bell box wiring

[Guest sparkster]

Just aquired an unbranded bell box with no instructions.Connections as follows;

A -

D +

B SW-

T RETURN

SEPARATE STROBE UNIT WITH + AND - CONNECTION

I believe A= Bell trigger D=12V B= ? T= TAMPER RETURN

Strobe +=12V and - =Strobe trigger

WOULD APPRECIATE ANY HELP

[norman]

Hello,

A & D are Pos & Neg hold off

B is neg trigger

and T is tamper return (should be neg!)

I think

[BUSTER]

Don't know which panel it is but norman is right with his suggestions

[black knight]

ditto

[DGMarsden]

That sounds right to me!