Start/Stop - Danfoss VLT AutomationDrive FC 360 Programming Manual

Introduction
In rare cases, very long control cables and analog signals
may 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 20
and 55) of the frequency converter to avoid ground
currents from both groups to affect other groups. For
example, switching on the digital input may disturb the
analog input signal.
Input polarity of control terminals
PNP (Source)
Digital input wiring
12 18 19 27 29
Illustration 1.4 PNP (Source)
NPN (Sink)
Digital input wiring
12 18 19 27 29
Illustration 1.5 NPN (Sink)
MG06C402
Programming Guide
31 32 33 20
31 32 33 20
Danfoss A/S © Rev. 2014-03-31 All rights reserved.
NOTICE
Control cables must be screened/armoured.
See the section Using Screened Control Cables in the Design
Guide for the correct termination of control cables.
Illustration 1.6 Grounding of Screened/armoured Control
Cables

1.3.2 Start/Stop

Terminal 18 = 5-10 Terminal 18 Digital Input [8] Start
Terminal 27 = 5-12 Terminal 27 Digital Input [0] No
operation (Default coast inverse)
12 18 19 27
Start/Stop
Speed
Start/Stop
[18]
Illustration 1.7 Start/stop
29 31 32 33 20
11
1 1