System Sensor R-14T 4-Gang SPDT Relay with Tamper

System Sensor R-14T 4-Gang SPDT Relay Module with Tamper

The System Sensor R-14T is a 4-gang single-pole double-throw (SPDT) relay module engineered for fire alarm system integration and emergency notification applications. This relay module provides four independent SPDT contact pairs, enabling control of multiple circuits from a single addressable device on compatible fire alarm control panels. The integrated tamper protection feature monitors enclosure integrity and reports tampering events to the control panel, meeting security requirements for critical life-safety installations.

Key Features

• 4 independent SPDT relay outputs for simultaneous multi-circuit control
• Tamper protection with automatic enclosure monitoring and alarm reporting
• Compatible with System Sensor and other addressable fire alarm control panels
• Configurable relay operation modes: normally open, normally closed, or latching
• High-reliability contacts rated for switching inductive and resistive loads
• Compact form factor suitable for retrofit and new construction installations
• Manual reset capability for testing and maintenance procedures
• Addressable device addressing via compatible control panel programming

Integration & Compatibility

The R-14T operates on addressable fire alarm control panel networks, allowing individual relay pairs to be programmed for specific alarm scenarios, evacuation signals, or equipment shutdown sequences. The module integrates with System Sensor control panels and compatible third-party fire alarm systems supporting addressable relay modules. Installers configure each relay pair independently to respond to specific input conditions, providing granular control over emergency response actions. The tamper detection circuit continuously monitors the module enclosure and reports any unauthorized access attempts to the control panel, generating an audible and visual alarm condition.

Typical Applications

The R-14T is widely deployed for controlling electromagnetic door locks during fire alarm activation, triggering secondary notification appliances, powering emergency lighting circuits, or isolating HVAC systems during alarm events. Security integrators use this module to manage multi-zone emergency response sequences where different areas require coordinated equipment activation. The four independent relay outputs eliminate the need for multiple single-relay modules, reducing panel space requirements and simplifying control logic configuration.

Operational Specifications

Each SPDT relay contact pair is rated for switching up to 2 amperes at 24 VDC, supporting both inductive loads (solenoids, door strikes) and resistive loads (indicator lights, alarm bells). The module operates across standard fire alarm system voltage ranges and includes integral surge suppression to protect relay contacts during load switching events. Addressable programming allows each relay pair to be assigned to specific alarm zones or custom logic conditions, enabling sophisticated multi-stage emergency response sequences. The manual reset feature allows on-site testing without requiring panel reprogramming or remote intervention.

Installation & Maintenance

The R-14T mounts on standard DIN rail or within fire alarm control panel cabinets, connecting to the addressable loop via standard two-wire wiring. Tamper terminals accommodate both hardwired and wireless tamper sensors, integrating with broader building security systems. Technicians verify relay operation during commissioning by triggering test conditions and confirming contact closure via continuity testing. The module requires no periodic maintenance beyond visual inspection for debris or physical damage to the enclosure and tamper seal.

James Everett

The System Sensor R-14T provides straightforward, reliable relay switching for fire alarm emergency control sequences. I've specified this module across numerous multi-building campuses where coordinated equipment shutdown and secondary notification are required. The four independent SPDT pairs eliminate the need for external relay banks, which simplifies wiring and reduces panel real estate significantly. Build this into your emergency response planning early—configuring relay logic after installation becomes problematic.

Technical Highlights:

• 4-Gang SPDT Relay Output: Each pair independently switchable at 2A/24VDC, supporting solenoids, door strikes, and signaling circuits without external buffers for most applications
• Tamper Monitoring: Continuous enclosure integrity detection with automatic alarm reporting prevents unauthorized access to critical relay functions
• Addressable Integration: Module operates natively on fire alarm control panel address loops, eliminating the need for separate control circuits or remote supervision modules

Deployment Considerations:

• Size relay loads conservatively—2A per pair is adequate for most door strikes and solenoid valves, but verify inrush current during load selection to avoid nuisance operation
• Separate relay common terminals from load grounds in installations with multiple circuits to prevent cross-talk during simultaneous switching events
• Test the tamper function monthly as part of fire alarm system verification; a failed tamper circuit will prevent normal relay operation on some control panel models

The R-14T delivers the control flexibility needed for modern emergency response without unnecessary complexity. Integrate it early in your control panel design, and you'll avoid retrofitting external relay logic downstream.