Electrical Installation - Continued; Electrical Installation, Control Cables - Danfoss FC 100 Instruction Manual

VLT ® HVAC DRIVE High Power
Instruction Manual

3.8. Electrical Installation - continued

3.8.1. Electrical Installation, Control Cables

3.82: Diagram showing all electrical terminals without options.
Terminal 37 is the input to be used for Safe Stop. For instructions on safe stop installation, refer to the section
Safe Stop Installation
Stop Installation.
In rare cases, very long control cables and analog signals may, depending on installation, result
in 50/60 Hz ground loops due to noise from line supply cables.
If this occurs, it may be necessary to break the shield or insert a 100 nF capacitor between shield
and chassis.
The digital and analog inputs and outputs must be connected separately to the adjustable fre-
quency drive common inputs (terminal 20, 55, 39) to prevent ground currents from both groups
in the adjustable frequency drive Design Guide. See also sections Safe Stop and Safe
MG.11.F1.22 - VLT ® is a registered Danfoss trademark.
3. How to Install
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