Delta VFD-B - Analog Input Terminals (AVI, ACI, AUI, ACM); Digital Inputs (FWD, REV, JOG, EF, TRG, MI1-MI6, DCM); Digital Outputs (MO1, MO2, MO3, MCM)

Chapter 2 Installation and Wiring|VFD-B Series
2-24 Revision July 2008, BE16, SW V4.08 & V5.00
Terminal
Symbol
Terminal Function
Factory Settings (SINK)
ON: Connect to DCM
AFM
Analog output meter
AFM
ACM
0~10V
Max. 2mA
potentiometer
ACM circuit
internal circuit
0 to 10V, 2mA
Impedance: 470Ω
Output current 2mA max
Resolution: 8 bits
Range: 0 ~ 10VDC
Function: Pr.03-05
ACM
Analog control signal
(common)
Common for AVI, ACI, AUI, AFM
Control signal wiring size: 18 AWG (0.75 mm
2
) with shielded wire.
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 (<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 diagrams:
C
AVI/ACI/AUI
ACM
ferrite core
wind each wires 3 times or more around the core
Digital inputs (FWD, REV, JOG, EF, TRG, MI1~MI6, DCM)

When using contacts or switches to control the digital inputs, please use high quality
components to avoid contact bounce.
Digital outputs (MO1, MO2, MO3, MCM)

Make sure to connect the digital outputs to the right polarity, see wiring diagrams.

When connecting a relay to the digital outputs, connect a surge absorber or fly-back diode
across the coil and check the polarity.