MDI 521

Input module

The input module is used to monitor any sign of dry contact from field devices once it goes off or is triggered.
Colors

Dry contact input

There’s a dry contact input, making it possible to integrate devices with this type of output to the fire alarm system.

Alarm and supervision LED indicator

In the occurrence of a fire outbreak, the green LED light flashing on the front side indicates it’s communicating with the main panel while the red LED light lit on the front side indicates active input.