Specifications

Safe Torque Off (STO) input is available with STO function
only
Very long control cables and analog signals occasionally
result in 50/60 Hz earth loops due to noise from mains
supply cables.
In this case, break the screen or insert a 100 nF capacitor
between screen and chassis.
The digital and analog inputs and outputs must be
connected separately to the common inputs (terminal 20,
55, 39) to avoid ground currents from both groups to
affect other groups. For example, switching on the digital
input disturbs the analog input signal.
NOTICE
Control cables must be screened.
Use a clamp from the accessory bag to connect the screen
to the frequency converter de-coupling plate for control
cables.
130BT340.10
Illustration 5.90 Screened Control Cable
How to Install VLT® HVAC Drive FC 102 Design Guide
MG16C102 - Rev. 2013-08-20 139
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