Thanks for the confirmation Brian, much appreciated. The security system is the Visonic Powermax+ (
http://download.homesecuritystore.com/downloadmanual.aspx?FileName=POWERMAXPLUS_Install.pdf) and my understanding now is that I wouldn't even need now a powerline module to get flashing bulbs: I connect the powerflash to the PGM output of the alarm.
Now, I hadn't paid attention in the documentation to the PGM part, because I was stuck on the X-10 part, and thought the alarm system could only send ON or OFF commands, but I read now that "
For the PGM output, you can select disable, turn on, turn off or pulse active (turn on for predefined period, selected by PULSE TIME)", which would then mean I still don't need the powerflash module... Furthermore "
For X-10 devices, you can select the following actions: FLASH ON ALARM (you can select no flash or all light flash, to control X-10 lighting devices in alarm conditions)". In fact, I think I've my answer now (I only need a PSC04 module, or maybe even better a PSC05), unless you can chime in more. Apologies for the trouble (I'm planning this upgrade with the little documentation I have, I'm a complete noob when it comes to X-10, and don't want to purchase modules will be useless, just because I was confused or clueless).
Thanks!
BTW, about Newt's post on that alarm system (
http://forums.x10.com/index.php?topic=20406.0), the documentation mentions for the RJ11 that "IMPORTANT! OFF-THESHELF CABLES ARE UNSUITABLE HERE. PREPARE YOUR OWN “ONE TO ONE” CABLE.", but it's in the fine print of course...
. I'll add that info that thread.