Edwards EST SIGA-HCD Heat and CO Detector

The Edwards EST SIGA-HCD is an intelligent addressable heat and CO multisensor for Signature Series loops. It combines rate-of-rise heat with a 135 °F fixed threshold and supervised carbon monoxide monitoring. On-board processing with environmental compensation and self-diagnostics helps reduce nuisance alarms, and a green/red status LED provides clear status at a glance. Key Specifications: Type: Intelligent addressable heat and CO multisensor Core Function(s): Rate-of-rise heat 15 °F/min with fixed 135 °F; supervised CO monitoring Loop/Protocol: Signature Series SLC Power: 15.20 to 19.95 VDC Indicators/UI: Bi-color status LED Operating Range: 32 to 100 °F; 0 to 90% RH, non-condensing Notes: CO sensor service life 10 years or until panel end-of-life indication Compatible Bases & Accessories: SIGA-SB – Standard base SIGA-SB4 – 4-inch standard base with trim skirt SIGA-RB – Relay base SIGA-RB4 – 4-inch relay base with trim skirt SIGA-IB – Fault isolator base SIGA-IB4 – 4-inch fault isolator base with trim skirt SIGA-AB4G-LF – 520 Hz low-frequency sounder base (use with SIGA-TCDR for fire and CO tone separation) SIGA-AB4GT – Audible sounder base (use with SIGA-TCDR for fire and CO tone separation) SIGA-LED – Remote alarm LED for SB/SB4 bases SIGA-TS4 – Trim skirt for 4-inch bases SIGA-TCDR – Temporal pattern generator for fire and CO tone separation System Compatibility: Signature Series control panels using a Signature loop controller.