The AD2096A Alarm Interface Unit converts 64 hardwire alarm inputs to AD alarm contact numbers for use by American Dynamics Matrix Switcher/Controller systems. The matrix switcher/controller systems can be programmed to automatically switch video inputs to video outputs, display presets, and activate auxiliary outputs in response to activated alarm inputs. A single Form C relay and LED indicate when any of the 64 alarm contacts are activated. DIP switches are used to select alarm input groups (in blocks of 64), to set acceptance of normally-open or normally-closed alarms (in groups of eight), and to set the baud rate of the RS-232 link. Multiple units can be cascaded on a single RS-232 system port. The universal mount enables the unit to be mounted to the front or rear of equipment racks, or flat on a wall or horizontal surface. AD2096A Alarm Interface Unit Input of 64 hard-wired alarms Cascade multiple units on a single RS-232 link Enables the system to automatically respond to external inputs Diagnostic LEDs Alarm presence indication Provides single relay output Universal wall, surface, or rack mount