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: 470
Ω
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.
