Scantronic 9651 Bell Connections Query

[kelvin]

I'm trying to connect a Scantronic 9651 control panel to a simple 2 wire 12 volt bell and a 2 wire anti tamper microswitch on a bell box. The installation manual gives all sorts of sophisticated connections but doesn't cover this! Can anyone explain how to connect please? Many thanks. - Kelvin

[kelvin]

not knowing the panel, if you could let me know what your bellbox connections are called on that panel i will.

Basically you want to wire your +ve to 12v, and the bell -ve to bell trigger/bell -

1 side of your tamper to -ve and the other side to tamper return

Thanks for the prompt response!

Do you mean:

+ve on the bell to 12v aux on the panel

-ve on the bell to OP1

and the 2 wire tamper to OP1 and TR ?

Would that make sense to you?

Kelvin

[golfball]

I cant rmember if the op1 on the scanny is neg removed or neg applied or if you can change it but as james says put the pos into the pos (12v ) on the aux supply put the neg into op1, link the TR to 0v on the aux supp if you dont the panel will flag a bell tamper ,put your two tamper wires into the global tamper or into a zone (dont forget the resistors if you are using FSL its a 2k2) and tell panel its a 24Hr zone or stick one end of your tamper into TR and the other into the aux 0v

[Guest]

Bell +ve to Aux +

Bell -ve to Aux -

Bell Trig to output 1

Strobe Trig to output 2

Tamper rtn to Tr-

End of.

Its in the manual.

[kelvin]

I cant rmember if the op1 on the scanny is neg removed or neg applied or if you can change it but as james says put the pos into the pos (12v ) on the aux supply put the neg into op1, link the TR to 0v on the aux supp if you dont the panel will flag a bell tamper ,put your two tamper wires into the global tamper or into a zone (dont forget the resistors if you are using FSL its a 2k2) and tell panel its a 24Hr zone or stick one end of your tamper into TR and the other into the aux 0v

Not sure, but you can programme virtually anything on the Scantronic so I'll have a play. The instruction book shows one connection option as OP1 = TRG and 12v AUX = HOLD+ so the OP1 is probably negative. Many thanks.

[kelvin]

If it is a bell rather than a siren I would advise caution. Some bells have a larger current drain than modern panels can cope with.... and an old, defective bell can be worse.

Paul

It's a Friedland 6inch 12v 180mA master bell. The panel AUX 12v allows a total of 500mA and the OP1 output gives negative applied - so hopefully that all sounds ok. I've got 2 Scantronic 420 PIRs coming off the aux too, but I wouldn't think they draw much. Thanks all for your advice! Greatly appreciated.

Kelvin