Siemens SINAMICS S120 Manual page 214

Cabinet Modules
6.4 Heat Exchanger Modules
The maximum cable length that can be connected is 10 m.
NOTICE
Inadmissible equalization currents as a result of potential differences when using different
power supply sources
Using different power sources for the Heat Exchanger Module and the other Cabinet
Modules can result in potential differences and inadmissible equalizing currents flowing
through the DRIVE-CLiQ interface of the TM31 Terminal Module.
• For the external 24 V DC power supply of the control box, use the same power supply
212
that is used for the other Cabinet Modules in the same DRIVE-CLiQ line.
Cabinet Modules liquid cooled
Equipment Manual, 04/2020, A5E37067587A