A good many years ago I installed a Bosch Abacus Evolution Alarm panel and 3 zone expanders. Not long afterwards the series was discontinued. I was told subsequently, that actually this a Castle Caretech panel which had been re-badged by Bosch. I bought some Castle Caretech  prox tags and I was pleased to find that they worked. I want replace my panel now, possibly with the Castle Caretech Euro 46.  Is there any chance that my existing zone expanders will be compatible? 

can you post a pic of the pcb?

I'd guess its a euro 44+ with the zem which plugged onto a PSU (if needed)

Thanks for the replies. I've uploaded photos of both the Panel and Expander pcb's.

On the 4 way connector, A and B are the power supply. C and D are the RS485.

Let me ask the question a little differently.....

 

Assuming that the supply voltage is the same, would it be safe to try my existing zone expanders with a new panel. I'm an IT manager. So I know about networking. I think it will either work or it won't. In my experience an incompatible communication protocol isn't going to kill anything.

looks like a euro 28 pcb id assume they would work. 

you also have an msx card and a 232 card fitted?

A memory expansion card and a telephone dialer card. I think that's what you just said.

Actually I think the dialler is on the main board and the slot-in card is RS232, but I never got it to work.

23 minutes ago, HoofHearted said:

Actually I think the dialler is on the main board and the slot-in card is RS232, but I never got it to work.

 

top card is modem, lower card is looks like msx with 232 connections or just 232 card

 

however its 15yr or so since I fitted one...