The DS100 (DS-100) is a zoned, audible-visual alarm-indicating system designed to monitor doors, windows, or any device that uses open or closed contact switches, including momentary emergency push buttons. Interruption or making of a circuit will cause the specific light indicator to latch on at the master panel and generate an alarm tone which may be silenced without cancelling the visual signal. Annunciator capacity can be expanded using AM-100/24 (24 zone) or AM-100/36  (36 zone) expansion models.

The visual signal can only be reset at the master.

The PK-2019A (PK-2019A) Annunciator Power & Control Unit provides power, control and signaling circuits, plus a normally open and a normally closed auxiliary contact. Using a PK-2019A control unit provides a full-form "C" dry contact. Screw terminals are provided for wire termination. The PK-2019A is surface mount, and is enclosed in an extruded aluminum case.

DS-100 Modules include Speaker and zero through 20 annunciator zone lights:

Model      Speaker   Lamps   Parallel Modification
DS-100       Yes            Zero      No
DS-100/4    Yes               4         No
DS-100/4P  Yes               4         Yes
DS-100/8    Yes               8         No
DS-100/8P  Yes               8         Yes
DS-100/12   Yes             12         No
DS-100/12P Yes             12         Yes
DS-100/16   Yes             16         No
DS-100/16P Yes             16         Yes
DS-100/20   Yes             20         No
DS-100/20P Yes             20         Yes
AM-100/24    No             24         No
AM-100/24P  No             24         Yes
AM-100/36    No             36         No
AM-100/36P  No             36         Yes