Mitsubishi QD70P4 - Page 81

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MELSEC-Q
5 SETUP AND PROCEDURES BEFORE OPERATION
[Wiring examples using duct (improper example and improved
example)]
Relay
Drive
unit
Drive
unit
Noise source
Relay
Relay
PLC CPU
QD
70
Relay Realy
Relay
PLC CPU
QD
70
Drive
unit
Changed
Wiring duct
Wiring duct
Control box
Control panel
The QD70 and drive units are
placed closely.The connection
cable between the QD70 and
drive units is separately laid
from teh power line (in this
example, the cable is outside of
the duct) and is as short as possible.
(Power system,
etc.)
Noise source
(power system,
etc.)
The deive units are placed
near the noise source.
The connection cable between
the QD70 and drive units is
too long.
Drive
unit