Model 9427 is the keypad.
What's the panel? Could be a 9448.
You'll have probably done a Googole search for, and found, the user manual now but in case you didn't have a minute or two to spare:
http://www.casasecurity.co.uk/download/manuals/Scantronic-Manual-9448User.Image.Marked.pdf
erert, September 2017