Pyrotronics CPV-90?

I think I might’ve just found some information on the supposedly CPV-90 at long last. Was looking at some fire alarm videos and stumbled across this system 3 with voice evac and a brown/tan cabinet sitting next to it which is what I believe to be a CPV-90. here is that video. https://youtu.be/PFuMGnIeOJ8

Also looking on Google maps I found an old hotel in Chicago that used to have an XL-3 and it looks like I’ve found yet another but it looks it the controls might’ve been replaced? The controls look like something of an MXL.



Here’s what looks to be the original controls although this image is very blurry

Also I’ve recently found an eBay listing for a “Pyrotronics DMU-1” And this DMU-1 is a digital message unit and looking at the back there’s a rotary dial that is labeled “Message select” and it has 4 different options. Perhaps if this was the CPV-90 it had a choice for 4 different messages?


Here’s a link to that DMU-1 Siemens DMU-1 Fire Alarm Digital Message Unit | eBay

Also to anyone who stumbles upon this months or years later, feel free to revive this post as I’d love to get more information on this panel.

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Another video that may be of such a system:

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This is interesting. Perhaps it also was a CPV-90 as well. If only we knew exactly where this hotel was at.

It’s in Philadelphia, according to a comment reply from the uploader. (also, the message is one of the messages used in all high-rises in Philadelphia)
The video is almost a decade old, so there’s a good chance that the hotel’s system has since been upgraded.

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Ohh I see. That is pretty unfortunate if it did get replaced.


I barely realized that I might’ve found a CPV-90 in Los Angeles at this place The Reef. Seen this system go off once due to some kids pulling it back in May 2018, and it only does slow whoop. It also appears that the building doesn’t use addressable smokes as well, which might prove my point further (I could be wrong). Also the image was from streetview.

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I also found this video, the slow whoop sounding funky

This video seems to replicate the same odd whoop tone shown:

it almost sounds like a siren tone that was cut to sound like a whoop tone, as you can hear the tone start to go down slightly.

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I’m pretty sure I found it.


It’s at a Hilton at Penn’s Landing (correct me if I’m wrong).

The smoke detectors are the same as the one seen in the vid. If what I’m saying is true, the system might’ve been replaced when Hilton took over, as this used to be a former Hyatt.

This is the MXL “Wail” tone. The panel could produce a number of tones. Here’s a full list:

Bell tone
900hz
Temporal code 3
Slow Whoop
Chime
Wail

Bell tone and 900hz could be continuous or pulsed at 30, 120 and 300BPM

The DMC-1 Card itself could also produce roughly 300 phrases.

Also geez those amps need help lol

do you have any videos of the other MXL tones? I’ve only heard whoop, and code 3

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Here is the chime:

900hz you can hear be used as an attention tone before the message plays :

To this day, The bell tone remains a mystery.

I found some documentation on these:

I’ve also learned that the EEPROMS are encrypted to prevent data extraction.
https://www.youtube.com/watch?v=6GbwIlSIze0&lc=UgxxcAKuz1fWwnc1WzJ4AaABAg

https://g.co/gemini/share/cb30d1a5917f
https://g.co/gemini/share/6fe1e58eeee7