video321 said:
Maybe not supervised in the normal sense, but since it requires power and is NC if any of those wires are cut/damaged then it will fail.
Nope..if the unit is NC and you short out the pair feeding the zone, no alarm or change of state, ever. The only way a powered NC detector or device would be considered supervised in the manner you're stating would be if the relay changes state on removal of power, but that is only at the device, not any of the conductors feeding it. Toss a ground fault on the unit with it wired NC and the zone will never change state as long as it's not the +12V conductor which would kick out the aux supply.
Here's the issue with the OP.....He's using a PD9 with an external wall wart (bad idea to begin with). There's no backup battery power and the wall wart is not suitable to run the unit or the PD9 in this application. If you were doing something like cameras with the PD9, sure, but for an alarm, no.
The PD9 needs to be connected to a suitable backup power supply and battery, like an Altronix unit or those that Elk's 624....then you need to make the PD9 and the M1 common by connecting the negative of both units together (Aux - and the PD9's -).
I'm willing to wager that the PD9 is both underpowered for the loads attached to it, combined with the low voltage and wall wart not to mention it doesn't have a common negative, so the 2600 doesn't have a common ground reference to the panel that the 2600 is tied to the zone....
To prove this without fixing the supply and voltage issue, power the 2600 off the panel's aux directly and then wire appropriately to the panel's zone. I can't recall if the water ZT is NO or NC.
While it may be possible you have a bad unit, I'd eliminate a power issue and the circuit issue first.
