Siemens Simantic ET 200S Manual page 41

Placing power modules and connecting them to common potential
①
②
③
④
⑤
⑥
⑦
Warning
If you connect the AUX1 bus to common potential independently of the P1/P2 buses
(different voltages), there is no safe electrical separation between the AUX1 bus and the
P1/P2 buses.
Connecting different potentials to the AUX1 bus
Note
If you apply different potentials to the AUX1 bus within an ET 200S station, you must
separate the voltage groups by means of a power module with the TM-P15S23-A0 terminal
module.
ET 200S
Manual, Edition 10/2005, A5E00514527-01
4
1 2
7
Interface module
Power module
Terminating module
Voltage group 1
Voltage group 2
Voltage group 3
Supply voltage 1
5
2 2
8 7 9
⑧ Supply voltage 2
⑨ Supply voltage 3
⑩ Protective conductor
⑪ Additionally required voltage
⑫ P1/P2 power buses
⑬ AUX1 bus
Power modules
6
3
2-13