Nah, even Yale is going to bust your budget
Based on what your saying now I think your making it all up, no one in there right mind would go from wired to wireless unless you had to
Like I said , budget is busted , although some Chinese gear from.ebay might do you
Buy the 600 and get on with it where you get stuck just ask here
Although I don't know anything about the 600 lol
If your system is all wired then probably even the honeywell flex will be a better option
The wiring won't be an issue as you can work out what is what before swapping over
You also need to set bell in SCB mode
And one of these I think swb means
https://www.securitywarehouse.co.uk/catalog/intruder-alarm-c-36/wireless-ia-c-36_60/visonic-powermax-complete-powermaster-30-expander-module
And I assume the bell tamper is programmed via one of the wired zones and you can use the pgm output
You may already have this card installed so check , it's a bit tricky if you don't know what your doing
You may need to hire a "real" alarman or local alarm house basher will do it cheaper perhaps just as good
Actually you mean something else , that's not a switch below it , that something standard in many devices , it's connected to the transformer , and has a fuse on it
Forget this alarm
Perhaps a pyronix enforcer will work for you with remote keypad
What you mean your technical in nature?
Transformer provides power from the mains supply, and the switch you mean with a spring on it? Is a case tamper switch
Like I said , buy any bellbox they come with instructions simple Honeywell ag6 will work
Side note get an engineer to fit it for you, you could find manuals on Google , this is an old alarm you should upgrade it like you might upgrade your phone or computer
Any bell box will work , unless you have some kind of wireless system , I assume cable is still there
You just need to open panel if you have correct codes look at bell connections and match upto new bell
Out of curiosity have you tried increasing the gap to 5mins
And if you have a relay, as swb pointed out in another post , is back emf keeping the relay locked ?