Power : 220V DI : 8 DO : 8 Relay Port : Rs232 + Rs485 + ethernet Supports 2-channel duplex high-speed (200KHz) pulse input, supports 2-channel duplex high-speed (200KHz) pulse output; Adopts detachable terminal wiring, and it adds rechargeable batterise which is used to keep real-time clock; The control points, program capacity and RAM compnent count has increased greatly; Modifies command algorithm, and adds new instructions; Supports communication format of N,8,1 RTU, and baud rate 115200; Users can record and search system fault by SV817~SV832; Support Ethernet port and 5 other RS232/RS485 communication ports working simultaniously, support N:N network type.