User guide

AN24 & AN28 Annunciators Instruction Manual
2
INTRODUCTION
The Series AN24/AN28 is a multipurpose panel mounted alarm
annunciator. It has 8 field selectable alarm types, including all common
ISA sequences. The alarm channels accept normally open, normally
closed, NPN open collector transistor, and logic level inputs. Three front
panel pushbuttons are used during alarm operation to silence the horn,
acknowledge the first out alarm, and reset cleared channels as required
by the sequences.
The Series AN24/AN28 has two SPDT relays that can be used for
additional external alarm indication, additional audible devices, or for
process control.
The isolated 24 VDC power supply available on 85-265 VAC models
can be used to power additional devices and external indicators.
Disclaimer
The information contained in this document is subject to change without
notice. Dwyer Instruments makes no representations or warranties with
respect to the contents hereof, and specifically disclaims any implied
warranties of merchantability or fitness for a particular purpose.
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