Leakage Resistance Of The I/O Station - Siemens SIMATIC ET 200SP HA System Manual

Leakage resistance of the I/O station

Introduction
If you want to protect the I/O station with ground fault monitoring or an RCD switch, you need
the leakage resistor to select the right safety component.
Note
Additional leakage resistors from Ex system must be considered in the entire system setup
(ET 200SP / ET 200SP HA). You can find the calculations for this in the respective system manual.
Ohmic resistance
When determining the leakage resistance of the I/O station, you additionally need to take into
account the ohmic resistance from the RC combination of the Ex power module:
Ex power module for feeding the supply volt‐
age
Modules for devices in a hazardous area
System Manual, 04/2021, A5E50165138-AA
Module Ohmic resistance from RC network
11 MΩ
C
125