Danfoss VLT Midi Drive FC 280 Programming Guide

In rare cases, long control cables and analog signals could
result in 50/60 Hz ground loops due to noise from mains
supply cables. If this occurs, break the screen or insert a
100 nF capacitor between screen and chassis.
The digital and analog inputs and outputs must be
connected separately to the common inputs (terminal 55)
of the frequency converter to avoid ground currents from
both groups to aect other groups. For example, switching
on the digital input could disturb the analog input signal.
Input polarity of control terminals
130BE730.10
12 13 18 19 27 29 32 33 55
+24 VDC
0 VDC
PNP (Source)
Digital input wiring
Illustration 1.3 PNP (Source)
NPN (Sink)
Digital input wiring
12 13 18 19 27 29 32 33 55
+24 VDC
0 VDC
130BE731.10
Illustration 1.4 NPN (Sink)
NOTICE
Control cables must be shielded/armoured.
See the section Using Shielded Control Cables in the design
guide for the correct termination of control cables.
130BA681.10
Illustration 1.5 Grounding of Shielded/Armoured Control
Cables
1.3.2 Start/Stop
Terminal 18 = parameter 5-10 Terminal 18 Digital Input [8]
Start.
Terminal 27 = parameter 5-12 Terminal 27 Digital Input [0]
No operation (Default coast inverse).
130BE732.10
12 13 18 322719 29 33
P 5-12 [2] P 5-10 [8]
Start/Stop
+24V
Speed
Start/Stop
[18]
Illustration 1.6 Start/Stop
Introduction
VLT
®
Midi Drive FC 280
8 Danfoss A/S © 12/2015 All rights reserved. MG07C102
11

Danfoss VLT Midi Drive FC 280 Specifications

General

Brand	Danfoss
Model	VLT Midi Drive FC 280
Category	DC Drives
Language	English