Depending on the possible combinations listed in the table, the power modules are plugged onto corresponding TM?P terminal modules. Power modules are suitable for dividing the ET 200S into potential groups. A power module must be plugged in at the beginning of each potential group. In addition, the first module following the IM 151?1 High Feature interface module must always be a power module.

The TM?P terminal module of the power module interrupts the voltage buses (P1/P2) and therefore opens up a new potential group. All sensor and load supplies of the downstream electronics modules are fed from the TM-P and monitored by the power module. The total current of all modules of a potential group is limited by the maximum current carrying capacity of the power module, which is up to 10 A, depending on the voltage and temperature range; for details, refer to the technical specifications of the power modules in the ST 70 Catalog or in the Industry Mall under "Automation technology - Automation systems - SIMATIC industrial automation systems - IO systems - SIMATIC ET 200 systems for control cabinets" – SIMATIC ET 200S".

Possible combinations of the TM?P terminal modules and PM?E power modules