Capable of mixed load voltages (120/277/347 VAC) and mixed sources;Manual and programmable control of each relay;Capable of controlling receptacle loads;Normally open, latched and two pole serial relays available;30 Amp relays one used on all 20A relay cards to extend relay life;UL listed – UL 916 standard;RS-232 port and RS-485 network standard;NEMA 1 enclosure;Time schedules with astronomic clock;Occupant warn-off and overrides;Prioritization and masking of switch inputs, schedules, and remotes