Name:IOT RTU Module Modbus TCP Ethernet Remote IO Module 8DI+8DO Digital Input:8 Digital Output:8 Digital sampling frequency:500Hz Serial Port:1 RS 485 Protocol:MODBUS- RTU , Modbus-ASCII I O Mode:DI or Event Counter Sensor Type:Wet (NPN or PNP), Dry Ethernet:10 100 Mbps RJ45 ports Power supply:12-36V