矿用产品LonWorks总线接口保护技术

摘要

For the problem of frequent damage in application of LonWorks bus interface of mine-used products, main causes were analyzed including unisolating sending and receiving signals, electrical surge and long-distance transmission. Three protection circuits were gave which are composed of gas discharge tube, polymeric positive temperature coefficent, transient voltage suppressor and electro-static discharge protector. The test result showed that the three circuits can achieve corresponding standards about anti-interference testing of electrical surge and have good effect in use.%针对矿用产品LonWorks总线接口在实际应用中容易损坏的问题,分析了导致损毁的主要原因是收发信号不隔离、浪涌脉冲和长距离传输等因素,给出了3种由陶瓷气体放电管、自恢复保险丝、瞬态抑制二极管、静电放电保护器件组成的LonWorks总线接口保护电路.测试结果表明,该3种保护电路均满足有关标准的浪涌抗扰度测试要求,应用效果良好.