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介绍了一种用于煤矿井下的本质安全型多路数字信号串行通讯系统。该系统主要由ＭＡＸ１４８０Ｂ串行数字通讯接口芯片和ＡＴ８９Ｃ２０５１ 单片机构成，可以实现１００Ｈｚ 以下缓变信号的远程传输；具有传输信号准确可靠、廉价实用等优点；可以替代某些矿井使用的从井下到地面中央调度室的昂贵复杂的载波信号传输系统，也可用于井下某些多路信号传输场合。
An intrinsically safe multichannel digital signal serial communication system for coal mine is introduced. The system is mainly composed of MAX1480B serial digital communication interface chip and AT89C2051 single-chip microcomputer, which can achieve long-distance transmission of slowly changing signals below 100Hz. It has the advantages of accurate, reliable and inexpensive transmission signals. It can replace some wells used from underground to the ground The expensive and complicated carrier signal transmission system of dispatching room can also be used for some multi-channel signal transmission situations in underground.