Fault Annunciator System AD 5999 The AD 5999 control unit and the extension unit AD 5993 form an expandable fault annunciator system for displaying operating and fault messages. Features . For acquisition of operation- and fault signals . Expandable from 3 up to 203 operation- and fault signal inputs . Width 45 mm Fault annunciator AD 5999: . 3 inputs for operation- and fault signals . Pushbutton connection for acknowledgement of horn and lamp test . 1 relay for common alarm and 1 for horn Extension unit AD 5993: . 4 operation- and fault signal inputs Technical specifications Width: 45mm Enclosure design: Switch cabinet Alarm inputs: 3 Alarm inputs extendable up to: 203 Operating principle: Energized on trip Optional buzzer: Yes Type: AD 5999 Manufacturer: E. Dold & Söhne GmbH & Co. KG Type: AD5999 AC50/60HZ 24V Art. No.: 0032369