500 Series Direct Wire

2-Wire
Smoke Detector, Photoelectric, 2-wire, 12/24VDC, S10A, UL Listed 511C The 500 series self-diagnostic, 2-wire smoke detectors are conventional direct-wire detectors with ... Learn More
Smoke Detector, 500 Series, Photo, 2-wire, CleanMe®, 6-24VDC 521B The 500 Series self-diagnostic, two & four wire smoke detectors are conventional direct-wire smoke d... Learn More
Smoke Detector, 500 Series, Photo, 2-wire, CleanMe®, 6-24VDC, 10-Pack 521B-10PKG The 500 series self-diagnostic, 2-wire smoke detectors are conventional direct-wire detectors with ... Learn More
Smoke Detector, 500 Series, Photo, 2-wire, CleanMe®, heat, 6-24VDC 521BXT The 500 Series self-diagnostic, two & four wire smoke detectors are conventional direct-wire smoke d... Learn More
Smoke Detector, 500 Series, Photo, 2-wire, CleanMe®, Heat, 6-24VDC, Pack of 10 521BXT-10PKG The 500 series self-diagnostic, 2-wire smoke detectors are conventional direct-wire detectors with ... Learn More
Smoke Detector, 500 Series, Replaced by 521NCRXT 521CRXT The 500 series self-diagnostic, 2-wire smoke detectors are conventional direct-wire detectors with ... Learn More
Smoke Detector, NetworX PID, Photo, 2-wire, CleanMe®, 12-24VDC 521CXT-ID The 500 series self-diagnostic, 2-wire smoke detectors are conventional direct-wire detectors with ... Learn More
Smoke Detector, 500 Series, Photo, 2-wire, CleanMe®, Aux. Relay, 12-24VDC, UL, cUL 521NCRXT The 500N series two- and four-wire conventional photoelectric smoke detectors bring together trusted... Learn More
Smoke Detector, 500 Series, Photo, 2-wire, CleanMe®, Sounder, Aux. Relay, 12-24VDC, UL, cUL 521NCSRXT The 500N series two- and four-wire conventional photoelectric smoke detectors bring together trusted... Learn More
Smoke Detector, 500 Series, Photo, 2-wire, CleanMe®, Sounder, 12-24VDC, UL, cUL 521NCSXT The 500N series two- and four-wire conventional photoelectric smoke detectors bring together trusted... Learn More
Smoke Detector, 500 Series, Photo, 2-wire, CleanMe®, Sounder, 12-24VDC, UL, cUL, 10 Pack 521NCSXT-10PKG The ESL 500N series two- and four-wire conventional photoelectric smoke detectors bring together tru... Learn More
4-Wire
Smoke Detector, 500 Series, Photo, 4-Wire, 6-24VDC, UL 541AXT The 500 series self-diagnostic, 4-wire smoke detectors are conventional direct-wire detectors with a... Learn More
Smoke Detector, 500 Series, Photo, 4-Wire, 12-24VDC, UL 541C The 500 Series self-diagnostic, two & four wire smoke detectors are conventional direct-wire smoke d... Learn More
Smoke Detector, 500 Series, Photo, 4-Wire, 12-24VDC, UL, 10-Pack 541C-10PKG The 500 series self-diagnostic, 4-wire smoke detectors are conventional direct-wire detectors with ... Learn More
Smoke Detector, 500 Series, Photo, 4-Wire, Heat, 12/24VDC, UL 541CXT The 500 Series self-diagnostic, two & four wire smoke detectors are conventional direct-wire smoke d... Learn More
Smoke Detector, 500 Series, Photo, 4-Wire, Heat, 12/24VDC, UL 541CXT-10PK The 500 series self-diagnostic, 4-wire smoke detectors are conventional direct-wire detectors with a... Learn More
Smoke Detector, 500 Series, Replaced by 541C 541NB The 500N series two- and four-wire conventional photoelectric smoke detectors bring together trusted... Learn More
Smoke Detector, 500 Series, Replaced by 541C-10PKG 541NB-10PK The 500N series two- and four-wire conventional photoelectric smoke detectors bring together trusted... Learn More
Smoke Detector, 500 Series, Photo, 4-Wire, Heat, 12/24VDC, UL, cUL 541NBXT The 500N series two- and four-wire conventional photoelectric smoke detectors bring together trusted... Learn More
Smoke Detector, 500 Series, Replaced by 541CXT-10PKG, UL 541NBXT-10PKG The 500N series two- and four-wire conventional photoelectric smoke detectors bring together trusted... Learn More
Smoke Detector, 500 Series, Photo, 4-Wire, Heat, Aux. Relay, 12/24VDC, UL, cUL 541NCRXT The 500N series two- and four-wire conventional photoelectric smoke detectors bring together trusted... Learn More
Smoke Alarm, 500 Series, Photo, 4-Wire, Sounder, Aux. Relay, Isolated System Heat, 12/24VDC, UL, cUL 541NCSRH The 500N series two- and four-wire conventional photoelectric smoke detectors bring together trusted... Learn More
Smoke Detector, 500 Series, Photo, 4-Wire, Sounder, Aux. Relay, Heat, 12/24VDC, UL, cUL 541NCSRXT The 500N series two- and four-wire conventional photoelectric smoke detectors bring together trusted... Learn More
Smoke Detector, 500 Series, Photo, 4-Wire, Sounder, Heat, 12/24VDC, UL, cUL 541NCSXT The 500N series two- and four-wire conventional photoelectric smoke detectors bring together trusted... Learn More
Smoke Detector, 500 Series, Photo, 4-Wire, Sounder, Heat, Power Supv. Relay, 12/24VDC, UL, cUL 541NCSXTE The 500N series two- and four-wire conventional photoelectric smoke detectors bring together trusted... Learn More
Smoke Detector, 500 Series, Photo, 4-Wire, Heat, Power Supv. Relay, 12/24VDC, UL, cUL 541NCXTE The 500N series two- and four-wire conventional photoelectric smoke detectors bring together trusted... Learn More
Accessories
Smoke Detector Accessory , Adaptor plate fits 500 Series to 400 Series footprint 500-PLT-5PKG Adaptor plate matches 500 Series to 400 Series footprint. Learn More

