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Chapter 4 Installation, Wiring and Maintenance of the Produc
[1] Precautions for wiring
(1) Use separate cables for connecting to the QD77MS and for the power cable
that create surge and inductance.
(2) The cable for connecting QD77MS can be placed in the duct or secured in
place by clamps. If the cable is not placed in the duct or secured by clamps,
unevenness or movement of the cable or careless pulling on it could result
in damage to the unit or cable or defective cable connections could cause
mis-operation of the unit.
(3) If a duct is being used and cables to connect to QD77MS are separated
from the power line duct, use metal piping.
Ground the pipes securely after metal piping.
(4) Use the twisted pair shielded cable (wire size 0.3 mm
2
or more). The
shielded must be grounded on the QD77MS side. (The following figure
shows a wiring example.)
(5) Use separate shielded cables of the forced stop input signal (EMI,
EMI.COM), limit signal (FLS RLS DOG STOP), external command
signal/switching signal (DI, COM), and manual pulse generator/incremental
synchronous encoder input signal (HAH, HAL, HBH, HBL, HA, HB, 5V, SG)
for connecting to the QD77MS. They can cause electrical interference,
surges and inductance that can lead to mis-operation.
[Wiring example of shielded cable]
The following shows a wiring example for noise reduction in the case when the
connector (A6CON1) is used.
To QD77MS
Connector
(A6CON1)
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
2
or more FG wire.
(The shield must be grounded on
the QD77MS side.)
For forced stop
input signal
For limit signal,
etc.
For manual pulse
generator signal
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