Siemens SIMATIC ET 200SP System Manual page 250

Calculating the leakage resistance
Example
The structure of an ET 200SP consists of an IM 155-6 PN ST, two BaseUnits BU15...D and
various input and output modules. The entire ET 200SP is protected with one ground-fault
detector:
Figure C-1
250
Calculation example for leakage resistance
Distributed I/O system
System Manual, 12/2015, A5E03576849-AF