S120/277/347E-P – B347D-P Power and Auxiliary Relay Packs

WattStopper B347D-P Power Packs provide 24VDC operating voltage to all WattStopper 24VDC occupancy sensors and daylighting controllers. Auxiliary Relay Packs are similar to power packs, but only have an isolated relay and no transformer power supply.

B347D-P Power Packs consist of a transformer and high-current relay combined in one small, powerful package. The transformer has a primary high voltage input and a secondary, low voltage output (24 VDC, 114 mA with relay connected). The secondary voltage provides operating power to WattStopper sensors. When the occupancy sensors detect motion or daylighting sensors detect inadequate ambient light, they electrically close an internal circuit, which sends 24 VDC back to the Power or Auxiliary Relay Packs that control the lighting system.

• Self-contained transformer relay system
• Available for 347 volt systems
• Capable of switching up to 20 Amps of electrical load (ballast) at 120/277V for S120/277/347 models, 15A at 347V for all models
• Low voltage leads are teflon coated for use in plenum applications
• Can be used as a low voltage switch for other applications or as stand-alone, low voltage switch

• 1/2 inch snap-in nipple attaches to standard electrical enclosures via 1/2 inch knockouts
• Installation in junction box not required
• Qualifies for ARRA-funded public works projects