Multi-protocol communication board and multi-protocol communication system based on second-order low-pass filter
A communication board and multi-protocol technology, applied in the transmission system, two-party line system station, electrical components, etc., can solve the problems of voice communication being susceptible to interference and instability, and achieve reduced construction costs, high voice quality, and reliability sexual effect
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[0038] Below in conjunction with accompanying drawing, structure and working process of the present invention will be further described.
[0039] The CAN described in this article is the abbreviation of CANBUS, and the two represent the same meaning.
[0040] like figure 1 As shown, a multi-protocol communication board includes a central processing unit, a display unit, a keyboard input unit, an audio processing unit, a communication unit, and an interface unit; wherein,
[0041] The communication unit includes Ethernet communication module, CAN bus communication module and RS-485 communication module;
[0042] The circuit diagram of the CAN bus communication module is as follows: figure 2 As shown, the communication interface is realized through a dedicated high-performance CAN transceiver chip (TJA1051). The external CAN bus power supply is completely isolated from the working power supply of the communication board, which ensures the reliability of the communication boa...
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