The MCI is used to translate RS-232 protocol commands from units such as AMX and Crestron to RS-485 used by Audioaccess systems. The MCI allows for 2 way data communications with these master control systems. The MCI is not needed for control systems compatible with RS-485.
Bi-directional RS-485 to RS-232 translator
Red LED for power, green LED for communication
Four wire phoenix connection for RS-485; 9 pin connection for RS-232