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MELSEC-Q
4 INSTALLATION, WIRING AND MAINTENANCE OF THE PRODUCT
[Wiring examples using duct (incorrect example and corrected example)]
Relay
Servo
amplifier
Noise source
PLC
QD
75
MH
Changed
Control panel
(Power system,
etc.)
Control panel
Servo
amplifier
Relay
Relay
Noise source
(Power system,
etc.)
Relay Relay
Relay
PLC
Servo
amplifier
Servo
amplifier
The servo amplifiers are placed
near the noise source.
The connection cable between
the QD75MH and servo amplifiers
is too long.
The QD75MH and servo amplifiers
are placed closely. The connection
cable between the QD75MH and
servo amplifier is separately laid
from the power line (in this example,
the cable is outside of the duct) and
is as short as possible.
Wiring duct
Wiring duct
QD
75
MH