!
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29
In order to improve the electromagnetic compatibility (EMC), connect the LG (
or
) terminal to the screw on the end plate using the supplied DIN-track con-
necting cable.
DIN-track cable
(Supplied with
the CQM1 PC)
Short-circuit bar
(Supplied with the CQM1 PC)
Grounding wire
(Use a wire of at least 2 mm
2
to ground at a resistance of
less than 100
Ω
.)
Note Definition of EMC:
The EMC refers to the capacity of equipment represented in terms of emission,
which indicates the degree to which electromagnetic waves produced by equip-
ment do not affect other communications equipment, and also in terms of immu-
nity, which indicates the degree of resistance against electromagnetic distur-
bance.
2-5-4 I/O Unit Wiring
Note To satisfy the EC directives (low-voltage directives), provide reinforced insula-
tion or double insulation for the DC power supply used with the I/O Unit.
The following information must be considered when connecting electrical
devices to I/O Units.
Caution
Tighten the terminal screws to a torque of 0.5 to 0.6 N
S
m.
WARNING
Do not apply voltages exceeding the input voltages to Input Units nor voltages
exceeding the switching capacity to Output Units. Doing so may result in
damage or destruction of the I/O Unit or result in fire.
Wiring and Connections
Section 2-5