The Edwards EST SIGA-OSHCD is an intelligent addressable multisensor detector for Signature Series loops. It combines advanced optical smoke sensing with rate-of-rise heat and supervised CO monitoring to identify slow-smoldering and fast-flaming fires while supervising for carbon monoxide. Self-diagnostics, environmental compensation, and a green/red status LED support dependable performance at a glance.

Key Specifications:
Type: Intelligent addressable multisensor
Core Function(s): Optical smoke; rate-of-rise heat with fixed 135 °F; supervised CO
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 CO and fire tone separation)
SIGA-AB4GT – Audible sounder base (use with SIGA-TCDR for CO and fire 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 CO and fire tone separation

System Compatibility:
Signature Series control panels using a Signature loop controller.

Replaces: SIGA-PHCD