Yes. The 49-2251A uses X10 line signals and
I believe was made by X10 for R.S. The
powerhorn will work with an X10 DS7000
Security System. It requires a set of All
Lights ON; All Units OFF commands to sound.
So a simple X10 ON signal to it will not
trigger it. It will also respond to a X10 ON
OFF code cycle on the House/Unit code the
wheels are set to.