Very long control cables and analog signals may, in rare
cases and depending on the 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 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 to affect other groups. For
example, switching on the digital input may disturb the
analog input signal.
Input polarity of control terminals
NOTE!
Control cables must be shielded/armored.
See section entitled
Grounding of Shielded/Armored Control
Cables
for the correct termination of control cables.
1.1.6 Start/Stop
Terminal 18 =
5-10 Terminal 18 Digital Input
[8]
Start
Terminal 27 =
5-12 Terminal 27 Digital Input
[0]
No operation
(Default
coast inverse
)
Terminal 37 = Safe stop (where available!)
Introduction
FC 300 Programming Guide
MG.33.MA.22 - VLT
®
is a registered Danfoss trademark
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