Gentex SR (917-0071-002) Multi-Criteria Smoke Alarm with Relay, 120VAC

The Gentex SR (917-0071-002) is a 120 VAC multi-criteria photoelectric smoke alarm with auxiliary relay contacts and 9V battery backup, designed for single- and multiple-station fire warning applications. It combines photoelectric light-scattering detection with an 85 dBA audible alarm at 10 feet, Temporal-3 evacuation signaling, and one set of Form A/Form C relay contacts for compatible auxiliary equipment. Featuring tandem interconnection, a push-button test function, and low-battery notification, the SR is ANSI/UL 217, 9th Edition Listed for residential and commercial residential occupancies, including apartments, hotels, and motels.

Gentex SR 917-0071-002 Multi-Criteria Photoelectric Smoke Alarm with Relay, 120 VAC

The Gentex SR (917-0071-002) Multi-Criteria Smoke Alarm provides early smoke detection, audible evacuation signaling, and auxiliary relay operation for residential and commercial residential fire protection applications. Part of the Gentex S/C/SC/H Series, the SR uses multi-criteria sensing that incorporates photoelectric light-scattering technology to detect smoke while reducing unwanted alarms. Its integrated 85 dBA piezoelectric horn, 9V alkaline battery backup, and Form A/Form C relay contacts support occupant notification and connections to compatible auxiliary equipment. The alarm is designed for dwelling units in single-family homes, apartment buildings, hotels, motels, and similar occupancies where hardwired smoke detection and local evacuation notification are required.

The SR operates from a 120 VAC, 60 Hz electrical supply with a rated operating current of 0.055 amperes and uses a replaceable 9V Duracell MN1604 alkaline battery for emergency backup during AC power interruptions. Its smoke sensing chamber has a nominal sensitivity of 2.5% obscuration, while the audible signaling circuit produces a Temporal-3 evacuation pattern at a nominal 3,100 Hz horn frequency. One set of auxiliary Form A/Form C relay contacts supports programmable activation for compatible remote annunciation or control applications, subject to the manufacturer's contact ratings. Additional operating features include push-button self-testing, alarm memory, a 10-year end-of-life indicator, and visual LED status indication. A green LED indicates AC power availability, while a red LED pulses periodically during normal sensing operation.

For interconnected fire warning installations, the Gentex SR supports tandem operation with compatible Gentex smoke, heat, carbon monoxide, and combination smoke/CO alarms. The manufacturer's DUALINK technology allows interconnected devices to communicate alarm conditions and produce the appropriate audible warning pattern. Smoke alarms use Temporal-3 signaling, while compatible interconnected carbon monoxide alarms use Temporal-4 signaling to distinguish CO emergencies from smoke events. The SR also provides auxiliary relay contacts for approved remote signaling and equipment interfaces, allowing integration with compatible monitoring or control equipment when installed according to Gentex wiring requirements. Supported interconnection models include selected S, SR, STRR, SHRR, SC, SCR, SCRR, C, CR, and H Series devices. Compatibility with older Gentex alarm families and existing wiring harnesses must be verified before replacement or system expansion.

The Gentex SR measures approximately 5.5 inches in diameter and 1.75 inches deep and includes a quick-disconnect wiring harness, front-loading battery compartment, and mounting hardware compatible with standard electrical junction boxes. Its operating temperature range is 40 F to 100 F (4.4 C to 37.8 C), making it suitable for protected indoor environments. Installation features include an insect-screened sensing chamber, removable construction dust cover, and low- or missing-battery warning. The SR is ANSI/UL 217, 9th Edition Listed and is documented for applications governed by applicable NFPA 72 and residential building code requirements. Gentex provides a one-year limited manufacturer warranty and recommends weekly functional testing. Unlike the STRR and SHRR models, the SR provides smoke detection and one set of auxiliary relay contacts without an integrated heat sensor. Proper placement, electrical connections, relay loading, and replacement compatibility should be verified against current Gentex installation instructions.