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Edwards EST CMDN

LCD Remote ANNUNCIATOR

In the context of fire safety and building security, EST CMDN refers to the 

Edwards System EST Remote Alphanumeric Display Annunciator

.

This device is a critical component of legacy Edwards/EST fire alarm systems (specifically the EST2 and IRC-3 series) that provides a remote interface for system monitoring and control. 

 

Specifications & Features:

 

• Functionality: Displays system status messages (alarms, troubles, supervisories) in clear text and allows users to perform basic operations remotely.
• Models:
• CMDN: Standard alphanumeric display annunciator.
• 2-CMDN-C: A variant typically used with EST2 systems that includes control functions, often featuring a keyswitch for resetting or acknowledging events.
• Interface: Connects via an RS-485 data link to the main fire alarm control panel.
• Legacy Status: These units are largely associated with older systems like the EST3, many of which are being transitioned to newer platforms like EST4. 

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