SENSOPER MC-EX-ND8 expansion module is an advanced module can be use with CPU module. This Digital Input module have I2C interface for establish communication between CPU module. Changing DIP switch configuration the I2C address can be changed. Eight Digital Inputs are optically isolated internally for protection of the device. This module internal operation power is 5V DC / 30mA. The 40 pin board to board connectors were included for make connection between CPU module or other expansion modules.