Installing/Mounting
4.4 Connecting a CU240S DP or CU240S DP-F via PROFIBUS DP
Control Units CU240S
Operating Instructions, 07/2008 - FW 3.2, A5E00766042B AD
41
Equipotential bonding
Differences in potential (for example, due to different mains supplies) between the inverters
and the PROFIBUS DP master must be avoided.
● Recommended equipotential bonding cables:
– 16 mm
2
Cu for equipotential bonding cables up to 200 m long
– 25 mm
2
Cu for equipotential bonding cables of over 200 m long.
● Equipotential bonding cables must be routed as close as possible to signal leads; this
means that the area between the bonding conductor and signal lead is as small as
possible.
● Equipotential bonding cables must be contacted in a 360° connection with the earth
electrode/PE conductor.
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