Electrical Wiring - Control Cables - Danfoss VLT AQUA Drive FC 200 Programming Manual

Introduction
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1.1.5 Electrical Wiring - Control Cables

Figure 1.2 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 Instal-
lation of the Design Guide.
In rare cases, and depending on the installation, very long
control cables and analog signals may result in 50/60 Hz
ground loops due to noise from line power supply cables.
If this occurs, it may be necessary to break the shield or
insert a 100 nF capacitor between shield and chassis.
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VLT AQUA Drive Programming Guide
The digital and analog inputs and outputs must be
connected separately to the common inputs (terminal 20,
55, 39) of the adjustable frequency drive to avoid ground
currents from both groups affecting other groups. For
example, switching on the digital input may disturb the
analog input signal.
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MG20O622 - VLT is a registered Danfoss trademark