The PP-2PM Momentary Power Pack directly interfaces with a Latching Contactor through either line voltage or low voltage. The unit provides two 20-amp power relays that upon occupancy detection, the 1st relay closes for 3/4 of a second. When the occupancy sensors time out, the 2nd relay closes for 3/4 of a second. Typically these relays are wired to the latching coil of a lighting contactor. Remote momentary switches in the space can also turn on/off the lighting, but once the space is vacated, the sensors through the PP-2PM will turn off the lights! Other control systems that require a Pulse Input may be easily interfaced with the PP-2PM.