.Signature Smoke wired as a 2 wire smoke

[Leo]

The Signature smoke (siga-PS/PHS) can be used as a 2 wire smoke.

Found this by accident, a contractor wired a siga-PH to a hard wire zone and it just worked.
So I called EST and he said it would work, but that is all he said, he had no paper work to read.

[CANTECH]

Yes they work, but they are not listed for that application.

It is a nice feature when you do a panel transfer and are replacing the detectors. But on paper it is not officially working.

Beware

[Chanwh898]

Yes, the detector should work like in standalone mode, where power is available but no communication with the loop card.

[gururaja20]

Dear Friend,
I cant understand your explanation, could you explain the same

[Leo]

There are two types of smoke detectors (intelligent / hardwired)
The siga-PS/PHS are intelligent devices they communicate on a SLC line.
by accident I found that the siga-PS/PHS will also work as a hardwired 2 wire smoke detector.