Sirene Alarmcom/Siemens SA6

[Ross57]

Hello,
finally I have found it!!
Actually it is a GESCO SECURVOX 833 but it is exactly the same of ALARMCOM (SIEMENS) SA 6.
If it can help someone, here below is the link to the instruction manual in pdf (sorry, it's in italian english but still helpful for anyone who needs to know exactly its pinout and how to connect to the head unit).
Thank you very much.

https://www.gesco.it/easyUp/file/manuali...CURVOX.pdf