Danfoss VLT AutomationDrive FC 301 Programming Manual page 11

Introduction
To avoid ground currents from both groups to affect other groups, connect the digital and analog inputs and outputs
separately to the common inputs (terminals 20, 55, and 39) of the frequency converter. For example, switching on the digital
input may disturb the analog input signal.
Input polarity of control terminals
PNP (Source)
Digital input wiring
12 13 18 19 27
Illustration 1.3 PNP (Source)
NPN (Sink)
Digital input wiring
12 13 18 19 27
Illustration 1.4 NPN (Sink)
NOTICE
Control cables must be shielded/armored.
See the section Grounding of Shielded Control Cables in the
design guide for the correct termination of control cables.
MG33MO02
Programming Guide
29 32 33 20 37
29 32 33 20 37
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Illustration 1.5 Grounding of Shielded/Armored Control Cables
1.5.1 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 [2] Coast inverse).
Terminal 37 = Safe Torque Off (where available).
12 13 18 19
Start/Stop
Speed
Start/Stop
[18]
Illustration 1.6 Start/Stop
27 29 32 33 20 37
Safe Stop
9
1 1