31 minutes ago, sixwheeledbeast said:

All the SAB modules I used in the past where dipped, surprised to see one without.

 

Looks like a thin sprayed coating

 

I recal recall aritech ones filled with resin

 

Dragon ? with thin coating & ADE one with a even thiner coating

 

Google images have very few pic of bell mods

Like a thick black potting compound the ones I recall

On 21/11/2018 at 19:47, Gabs said:

The idea was just for a microswitch to go straight to to SCB of my Accenta panel, I could route it through my SAB module, but it would just be two tracks, from one terminal block to another. Could be done with standard 6 core wire, too. 

2 for the Tamper

2 for the Hold Off voltage

2 for the Siren 

I think it would be 2 for hold off and the other two for tamp return and trigger, usually an SCB module would use the bell box battery to run the bell and a SAB module uses a trigger voltage to power the bell.

Definitely a bit late to the party.... if there ever was one

 

Your SAB module is incredibly simple. It looks like it's got a very simple charging circuit in the form of a diode traced in series with a resistor used to limit the current in order to charge the nickel cadmium battery correctly. If i remember, that nicad has a 280mA capacity so youd need roughly around 10% of the capacity of the battery in current to charge it. So you'd need to calculate a resistor that can limit the current to 28mA. This will provide a trickle charge

 

That relay is simply just switching the battery to the bell when de energised, and it's N/O contacts is energising the charging circuit.

 

The tamper switch contacts are simply wired from the negative hold off to the tamper return terminal. Then the N/C side is bridging between the negative hold off and the negative of the bell. I'm assuming this is for a 24hr tamper In the form of locally sounding the bell.