Edwards SIGA-IM2 Intelligent Signature Isolator Module-Smoke DetectorsThe Edwards SIGA IM2 Isolator Module is an addressable device that protects a signaling line circuit (SLC) from a to wire to wire short. The SIGA IM2 module monitors line voltages and opens the data to detect a short, isolating the short between the two modules located closest to the short. The loop controller assigns an address to the SIGA IM module. The module uses one detector address on the SLC. Specifications Weight 0. 2 lbs Brand Edwards Open