The ADDA range of compact annunciators incorporate the latest microprocessor technology to provide a versatile and flexible alarm system suitable for a wide range of applications.

The basic system consists of a Power Supply and one 16 way CPU alarm unit. This may be extended in modules of 16 ways up to a maximum group of 1024 ways, to form a very large synchronised alarm annunciator. Each 16 way CPU unit can be extended to 32 ways with a low cost Extension unit.

Each input provides for normally open or normally closed alarms via a base mounted dip-switch. Each unit provides for normally on (inverse) led drive e.g. For use as Mains On alarms etc. This is an internal jumper setting. All slave modules have dip-switch settings for the following control options: First on fast flash / Manual or Auto reset / Ring back / and input fast or slow response time. The system is modular expandable - up to 32 slave units. All connections are via standard 11PIN relay bases. The units are interconnected via a standard 10-way ribbon system. The master unit has pushbutton facilities for Lamp Test / Accept / Reset inputs as well as potential free relay contacts for Horn and Trip outputs.

This is a 12 or 24V DC, Relay based, Full Function Alarm Annunciator Card which is ideal for smaller applications where alarm annunciation is required, e.g. on mimics or control panels.

Each ARM 4P card drives 4 LEDS; 20 cards can be driven by one control card ARM-CON which contains all common circuits and a flasher.

It is available from the factory in Automatic or Manual reset models. It can be used in an existing 24V DC system but it should be noted that the LEDs require positive common connection. The "Test Accept" button accepts alarms and also provides lamp test. A full system requires 12 or 24VDC, an ARM Card for every 4 ways, 1 control card, a buzzer, an accept button (and also a reset button in the case of a Manual Reset model).

The System operates on a normally open contact which closes on fault. On receipt of a closing contact the hooter sounds and the appropriate LED flashes. On acceptance, the hooter silences and the LED goes steady.

In the 'Auto Reset' model the LED goes out when the fault clears.
In the 'Manual Reset' model the LED stays on until the reset button is pressed.
In either case, fleeting alarms are latched until accepted.

Subsequent alarms are recognized, i.e. if there are alarms on the system, a new alarm will initiate a flashing LED and sound the hooter, without affecting existing alarms.

If a panel mount self contained alarm annunciator is required see "ADDA 8", and for a large system see our "MULTI 16 PLUS"' which can drive 1008 LEDs and incorporates advanced features.

Also see our "MF 1", a motor flasher card which is ideal for motors that require steady run indication which flashes on trip and initiates a hooter.

This is an 8 way Alarm Card with Lamp Test and subsequent Buzzer output.  It has been designed primarily as a driver for remote active repeat Mimics for fire Panels and other similar alarm systems where there is a Latched output.

It provides an economical method of indicating alarms on a mosaic panel or alarm window display. LED’s do not flash and fleeting alarms are not latched (when the signal goes, the LED goes out).r />
It is much better than a simple diode steered alarm card in that it also indicates subsequent alarms by restarting the buzzer every time a new alarm arrives, even if existing alarms are still present.

It incorporates lamp test, LED ballast resistors and a horn driver. It is available in 12V and 24V DC versions.

Process controlled applications where operators need to be made aware of new events but a full alarm annunciator is not required. This unit combined with a standard Lamp test card will provide a low cost solution for Motor run/ Trip indication. IE: Use the Standard Lamp test card for the steady state RUN indications and the SASB Alarm card for the Overload Latched Trip circuits.

See also door monitoring modules, AEM4 modules.