Edwards EST SIGA-IB4


4-Inch Detector Mounting Base with Fault Isolator, comes with Trim Skirt

Available with Lead Time

  • Factory New
Brand: EST FireAlarm.com Part #: 057804 Categories: , , Manufacturer Part #: SIGA-IB4 Tag:


The SIGA-IB is a Signature Series detector base with a built-in line fault isolator for use on a Class A signaling line circuit (SLC). It does not operate without a detector and does not support the SIGA-LED.

The isolator operates as follows: A short on the line causes all isolators to open within 23 ms; at 10 ms intervals, beginning on the side of the Class A circuit nearest the loop controller, the isolators close to provide the next isolator down the line with power; when the isolator next to the short closes, it reopens within 10 ms. The process repeats beginning on the other side of the loop controller.


Weight 0.20 lbs


Material Qualities


Base Type



Intelligent Smoke Detector; SIGA-PD
Edwards – Data Sheet
Detector Base; SIGA-IB
Edwards – Installation Sheet


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