
Grounding wire
(Use a wire of at least 2 mm
2
to ground at a resistance of
less than 100 Ω.)
CQM1H
Other
equipment
CQM1H
Other
equipment
Correct Incorrect
Name Model Specifications
Expansion I/O Cable CS1W-CN313 Length: 0.3 m
CS1W-CN713 Length: 0.7 m
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