Overview
The Edwards 502A is a heavy-duty door jamb light switch designed for commercial and industrial applications. Manufactured by Edwards Signaling, this door light switch delivers reliable momentary control at 120V AC with a 6 amp contact rating. The normally closed configuration ensures the switch activates when the door opens, energizing lights or door ajar alarms without additional wiring complexity.
Key Features
- 120V AC, 6 amp contact rating for reliable door light control
- Normally closed (1NC) contact configuration—ideal for door-actuated lighting
- Plunger actuator responds to door jamb pressure
- Flush-mount design fits standard door frame openings
- Wired terminals for straightforward installation
- Gray finish faceplate resists corrosion and weathering
- Works with sliding and hinged doors of various types
Technical Specifications
- Voltage: 120V AC
- Current Rating: 6 Amperes
- Contact Configuration: 1 Normally Closed (1NC)
- Actuator Type: Plunger
- Mounting Style: Flush
- Termination: Wire Terminal
- Finish: Painted Gray
Typical Applications
- Closet door automatic lighting
- Dark room or storage area lights
- Walk-in refrigerator and freezer door switches
- Door-open alarm annunciation
- HVAC damper or duct control triggered by door position
Compatibility & Replacements
Compatible With
- Standard 120V AC lighting circuits and loads up to 6 amperes
- Momentary-contact door control circuits
- Commercial building automation systems using hardwired sensors
- Both sliding and hinged door installations
Replaces / Drop-In Replacement For
- Earlier Edwards 502A units (direct replacement within Series 500)
- Verify exact fit and contact configuration with original equipment before substitution
Works With
- Any 120V AC control relay or solenoid (up to 6A load)
- Door frame mounting hardware with 3 1/4″ hole centers
- Flush-mount electrical boxes and door jamb assemblies
- Hardwired 120V AC circuits (no network connectivity required)
