Electrical Installation , Control Cables - Danfoss FC 300 Design Manual

FC 300 Design Guide
How to Install

Electrical Installation , Control Cables

Diagram showing all electrical terminals without options.
Terminal 37 is the input to be used for Safe Stop. For instructions on Safe Stop installation please refer to the section
Safe Stop Installation in the FC 300 Design Guide.
* Terminal 37 is not included in FC 301 (Except FC 301 A1, which includes Safe Stop).
Terminal 29, Relay 2, is not included in FC 301.
Very long control cables and analog signals may in rare cases and depending on installation result in
50/60 Hz earth loops due to noise from mains supply cables.
If this occurs, you may have to break the screen or insert a 100 nF capacitor between screen and chassis.
The digital and analog in- and outputs must be connected separately to the FC 300 common inputs (ter-
minal 20, 55, 39) to avoid ground currents from both groups to affect other groups. For example,
switching on the digital input may disturb the analog input signal.
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MG.33.B7.02 - VLT is a registered Danfoss trademark