4-11
[e] Command Pulse Signal Lines
• Use twisted-pair shield wires for the command pulse signal lines.
• The wires must not be longer than 1 m.
• Keep the wires approximately 30 cm away from other signal or power lines. Lay out the wires sepa-
rately from other signal or power lines.
AC power supply
Surge
absorber
AC power supply input
Metal conduit
Ground
plate
Ground at a
resistance
of less than
100 Ω.
AC Servo Driver (R88D-UP)
Power
supply for
command
pulse use
Machine ground
Position Control Unit
(C200H-NC112)
Control panel ground
Other I/O power supply
2 mm
2
min.
Countermeasures Against Noise Chapter 4
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