Mitsubishi Electric PLC ALPHA Base Unit 6 inputs/4 relay outputs, DC, Type: ALPHA MAIN UNIT, Power Supply (V): 24, Current Type: DC, Program Memory: 200 BLOCKS, Program Memory Unit: EEPROM, Integrated Digital Inputs: 6, Integrated Digital Outputs: 4, Integrated Analogue Inputs: 6, Output Type: RELAY, Local I/O Points: 10, Local + Remote I/O Points: 10, Expandable: YES, RS-232: 1, Power Consumption (W): 4, Buffer Battery: NO, Protection Class: IP20,Min. Ambient Temperature (°C): -25, Max. Ambient Temperature (°C): 55, Series: ALPHA2