Mitsubishi Electronics QD75D ユーザーズマニュアル

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MELSEC-Q

4 INSTALLATION, WIRING AND MAINTENANCE OF THE PRODUCT

[Wiring examples using duct (incorrect example and corrected example)]

Relay

Drive

unit

Drive

unit

Noise source

Relay

PLC

Relay

PLC

Drive

unit

Drive

unit

Changed

Wiring duct

Control panel

The QD75 and drive units are

placed closely. The connection

cable between the QD75 and

drive units is separately laid

from the 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 drive units are placed

near the noise source.

The connection cable between

the QD75 and drive units is

too long.

(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.

(12) If compliance with the EMC directive is not required, the influence of external

noise may be reduced by making the configuration compliant with the EMC

directive.

For the configuration compliant with the EMC directive, refer to Chapter 3 "EMC

AND LOW-VOLTAGE DIRECTIVES" in the User's Manual (Hardware) of the

used CPU module.