Advantech ADAM-4168-AE: 8-Ch Relay Output Module Communication Interface: RS-485, Micro USB, Passive UHF RFID, 8 Form A output channels Broader Operating Temperature Range, Higher Noise Immunity: 4 kV surge protection on power inputs, 4 kV EFT, and 8 kV ESD Protection Broader Power Input Range: +10 ~ +48 VDC LED display allows to monitor the status address settings DO channels support pulse output function