Planning Potential Groups And Ex Power Modules - Siemens SIMATIC ET 200SP HA System Manual

Introduction
The following figure shows the distributed I/O when integrating Ex module groups and power
supply from the TN-S network:
4.6.7

Planning potential groups and Ex power modules

You must ensure that the power supply is from safe extra-low-voltage.
Check the load on the Ex power modules
Ensure that the current consumption of the Ex I/O modules of an Ex module group does not
exceed the permissible output current of the Ex power module in any operating situation.
Note the derating "Mechanical and climatic environmental conditions (Page 106)".
The maximum current requirement of an Ex I/O module can be found in the documentation of
the respective Ex I/O module.
Modules for devices in a hazardous area
System Manual, 04/2021, A5E50165138-AA
Plant planning
4.6 Power supply and potential ratios
47