Chapter 6 Control TerminalsC2000 Plus
6-2
Analog input terminals (AVI, ACI, AUI, ACM)
Analog input signals are easily affected by external noise. Use shielded wiring and
keep it as short as possible (< 20 m) with proper grounding. If the noise is inductive,
connecting the shield to the ACM terminal can reduce interference.
Use twisted-pair wire for weak analog signals.
If the analog input signals are affected by noise from the AC motor drive, connect a
capacitor and a ferrite core as shown in Figure 6-1.
Figure 6-1
Contact input terminals (FWD, REV, MI1–MI8, COM)
The “COM” terminal is the common side of the photo-coupler. Any of wiring method,
the “common point” of all photo-coupler must be the “COM”.
Figure 6-2 Figure 6-3
Figure 6-4 Figure 6-5
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