D9057B Addressable Detector Base with Isolator

The D9057B is an isolator base used to protect the fire alarm system from short-circuit faults. When a short circuit occurs on the loop, the base responds quickly and automatically isolates the damaged section. Once the fault is cleared, the base automatically exits isolation mode and reconnects the previously disconnected part back into the system. The device does not require coding and does not occupy an address in the system loop.

Features:
- Operates without occupying an address and takes up no space in the system loop
- Can be used for an individual device (point isolation) as well as for a group of devices (area isolation)
- Equipped with a yellow LED indicator that remains constantly lit during active isolation and turns off during normal operation