Communication protocol converter for safety monitoring system of bridge girder erection machine

The utility model discloses a communication protocol converter used for a bridge girder erection machine safety monitoring system, comprising an instrument housing and a circuit board, the instrument housing adopts a cast aluminum dustproof structure design, and the instrument housing is used for protection and installation of the circuit board. The circuit board comprises a main control circuit, a power supply circuit, an Ethernet communication circuit, a CAN communication circuit and an indicating lamp circuit, and the power supply circuit is used for supplying electric energy to the main control circuit, the Ethernet communication circuit, the CAN communication circuit and the indicating lamp circuit. According to the communication protocol converter used for the bridge girder erection machine safety monitoring system, a converter based on free protocol CAN communication to standard Modbus TCP communication is formed, compatibility of data communication in an industrial control system is provided, a commun