Description
Philips Dynalite OccuSwitch Classic Power Pack, Universal 120-277V Input, 24DC and 150mA Power Control, 20A Rating, Plenum rated 1/2" threaded nipple
Philips OccuSwitch Classic LCA2285 Power Pack Guide
Quick Answer: The Philips OccuSwitch Classic LCA2285 (Signify / Philips Lighting) is a universal line-voltage occupancy sensor power pack engineered to supply regulated 24V DC low-voltage power (up to 150mA) to low-voltage ceiling sensors while providing heavy-duty 20A line switching across 120–277V AC circuits. Featuring integrated zero-cross switching circuitry to protect against ballast and LED inrush currents, Teflon-coated Class 2 plenum-rated leads, and a 1/2-inch threaded chase nipple for mounting inside or outside a standard junction box or fixture ballast channel, it serves as the essential power and switching interface for commercial lighting control systems.
Philips OccuSwitch Classic LCA2285 Overview & Key Features
The Philips LCA2285 delivers robust, commercial-grade electrical switching and sensor power management across private offices, classrooms, conference areas, and commercial retrofit projects:
- Universal Line Voltage Input: Operates seamlessly across AC branch line supplies from 120V to 277V AC (including 230V) at 50/60 Hz without manual transformer taps.
- Regulated 24V DC Auxiliary Output: Supplies up to 150mA of regulated 24V DC power, capable of powering multiple low-voltage occupancy sensors, daylight sensors, or auxiliary add-a-relay modules.
- Zero-Cross Relay Switching: Integrates zero-crossing circuitry that synchronizes contact closure with the AC sine wave, dramatically reducing contact erosion caused by high capacitive inrush currents from electronic LED drivers and fluorescent ballasts.
- Plenum-Rated Flexible Mounting: Features Teflon-coated Class 2 wiring and a UL 2043 plenum-rated design that mounts directly to a 4x4 junction box knockout with an integral 1/2-inch threaded nipple or fastens inside luminaire ballast wireways.
- Heavy-Duty Load Handling: Rated for full 20A ballast and incandescent loads, as well as 1 HP at 120V AC and 2 HP at 240V AC for motor loads.
Philips OccuSwitch Classic LCA2285 Technical Specifications
Core electrical parameters, load capacities, and mechanical ratings for the Philips LCA2285 Power Pack:
| Specification Parameter | Rating / Value | Details & Performance Standards |
|---|---|---|
| Input Line Voltage | 120 – 230 – 277 VAC | Universal AC line input, 50/60 Hz |
| Low-Voltage Output | 24 VDC, 150 mA Regulated | Class 2 DC control bus power for sensors |
| Fluorescent / Ballast / LED Load | 20A (2400VA @ 120V / 5540VA @ 277V) | Heavy-duty zero-cross protected contacts |
| Incandescent / Tungsten Load | 20A (2400W @ 120V) | Full circuit capacity rating |
| Motor Rating | 1 HP @ 120 VAC / 2 HP @ 240 VAC | Supports exhaust fans and small fractional motors |
| Power Consumption | 3.6 Watts Max | Low standby power drain |
| Mounting Configuration | 1/2" Threaded Nipple / Ballast Channel | Mounts inside/outside standard J-box with locknut |
| Dimensions | 3.81" W x 2.40" H x 1.43" D | Compact housing engineered for tight electrical enclosures |
| Operating Environment | 32°F to 104°F (0°C to 40°C) | 0% to 90% non-condensing relative humidity |
| Compliance & Certifications | UL / cUL Listed, UL 2043 Plenum Rated | Meets ASHRAE 90.1, IECC, and Title 24 requirements |
Installation & Wiring Guidelines
- Power Safety: Always turn off circuit breakers supplying the junction box and test that power is dead before beginning installation.
- High-Voltage Wiring: Insert the threaded nipple through a 1/2-inch knockout on a 4"x4" junction box and secure with the provided locknut. Connect the Black wire to AC Line Hot (120–277V), White to AC Neutral, and Red to the switched lighting Load.
- Low-Voltage Class 2 Connections: Route the low-voltage Class 2 control leads to the occupancy sensor: Connect the Red wire (+24V DC power) to the sensor power lead, Black (DC Common Return) to the sensor common, and Blue (Occupancy Control Input) to the sensor trigger signal lead.
- Parallel Sensor Rule: If multiple sensors are wired to a single LCA2285, tie all sensor red leads together to the power pack red lead, black to black, and blue to blue. If using multiple power packs on a shared circuit, tie the blue and black leads together across packs, but never connect the red (+24V DC) leads of two separate power packs together.
Frequently Asked Questions
What is the primary function of the Philips OccuSwitch LCA2285?
The LCA2285 converts 120–277V line-voltage AC power into regulated 24V DC power (up to 150mA) to run low-voltage occupancy and daylight sensors, while housing a 20A relay that physically switches the lighting load on and off based on signals received from the connected sensors.
What is the difference between the LCA2285 and LCA2287 power packs?
Both models offer 120–277V line voltage operation, 24V DC 150mA output, and a 20A primary lighting relay. The LCA2287 includes an additional dry-contact auxiliary relay (rated 0.5A @ 120V AC / 1A @ 30V DC) intended for coordinating with building HVAC or EMS systems, whereas the LCA2285 is dedicated to lighting control.
Can a single LCA2285 power multiple low-voltage occupancy sensors?
Yes. The 150mA regulated 24V DC output can comfortably support 3 to 5 typical low-voltage occupancy sensors (assuming average draw of 25–40mA each). Simply sum the milliamp current requirements of your sensors to ensure they remain within the 150mA total envelope.
Spec Sheets
Download the official manufacturer documentation and specifications:
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Additional Information
Our Part No: |
BSF-PHLPS-LCA2285 |
Mfr Part #: |
LCA2285/00 |
Manufacturer Material Code: |
912400473978 |
Brand: |
Philips Dynalite OccuSwitch |
Fixture Type: |
Power Supply |
Input Voltage: |
120-277V (Universal) |
Control Power Output: |
150mA, 24VDC |
Lighting Load Max: |
20A |
Product Data Sheet: |
See PDF Link Provided |
Dimensions: |
3.81” W × 2.40” H × 1.43” D with a 0.50” threaded nipple |
Features: |
Auto ON |
Warranty: |
Manufacturer's |
Case Size: |
ea |
