Just replaced the control unit from an ancient alarm installation, keeping the existing wiring because it would be a b***er to replace. The external bell is wired up rather eccentrically, with a four-core cable of which red/black drives the siren and yellow/blue provides tamper indication via a simple microswitch. Just to make matters worse, there's a panic button on the landing which is simply wired in series with the tamper switch on the bell box; in other words panic is signalled to the tamper terminals on the control unit.
That would be all right, but the external sounder doesn't sound. Might be the box, might be the cable and I'm hoping it's the former (for reasons given above). So I'm going to try a new bell box. But there are only four cores in the cable so I can't see how I'd control a strobe.
Questions: (1) can anyone point me to a bell box without a strobe? I've searched for ages without finding one. Or (2) can someone suggest how I might use four cores and a "normal" bellbox, with a strobe in it. Householder doesn't mind if the strobe is disabled, since there's none there just now.
That would be all right, but the external sounder doesn't sound. Might be the box, might be the cable and I'm hoping it's the former (for reasons given above). So I'm going to try a new bell box. But there are only four cores in the cable so I can't see how I'd control a strobe.
Questions: (1) can anyone point me to a bell box without a strobe? I've searched for ages without finding one. Or (2) can someone suggest how I might use four cores and a "normal" bellbox, with a strobe in it. Householder doesn't mind if the strobe is disabled, since there's none there just now.