Audio Source Unit with mounting Chassis, space for 4 local rail modules, Microphone and Paging Controls
LED & Switch Module, 4 groups of 3 switches and 4 leds, LED colors, Green, Red, Yellow and White
Initiating Device Circuit Module. Mounts to local rail and takes one LRM space. Supports connection of 8 traditional Class B input circuits. Up to 4 input circuits can convert to Class B NACs. Supports one User interface module.
LED Display/Control Module – 12 Switches, 1 Green, 1 Yellow LED per switch