Delta Electronics VFD-M - Manual (Page 28)

Chapter 2 Installation and Wiring|
Revision May 2008, ME14, SW V3.04 2-11
Terminal
Symbol
Terminal Function Factory Settings (NPN mode)
MO1
Multi-function Output Terminal
(Photocoupler)
Maximum: 48Vdc, 50mA
Refer to P45 for programming.
MO1-DCM
MO1
MCM
Internal Circuit
Max: 48Vdc/50mA
MCM
Multi-function Output Common
(Photocoupler)
Common for Multi-function Outputs
Note: Use twisted-shielded, twisted-pair or shielded-lead wires for the control signal wiring. It is
recommended to run all signal wiring in a separate steel conduit. The shield wire should only be
connected at the drive. Do not connect shield wire on both ends.
Analog inputs (AVI, ACI)
„ 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 GND can bring improvement.
„ If the analog input signals are affected by noise from the AC motor drive, please connect a
capacitor (0.1
μ
F and above) and ferrite core as indicated in the following diagrams:
C
AVI/ACI
GND
ferrite core
wind each wires 3 times or more around the core
Digital inputs (M0~M5)
„ When using contacts or switches to control the digital inputs, please use high quality
components to avoid contact bounce.
Digital outputs (MO1)
„ 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.