Analog Input Terminals (Avi1, Aci, Avi2, Acm) - Delta VFD007FP4EA-41 User Manual

Analog input terminals (AVI1, AVI2, ACI, ACM)
Analog input signals are easily affected by external noise. Use shielded wiring and keep it as
short as possible (<20m) with proper grounding. If the noise is inductive, connecting the shield to
terminal ACM can bring improvement.
If the analog input signals are affected by noise from the AC motor drive, please connect a
capacitor and ferrite core as indicated in the following diagram.
Digital inputs (FWD, REV, MI1~MI8, COM)
When using contacts or switches to control the digital inputs, please use high quality components
to avoid contact bounce.
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".
When the photo-coupler is using internal power supply, the switch connection for Sink and Source as below:
MI-DCM: Sink mode, MI-+24 V: Source mode
When the photo-coupler is using external power supply, remove the short circuit cable between the +24V
and COM terminals. The connection mode is Sink mode or Source mode is according to the below:
The "+" of 24V connecting to "COM: Sink mode
The "-" of 24V connecting to COM: Source mode
1
Sink Mode
with internal power (+24VD C)
+2 4V
COM
Wind each wires 3 times or more around the core
MI1
MI2
MI8
internal c irc ui t
DCM
Chapter 6 Control Terminals|CFP2000 Series
2
Sourc e Mode
w ith internal power (+24VDC)
MI1
MI2
MI8
DCM
COM
+2 4V
6-5
internal c irc ui t