I Repurposed an Old ADT Security System.
The Final System will have My MS-51, My 4251-20, My SPR, and My SPSRL. Hopefully an i3, a Genesis LED Speaker Strobe, and a L Series Strobe Expander Plate.
What do you mean by “repurposed an old ADT security system” exactly? No part of your planned setup seems to use such components/devices.
1 Like
I reused the Old Wires from the Motion Detectors and Reused the Old Panel Box in the Basement to Join the L Series with My 4251-20 and the Amplifier. Instead of Putting up New Wires I 
Reused the Old Motion Detector Wires that are in the Wall.
If I can Figure out how to use the Old Annunciator, I might be able to use that as a Fire Alarm Panel.
Ah okay, that’s kinda what I thought. Clever!
If by “annunciator” you mean “keypad”, I’m afraid not: a security system’s keypads are only for controlling the panel itself, they by themselves cannot be used as a panel. Security systems also often function somewhat differently than fire alarm systems.
Ohh Okay. I thought I could use that Keypad instead of Buying a $500 Panel because it those Panels on eBay are too expensive.
Nope. No idea where you might find a decent panel for an affordable price but it’s not likely to be Ebay: all I can say is that I wish you luck!
Update: I have added My Edwards Integrity Remote Strobe in the Basement for Strobe Coverage since My SPR is a Remote Speaker.