Edwards EST SIGA-IB4 Fault Isolator Base, 4-inch

The Edwards EST SIGA-IB4 is a 4-inch detector mounting base with a built-in line fault isolator for Signature Series loops. It 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 includes a matching trim skirt. Remote alarm LED is not supported. Includes: SIGA-TS4 Trim Skirt Key Specifications: Type: 4-inch 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, 4 in square, BESA, and 75 mm European 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; trim skirt included Variants: SIGA-IB - Fault isolator base 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 System Compatibility: Signature Series control panels using a Signature loop controller.