Hubbell Building Automation power switch packs provide both the 24 VDC power supply to operate sensors as well as the 20 Amp line voltage relay to control the load in one compact housing. The MP power packs mount in the knockout hole of a junction box.
The unit can be placed outside or inside the junction box with a simple twist-on nut. The MP power packs can also be used to supply power to up to three sensors. They can also be used to supply power to the MPSA auxiliary relay for multiple circuits.