The PMB-AUX and PMB-AUX-RTO are auxiliary power supplies for touchscreen fire alarm control panels. They offer 3 amps of power in standby and 8.5 amps in alarm, with four configurable power-limited NAC outputs (Class A or B). One auxiliary power output (AUX1) can also be configured for Class A or B wiring. The units can be installed in CAB-4 or CAB-5 enclosures, with a maximum of two units per enclosure. They are essential for systems with more than five loop cards to manage battery charging and alarm loads. The document details installation procedures, specifications, and wiring requirements for these power supplies.