Edwards SIGA-OSCD is a Signature Optica Series intelligent multisensor detector that combines optical smoke sensing with carbon monoxide detection in one addressable head for Signature Series loops.
It uses dual optical wavelengths and multiple detection angles, with digital filters and ratio tests that reject signal patterns typical of nuisance sources such as cooking particulates. The smoke sensor is analyzed independently from the CO sensor, so the SIGA-OSCD can initiate a fire alarm, a life-safety CO alarm, or both. The head is supplied on its own; a compatible base is a separate catalog number.
Specifications
| Operating voltage |
15.20 to 19.95 VDC |
| Normal / alarm current |
32 µA / 45 µA |
| Smoke sensitivity |
UL/ULC: 0.5 to 4.36 %/ft. obscuration |
| UL CO alarm level |
70 ppm 60 to 240 min; 150 ppm 10 to 50 min; 400 ppm 4 to 15 min |
| CO sensor life |
10 years from date of manufacture, or when the panel indicates end of life |
| Wall mounting |
12 in. (305 mm) max. from ceiling |
| Operating environment |
32 to 120°F (0 to 49°C), 0 to 90% RH, noncondensing |
| Construction |
High impact polymer, white; bicolor green/red LED |
| Compatible testers |
Testifire 1000, Testifire 2000 |
| Approvals |
UL 268-7, UL 2075, CSFM; ULC CAN/ULC-S529 and CAN/CSA 6.19 |
| Ship weight |
0.4 lb (0.16 kg) |
Compatible with
Related models
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SIGA-OSD: same Signature Optica optical platform without the CO sensor.
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SIGA-OSHD: Optica smoke plus rate-of-rise and 135°F fixed heat.
Installation notes
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Replacement clock: replace every ten years from manufacture or at the panel end-of-life indication, whichever comes first. EST3 and EST3X panels support 6-year life timing.
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End of life: the panel shows COMMON TRBL ACT, and Details shows END OF LIFE ACT until the detector is replaced.
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Codes: install per NFPA 72, NFPA 720 and UL 2075.
FAQ
Does the SIGA-OSCD need a base? Yes. The head ships alone and mounts on a separate Signature base.
How long does the CO sensor last? Ten years from the date of manufacture, or until the panel signals end of life.
More smoke and CO detectors.
Specifications from the Edwards data sheet E85001-1002, Issue 1.6. Manufacturer specifications are subject to change without notice.
