41
Wiring Precautions Section 2-5
an insulating transformer and a line filter in the power supply section to
remove such noise.
• Use twisted-pair cables for power supply lines. Use adequate grounds
(i.e., to 100 Ω or less) with wire cross sections of 1.25 mm
2
or greater.
• Use twisted-pair shielded cables for control voltage output signals, input
signals and encoder signals.
• The maximum distance for the encoder signal from an encoder to the MC
Unit must not exceed 20 m.
• The input terminals that operate the 24 V system are isolated with optical
couplers to reduce external noise effects on the control system.
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