An ET 200iSP power supply unit consists of a TM‑PS terminal module (A or B) and a PS power supply module which is plugged onto this. Terminal modules and power supply modules can be ordered separately.

The power supply modules are suitable for both individual operation (standard) and redundant operation. Depending on the operating mode, they must be combined with the terminal modules as follows:

• Standard: 1 Г— PS on TM‑PS‑A UC
• Redundancy: 1 Г— PS on TM‑PS‑A UC (left) plus 1 Г— PS on TM‑PS‑B UC (right)

Power supply modules are available for supplies of 24 V DC and 120/230 V AC.

The operating state of the power supply modules is indicated by two LEDs on the IM 152 interface module (one for each module).