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3. INSTALLATION
3.4 Noise Countermeasures
I - 14
The cables connected to the control unit for which the shield must be connected to the ground are shown
below.
Unit name Connector name Application/function Cable shield treatment
SERVO1
Servo drive unit/spindle drive unit
Required
SERVO2
Auxiliary axis
Required
HANDLE
Manual pulse generator
Required
ENC
Synchronous feed encoder
Required
SIO
RS-232C
Required
TERMINAL
Communication terminal
Required
SKIP
Sensor signal
Required
DIO
Machine input/output signal
Not required
RIO-M
Remote I/O unit
Required
Control unit
(FCU6-MU043)
(FCU6-MU042)
(FCU6-MU041)
RIO-M/S
Remote I/O unit
Required
3.4.3 Connection of Spark Killer
The noise generated when the coil/contact operates must be removed.
As a countermeasure, connect a spark killer in parallel with the coil/contact.
Coil
Contact
E
SK
SK
The CR compound element is effective in removing the noise generated due to magnetic induction.
Spark killer C: 0.033 to 0.1µF
R: 10 to 120Ω