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Alarm Annunciator is an instrument that monitors potential free digital inputs on real time basis. Alarm Annunciator are available in various multiple channels combinations. ESD has many options in Alarm Annunciator category.

How does a Alarm Annunciator work?
Alarm Annunciator uses a micro-controller, optical digital isolators, multiplexers. Alarm Annunciator can either interface with a computer and use software to view and analyze the collected data or be used as a stand-alone device with a local interface or connect via RS485 two wire interface or wirelessly to a SCADA.
The advantage of Alarm Annunciator is that they can operate independently and various channel are available 2,4,6,8,12,16,24,32,48 inputs. Alarm Annunciator follows standard ISA sequences, it is field programmable using DIP switches. ESD make Alarm Annunciator are known for its relability, repeatablitiy, robust and proven field performance over the years.