3.8.1 Electrical Installation, Control Cables
Figure 3.50: 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
in the adjustable
frequency drive Design Guide. See also sections Safe Stop and Safe 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 power
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 in- and outputs must be connected separately to the adjustable frequency drive common inputs (terminal 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.
VLT
®
Automation Drive FC 300
Instruction Manual High Power
3 How to Install
MG.33.U2.22 - VLT
®
is a registered Danfoss trademark
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