The NPS5151 is a compact RS232/422/485 device server and IoT gateway specifically designed for industrial environments. It integrates multiple functions, including serial device server, Modbus gateway, MQTT gateway, RS485-to-JSON gateway, and virtual COM port device tool. The device features one RS232 DB9, one RS422/485 terminal connector and one RJ45 Ethernet port, offering reliable connectivity. Its compact design supports desktop and Din-rail installation, ensuring ease of deployment, while the terminal power supply allows for a wide power voltage input range of 10~30VDC. The NPS5151 presents a cost-effective and space-efficient solution compared to standard products.