This document introduces the features and characteristics of the LCA2285/87/90 Occupancy Sensor Power Pack, including rated load, installation method, and operating principle.
The Philips LCA22xx Series Occupancy Sensor Power Pack provides a low‑voltage power supply, load‑switching relay, and optional HVAC relay for Philips occupancy sensors (LRM2250‑LRM2280). It supports multiple sensors per pack and includes zero‑cross switching to reduce inrush current.
The guide details installation steps for mounting the pack inside or outside junction boxes or ballast cavities, wiring diagrams for single and multiple‑pack configurations, operation of the relay, and troubleshooting tips. Safety warnings emphasize turning off power, using copper or copper‑clad wires, and complying with local electrical codes.
| Load rating (LCA2285) | 20A, 2400W @ 120V, 60Hz |
|---|---|
| Load rating (LCA2290) | 15A, 5200VA @ 347V, 60Hz |
| Regulated output | 24VDC, 150mA (120mA for LCA2290) |
| Input voltage tolerance | ±10% |
| Voltage range (LCA2290) | 19‑27VDC |
Multiple occupancy sensors can be connected to a single power pack to fully cover an area.
Connect all Blue (occupancy) wires together, all Black (return) wires together, and only one Red (+24VDC) wire to the primary power pack; never connect Red wires of two different power packs together.