Danfoss VLT Automation Drive FC 360 Programming Manual page 10

Introduction
1 1
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 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 could disturb the
analog input signal.
Input polarity of control terminals
12 18
Illustration 1.4 PNP (Source)
12 18
Illustration 1.5 NPN (Sink)
NOTICE
Control cables must be screened/armoured.
8
VLT
PNP (Source)
Digital input wiring
19 27 29 31 32 33
NPN (Sink)
Digital input wiring
19 27 29 31 32 33
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®
AutomationDrive FC 360
See the section Using Screened Control Cables in the design
guide for the correct termination of control cables.
20
Illustration 1.6 Grounding of Screened/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).
20
Speed
Start/Stop
[18]
Illustration 1.7 Start/Stop
12 18 19 27 29 31 32 33 20
Start/Stop
MG06C602