Dear Sir
i have an old project that has a Landis & GYR Controllers (PRV1.32, PRV1.64 & PRV1.128).

our client wants some modification on the system, so i am searching for any details about these controllers (Datasheets, manuals...etc)

can you please provide me with these?

thanks in advance.

 

Landis & Gyr has been taken over by Siemens.

Check this link for info:
http://www.siemens.nl/sbt/doc/klt/N8102en.pdf