ECAN-401S is a small intelligent protocol conversion product independently developed by Chengdu Ebyte Electronic Technology Co., Ltd. The product uses 8V, 28V wide voltage power supply, integrates 1 CAN-BUS interface, 1 RS485 interface, 1 RS232 interface and 1 RS422 interface, which can realize two-way conversion between CAN and RS485/RS232/RS422 different protocol data. The product supports serial AT command configuration and host computer configuration device parameters and working modes, and supports five data conversion modes including transparent conversion, transparent conversion with logo, protocol conversion, Modbus RTU conversion, and user-defined (user). At the same time, ECAN-401S intelligent protocol converter has the characteristics of small size, easy installation. It has a very high cost performance in the development of CAN-BUS products and data analysis applications. It is an engineering application and project debugging. And reliable assistants for product development.