Danfoss VLT HVAC Drive FC 102 Design Manual page 160

How to Install
5.7.3 Grounding of Screened/Armoured
Control Cables
Control cables should be braided, screened/armoured, and
the screen must be connected with a cable clamp at both
ends to the metal cabinet of the unit. Illustration 5.106
shows correct grounding examples.
5 5
158
Design Guide
PLC etc.
PLC etc.
PLC etc.
PLC etc.
PE
69
68
a
b Incorrect grounding
c
d 50/60 Hz ground loops
e
Illustration 5.106 Grounding Examples
Danfoss A/S © Rev. 05/2014 All rights reserved.
PE PE
PE
PE PE
PE PE
Min. 16mm
Equalizing cable
PE
100nF
FC
61
PE
Correct grounding
Protection from potential between PLC and frequency
converter
Cables for Serial Communication
FC
a
FC
PE
b
FC
c
2
FC
d
FC
68
69
e
MG16C202