YAN Xian-yong, SONG Jian-cheng. Study of Communication Bus Based on RS485 Interface Used in Coal Mine Underground[J]. Journal of Mine Automation, 2007, 33(3): 77-79.
Citation: YAN Xian-yong, SONG Jian-cheng. Study of Communication Bus Based on RS485 Interface Used in Coal Mine Underground[J]. Journal of Mine Automation, 2007, 33(3): 77-79.
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Study of Communication Bus Based on RS485 Interface Used in Coal Mine Underground

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  • The various factors which influence on the communication quality of RS485 bus had been analyzed in details,and an intrinsically safe RS485 interface circuit was designed according to conditions in coal mine underground in this paper. The exactness,rationality and practicability of the communication bus were verified by the communication between single-chip microcomputer AT89C52 and PLC.
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