System Sensor R-20E Single DPDT Relay with EOL

System Sensor R-20E Single DPDT Relay with EOL

Overview

The System Sensor R-20E is a single DPDT relay module with end-of-line (EOL) supervision designed for fire alarm, access control, and life safety system integration. Operating at 24 VDC and rated for 10 A at 125/250 VAC, the R-20E handles door strike actuation, alarm signal routing, and supervisory relay switching in networked control systems. The EOL supervision architecture enables remote status monitoring and fault detection across distributed installations, eliminating the guesswork on relay state from the main panel.

Compatibility

The R-20E integrates with System Sensor control panels and conventional fire alarm systems requiring relay-based switching logic. It is compatible with access control integration schemes that rely on supervised relay feedback and TCP/IP or hardwired EOL monitoring. The 24 VDC power requirement aligns with standard fire alarm and security system DC supply infrastructures. Confirm compatibility with your specific panel or third-party management platform before procurement, as EOL protocol variants may differ across system architectures.

Installation Notes

Wire the R-20E into your 24 VDC supply loop with proper EOL resistor termination (exact ohm value determined by your control panel manufacturer—typically 2.2 kΩ to 10 kΩ). The relay switch contacts rated 10 A at 125/250 VAC can handle most door strike and solenoid loads; verify your actual strike current draw does not exceed this limit. Mount the module in a DIN-rail or panel enclosure with adequate ventilation. No special tools required beyond standard wire strippers and a flathead screwdriver for terminal connections.