System Sensor R-20T Single DPDT Relay with Tamper

System Sensor R-20T Single DPDT Relay with Tamper

Overview

The System Sensor R-20T is a single DPDT (double-pole, double-throw) relay module designed for integration with fire alarm and building automation systems. This compact relay provides reliable switching control with integrated tamper detection, making it suitable for applications requiring secure signal transmission and contact monitoring in access control, alarm monitoring, and auxiliary circuit management.

Key Features

• Double-Pole, Double-Throw (DPDT) Configuration: Provides two independent switching circuits in a single module, enabling flexible control of multiple devices or circuits simultaneously
• Integrated Tamper Detection: Built-in tamper switch monitors enclosure integrity and alerts the system to unauthorized access or physical interference
• Compact Design: Space-efficient form factor suitable for installation in control panels, junction boxes, and integrated alarm system architectures
• Reliable Contact Switching: Electrically rated contacts deliver consistent performance across security, access control, and fire alarm applications
• Industry-Standard Integration: Compatible with System Sensor control panels and third-party fire alarm management platforms requiring auxiliary relay functionality
• Durable Construction: Engineered for long-term reliability in both indoor and temperature-controlled environments typical of commercial and institutional installations

Integration & Compatibility

The R-20T relay integrates with System Sensor fire alarm control panels and monitoring stations. The DPDT relay configuration allows integrators to control multiple circuits from a single monitoring input, reducing panel connections and simplifying system design. Tamper detection output provides real-time enclosure status reporting to the control panel, enhancing system security and audit trail compliance. This makes the R-20T valuable in applications requiring dual-circuit control with built-in tamper monitoring, such as remote device activation, zone isolation circuits, and auxiliary alarm signal routing.

Applications

Security integrators and fire alarm technicians deploy the R-20T in multi-circuit control scenarios, including door strike relay backup, siren/strobe circuit switching, remote sensor activation, and alarm signal routing. The tamper detection capability ensures that relay enclosures remain secure throughout system operation, providing continuous monitoring for physical tampering attempts. This makes it particularly valuable in facilities requiring uninterrupted alarm system integrity and access control audit documentation.

James Everett

During system architecture planning, the System Sensor R-20T consistently appears in dual-circuit applications where integrators need reliable relay switching paired with tamper monitoring. The DPDT configuration and integrated tamper detection address a common integration challenge: controlling multiple devices from a single input signal while maintaining enclosure security.

Technical Highlights:

• DPDT Switching: Two independent relay circuits allow simultaneous control of separate alarm functions, reducing the need for multiple relay modules and simplifying wiring schemes
• Tamper Monitoring: Integrated tamper switch provides continuous enclosure status reporting, enabling compliance with security audit requirements and unauthorized access detection

Deployment Considerations:

• Verify control panel compatibility before specifying the R-20T in retrofit installations; older panels may require firmware updates for tamper signal processing
• Plan circuit routing carefully to maximize the dual-circuit benefit; many integrators underutilize the second circuit due to insufficient initial planning
• Test tamper functionality during commissioning to confirm panel receives and logs tamper events correctly

The R-20T delivers straightforward, reliable relay switching with genuine tamper detection—no unnecessary complexity. For integrators managing multi-circuit control requirements, this module reduces panel clutter and provides documented security monitoring without additional hardware investment.