Triggering the Universal Alarm from a 240V source.

Solution #1.
A customer had a time-clock that switched a 240V AC socket "on" for a short duration whenever pre-defined times occurred. He wanted to trigger a Universal Alarm to produce an audible output whenever these events happened. The customer was also using one of the exchange line inputs on the Universal Alarm for incoming exchange calls.

A T2430 41B AC Adaptor was modified so that the output lead terminated on the centre two pins of a 6P modular socket (You'll need to order this specially modified adaptor from us on a special order). The adaptor was plugged into the time-clock's 240V AC output socket and the adaptor's modular plug inserted into the "unused" exchange line socket.

Whenever the time-clock's 240V AC socket became "live" the adaptor supplied an AC voltage to the Universal Alarm to trigger an audible output.

Note that any AC adaptor with an output voltage from 20-100V would be suitable for this application.

Solution #2.
A customer had a UPS that switched 240V AC to a socket if the UPS output failed. He wanted this to trigger a Universal Alarm to provide strobe and audio outputs. The Universal Alarm was not being used for incoming exchange calls.

Screw terminals 3 & 10 were strapped together and normal connections were made for the horn speaker, strobe lights and power-pack. Link J1 was opened. The alarm's power-pack was plugged into the UPS 240V socket. One of the four "line 1" alarm tones was selected for the alarm tone.

When the UPS failed and the associated 240V AC socket was switched "on" the alarm powered up and produced visual and audible alarms.