Delta Electronics VFD-VL manual Digital outputs MO1, MO2, MCM, Frame Torque Wire, AWG 0.3-2.1mm2

Chapter 2 Installation and Wiring

„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:

ACI/AUI1/AUI2

C

ACM

ferrite core

wind each wires 3 times or more around the core

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.

Digital outputs (MO1, MO2, 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.

The specification for the control terminals

The Position of External Terminals

										DCM +E24V
									Sink/Source
RB	MRC	MRA							mode switch
		MCM	FWD	MI1	MI3	MI5	MI7	COM	AUI1 +10V	ACM

RC RA

MO1 MO2 REV MI2 MI4 MI6 MI8 AUI2 -10V ACI

Frame	Torque		Wire
C, D, E	8 kgf-cm (6.9 in-lbf)		22-14 AWG (0.3-2.1mm2)
	Terminal: 0V/24V	1.6 kgf-com(1.4 in-lbf)	30-16 AWG (0.051-1.3mm2)

Revision Nov. 2008, VLE1, SW V1.03 2-13