Master microcontroller board with twelve 0-5vdc sensor inputs, four 5vdc digital inputs, ten 230vac 6.3amp relay outputs, four 0-10vdc analog outputs, keypad, 128 x 64 dot pixel STN monochrome graphics LCD with 2.8″ diagonal viewing area, real-time clock, MCS-I/O, RS-232, RS-485 and Ethernet communication ports. User selectable 115vac or 230vac operation.