2-Wire

Smoke Detector, Photoelectric, 2-wire, 12/24VDC, S10A, UL Listed

Smoke Detector, 500 Series, Photo, 2-wire, CleanMe®, 6-24VDC

Smoke Detector, 500 Series, Photo, 2-wire, CleanMe®, 6-24VDC, 10-Pack

Smoke Detector, 500 Series, Photo, 2-wire, CleanMe®, heat, 6-24VDC

Smoke Detector, 500 Series, Photo, 2-wire, CleanMe®, Heat, 6-24VDC, Pack of 10

Smoke Detector, 500 Series, Replaced by 521NCRXT

Smoke Detector, NetworX PID, Photo, 2-wire, CleanMe®, 12-24VDC

Smoke Detector, 500 Series, Photo, 2-wire, CleanMe®, Aux. Relay, 12-24VDC, UL, cUL

Smoke Detector, 500 Series, Photo, 2-wire, CleanMe®, Sounder, Aux. Relay, 12-24VDC, UL, cUL

Smoke Detector, 500 Series, Photo, 2-wire, CleanMe®, Sounder, 12-24VDC, UL, cUL

Smoke Detector, 500 Series, Photo, 2-wire, CleanMe®, Sounder, 12-24VDC, UL, cUL, 10 Pack

4-Wire

Smoke Detector, 500 Series, Photo, 4-Wire, 6-24VDC, UL

Smoke Detector, 500 Series, Photo, 4-Wire, 12-24VDC, UL

Smoke Detector, 500 Series, Photo, 4-Wire, 12-24VDC, UL, 10-Pack

Smoke Detector, 500 Series, Photo, 4-Wire, Heat, 12/24VDC, UL

Smoke Detector, 500 Series, Photo, 4-Wire, Heat, 12/24VDC, UL

Smoke Detector, 500 Series, Replaced by 541C

Smoke Detector, 500 Series, Replaced by 541C-10PKG

Smoke Detector, 500 Series, Photo, 4-Wire, Heat, 12/24VDC, UL, cUL

Smoke Detector, 500 Series, Replaced by 541CXT-10PKG, UL

Smoke Detector, 500 Series, Photo, 4-Wire, Heat, Aux. Relay, 12/24VDC, UL, cUL

Smoke Alarm, 500 Series, Photo, 4-Wire, Sounder, Aux. Relay, Isolated System Heat, 12/24VDC, UL, cUL

Smoke Detector, 500 Series, Photo, 4-Wire, Sounder, Aux. Relay, Heat, 12/24VDC, UL, cUL

Smoke Detector, 500 Series, Photo, 4-Wire, Sounder, Heat, 12/24VDC, UL, cUL

Smoke Detector, 500 Series, Photo, 4-Wire, Sounder, Heat, Power Supv. Relay, 12/24VDC, UL, cUL

Smoke Detector, 500 Series, Photo, 4-Wire, Heat, Power Supv. Relay, 12/24VDC, UL, cUL

Accessories

Smoke Detector Accessory , Adaptor plate fits 500 Series to 400 Series footprint