USR-TCP232-419 is DTR/DSR Serial Ethernet converter, ethernet to serial converter with modbus RTU function Character for DTR/DSR Serial Ethernet Converter M4 Series Feature Industrial Solution TI Cortex M4 Solution, work temp at -40~85C Work Mode TCP Server/ TCP client/ UDP Server/UDP Client/ HTTPD Client Advanced Character -Modify MAC -Network Printing -Web Server: Web socket, Web to Serial Flow Control Software: XON/XOFF Serial Signal RS232: TX/RX, CTS/RTS, DTR/DSR RS485:A/B/G Serial Port RS232/RS485 Modbus Gateway Modbus TCP to Modbus RTU in bi-directional Modbus Polling Power Supply DC/Terminal type 5V~36V Protect Surge Protection, ESD 2KV, for more harsh industrial environment Built-in web page Customized web page is acceptable Certification CE/FCC/RoHs/WEEE Industrial data transmission, industrial automationDTR/DSR Serial Ethernet Converter Application Field security and protection monitoring, public security Smart home, power control, environmental monitoring, intelligent agriculture Door check on work attendance system, POS system, rice selling system Building automation system, power monitoring, self-service banking system, telecom machine room monitoring All USR products will be tested by R&D first, then production test again.(ESD Test,Surge/EFT Test, High/Low Temperature Test, EMC and LVD environment reliability test, etc.)