Mitsubishi QD75P1N User Manual page 101

4 INSTALLATION, WIRING AND MAINTENANCE OF THE PRODUCT
[Wiring examples using duct (incorrect example and corrected example)]
Control
panel
Control
panel
Relay
Drive Drive
unit unit
Noise source
(power system, etc.)
Relay
Noise source
(power system, etc.)
(11) The influence of noise may be reduced by installing ferrite cores to the cable
connected to the QD75 as a noise reduction technique.
For the noise reduction techniques related to connection with the servo amplifier,
also refer to the instruction manual of the servo amplifier.
Relay
Relay
Programmable
controller
Changed
Relay
Relay
Programmable
controller
Drive
unit
4 - 13
MELSEC-Q
Wiring duct
The drive units are placed
QD
near the noise source.
75
The connection cable
between the QD75 and
drive units is too long.
Wiring duct
The QD75 and drive units
QD
are placed closely.
75
The connection cable
between the QD75 and
drive units is separately
laid from the power line
Drive
(in this example, the cable
unit
is outside of the duct) and
is as short as possible.