Analog Input Terminals (Avi, Aci, Aui, Acm); Digital Inputs (Fwd, Rev, Jog, Ef, Trg, Mi1-Mi6, Dcm); Digital Outputs (Mo1, Mo2, Mo3, Mcm) - Delta VFD-B User Manual

Chapter 2 Installation and Wiring|VFD-B Series
Terminal
Symbol
Analog output meter
ACM circuit
AFM
internal circuit
Analog control signal
ACM
(common)
Control signal wiring size: 18 AWG (0.75 mm

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:
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.
2-24
Terminal Function
AFM
0~10V
potentiometer
Max. 2mA
ACM
wind each wires 3 times or more around the core
Factory Settings (SINK)
ON: Connect to DCM
0 to 10V, 2mA
Impedance:
Output current
Resolution:
Range:
Function:
Common for AVI, ACI, AUI, AFM
2
) with shielded wire.
AVI/ACI/AUI
C
ACM
ferrite core
Revision July 2008, BE16, SW V4.08 & V5.00
470Ω
2mA max
8 bits
0 ~ 10VDC
Pr.03-05