8 digital outputs with RS-232/485 interface. Features:8-channel photoelectric isolation ON/OFF outputWorking power supply: 9-40VDCIsolation voltage: 2,500V rmsMaximum ON/OFF voltage 110V/DC 0.3A, 30V/DC 1A for DC inputElectric interface: double 10-bit wiring terminalWorking environment: -25℃ to 70℃, relative humidity: 5% to 95%Supporting DOS/WIN95/WIN98/WIN2000/NT/XP and Linux..