*Updated 2021* The ControlKeeper 4 network lighting control panel is a cost effective specification grade lighting control system. Control 4 relays per panel. Network up to 254 ControlKeeper panels for a state of the art lighting control system.UL listed – UL916 standardNEMA 1 enclosureCapable of mixed load voltages (120/277 VAC) as well as mixed sources (ie. normal and emergency power)4 Normally open relays, Relays are integral to control board4 low voltage input connectionsTime schedules with astronomic clockPrioritization and masking of switch inputs, time schedules, and remotesOccupant warn-off and overrides