Edwards EST SIGA-IB Fault Isolator Base

The Edwards EST SIGA-IB is a detector mounting base with a built-in line fault isolator for Signature Series loops. It automatically opens on a short to keep the rest of a Class A SLC operating, then periodically re-energizes to restore service when the fault clears. The base provides room-side terminals, mounts to common North American and European back boxes, and does not support a remote alarm LED. Key Specifications: Type: Fault isolator detector base for Signature Series heads Core Function(s): Built-in SLC isolator for Class A circuits; opens on short and auto-restores after fault clears Loop/Protocol: Signature Series SLC LED Support: Remote alarm LED not supported Mounting: Fits 1-gang, 3.5 in and 4 in octagon, and European/BESA boxes with 60.3 mm centers Wire Size: 12 to 18 AWG conductors; 16 to 18 AWG preferred Operating Range: 32 to 120 °F; 0 to 93 percent RH, non-condensing Notes: High-impact white polymer housing; room-side accessible screw terminals Variants: SIGA-IB4 - 4-inch fault isolator base with trim skirt Compatible Detectors: SIGA-OSD - Photoelectric smoke detector SIGA-HFD - Fixed-temperature heat detector 135 °F SIGA-HRD - Rate-of-rise heat detector with 135 °F fixed SIGA-COD - Carbon monoxide detector SIGA-OSHD - Optical smoke and heat multisensor SIGA-OSCD - Optical smoke and CO multisensor SIGA-OSHCD - Optical smoke, heat, and CO multisensor Compatible Accessories: SIGA-TS - Trim skirt for non 4-inch bases System Compatibility: Signature Series control panels using a Signature loop controller.