Siemens Simatic ET 200S Operating Instructions Manual page 312

Leakage resistance
E.1 Establishing the leakage resistance of an ET 200S station
Example
In the setup of an ET 200S there is one IM151-1 STANDARD and two PM-E DC24V power
modules and various input and output modules. The entire ET 200S station is protected by
one ground-fault detector:
Figure E-1
E-2
Calculation example for the leakage resistance
Operating Instructions, 12/2005, A5E00515771-03
ET 200S