The AEM4 micro controller based alarm annunciator system was designed for use as an industrial rail mount alarm
system. This modular system comprises of 11Pin plug-in modules which wire directly to the field. The system
comprises of a master unit which consists of the user pushbutton inputs and supply inputs as well as potential free
contacts for the horn and trip functions. The slave units consist of 4way alarm modules with field inputs and display
outputs. One master unit can drive up to 32 slave units, thus expanding the alarm unit to a 128 way(maximum) alarm.