The PS-12 is a backplane-mounting power supply module that provides high-voltage (HV) AC-to-DC and DC-to-DC conversion for the backplane (12VBP and 5VBP), 12V auxiliary output and for an optional 24V isolated auxiliary output. Both auxiliary outputs can be controlled (switched ON or OFF) by the RTU configuration.

The PS-12 supports power supply redundancy. Multiple power supply modules can be installed on the backplane. The PS-12 also supports hot-swapping. The module can be removed while the RTU is running—provided there is an alternate power source such as another PS-12 in the backplane.