The MCS-MAGNUM-12 is a master control board that can be paired with a keypad and display. Complementing the Magnum micro controller are the MCS-IO-BASE/-EXT, MCS-RO-BASE/-EXT, MCS-SI-BASE/-EXT, and MCS-MODBUS-IO-12 expansion boards. This allows for system expansion to a maximum of 112 inputs and 80 outputs. Communication with these units occurs at 38,400 baud over the MCS-I/O port, which is dedicated to this purpose. A RS-485 port is also provided for communication with Building Management Systems (BMS). Other features include the integration of BACnet IP, Modbus IP and Modbus RTU, by including a MCS-BMS-Gateway, with the Magnum.