Edwards SIGA-COD — intelligent addressable carbon monoxide detector for Signature Series loops, sensing carbon monoxide only.
The detector converts analog readings from an electrochemical CO cell into digital signals, and an on-board microprocessor tracks them over time, filtering out patterns not typical of a real CO event.
- Electrochemical CO cell with a ten-year life; reports a trouble at end of life
- Certified to UL 2075 and evaluated to the CO alarm sensitivity limits of UL 2034
- Operating voltage 15.20 to 19.95 VDC; 51 µA normal, 68 µA in alarm
- Works only with the Signature Loop Controller; 250 devices per loop
- Mounts on the SIGA-SB, SIGA-RB and SIGA-IB bases and their 4-inch versions
- Sounder bases SIGA-AB4GT and SIGA-AB4G-LF need a SIGA-TCDR tone generator for the CO pattern
- 32 to 120°F, 0 to 90 percent RH noncondensing
The SIGA-COD-CA is the Canadian-market version, certified instead to CAN/CSA 6.19. Do not substitute a Signature Optica SIGA-OSHCD, which adds photoelectric smoke and heat sensing: a job needing smoke detection is not covered by the CO-only SIGA-COD.
Documents
FAQ
Does the SIGA-COD detect smoke?
No. It senses carbon monoxide only. For smoke plus CO in one head, Edwards offers the Signature Optica SIGA-OSCD.
How long does the CO cell last?
The CO sensor has a 10-year life from the date of manufacture; at end of life the detector signals a trouble condition to the panel.
Is the base included?
No. It mounts on Signature bases such as the SIGA-SB standard, SIGA-RB relay, SIGA-IB isolator or SIGA-AB4GT sounder base.
What CO levels trigger an alarm?
Per UL 2034: 70 ppm in 60 to 240 minutes, 150 ppm in 10 to 50 minutes, and 400 ppm in 4 to 15 minutes.
