A-21x WIFI I/O module, support protocol:

• Modbus RTU/ASCII, Modbus TCP/IP; Modbus over TCP/IP; Modbus over UDP/IP
• WIFI Remote Modules ADIO
• 4AI (0~10V/2~10V + PT - 100/1000)
• 2AO (0~10V/2~10V),
• 2DI, 2DO (Source Output)
• WIFI*1, RS-485*1, USB*1