4-channel Expansion Master Station with 4A Power Supply

Station adds 4 powered intercom channels to an MS-2002 or MS-4002 master station and it provides talk, listen and call buttons for the added channels. It provides automatic current limiting during short circuits or overloads. Front panel fault indicator provided for each channel. Each expansion channel has its own program input. Connect any line-level audio source for monitoring in the master stations speaker or headset and for routing to the expansion channel if desired.