USR N520 H7 Version Dual Port Serial RS232 RS485 to Ethernet Converter Gateway TCP IP Industrial with Modbus RTU function USR-N520 is 2-port serial to Ethernet converter. It adopts Cortex-M7 solution,which has a main frequency up to 400MHz, powerful performance, fast transmission speed, and high reliability. Equipped with a deeply optimized TCP/IP stack, built in hardware and software watchdog and a variety of keepalive mechanisms,USR-N520 keeps online all the time. It supports TCP Client, TCP Server, UDP Client, UDP Server and HTTPD Client working modes, achieves data transparent transmission via simple configuration.   Item Parameter Description Hardware Parameters Input Voltage DC 5.0~36.0V Input Current 67mA @12V Dimensions 150*98.8*30 mm (L*W*H, including terminals and mounting ears) Installation Panel mounting Ground Screw 1 Operating Temperature -40~85℃ Storage Temperature -40~105℃ Operating Humidity 5%～95% RH(non-condensing) Storage Humidity 5%～95% RH(non-condensing) Certifications CE/FCC/ROSH Interface Parameters Ethernet Port Spec. RJ45, 10/100Mbps, auto MDI/MDIX Ethernet Port No. 1 Serial signals RS232: RXD, TXD, GND, RTS, CTS RS485:A+，B-,GND Serial Port No. 2 Serial Baud Rate 600-230.4K(bps) Data Bit 7, 8 Parity None, Even, Odd Flow Control None, RTS/CTS (RS-232 only), XON/XOFF RS-485 Pull-up and Pull-down Resistor 2.2KΩ Hardware Protection ESD-IEC61000-4-2 Level 4 Air±15KV, contact±8KV Surge-IEC61000-4-5 level 3 ±2KV EFT-IEC61000-4-4 Level 3 ±2KV Software Parameters Network Protocol IP/TCP/UDP/ARP/ICMP/IPV4/DHCP/DNS IP Mode Static IP, DHCP Modbus Gateway Support Websocket Support HTTP Client Support UDP Broadcast Support User Configuring Setup utility, webpage, AT commands Serial Packets Cache Dynamic packet cache. For example: When the packet length is 10 byte, the serial port can cache 450 packets(4.5KB). When the packet length is 1460 bytes, the serial port can cache 10 packets(14.6KB). Ethernet Packets Cache 48Kbyte