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MELSEC-Q
4 INSTALLATION, WIRING AND MAINTENANCE OF THE PRODUCT
[1] Precautions for wiring
(1) Use separate cables for connecting to the QD75 and for the power cable
that create surge and inductance.
(2) The shielded cable for connecting QD75 can be secured in place.
If the shielded cable is not secured, unevenness or movement of the
shielded cable or careless pulling on it could result in damage to the QD75
or drive unit or shielded cable or defective cable connections could cause
mis-operation of the unit.
(3) If a duct is being used and cables to connect to QD75 are separated from
the power line duct, use metal piping.
Ground the pipes securely after metal piping.
(4) The cable is to use the twisted pair shielded cable (wire size 0.3 mm
2
). The
shielded must be grounded on the QD75 side.
[Wiring example of shielded cable]
The following shows a wiring example for noise reduction in the case where the
connector A6CON1 is used.
To QD75
Connector
(A6CON1)
To external
devices
Shielded
cable
The length between the connector and the shielded
cables should be the shortest possible.
Use the shortest possible length to
ground the 2mm or more FG wire.
(The shield must be grounded on
the QD75 side.)
To external device
To external device
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