Power supplies are screwed directly to the S7-1500 mounting rail and are connected with the upstream or downstream module via a U connector. PS 60W 24/48/60V DC HF can only be connected next to the CPU/IM on the left-hand side.

The front of the power supply contains:

• Diagnostics LEDs to indicate status and errors:
  Error (Error), operation (RUN), maintenance (MAINT)

The power supplies also come with the following:

• On-off switch
• Power supply terminals