本文对本质安全现场总线设备的供电方式做了详细比较,包括隔离供电、集中式供电和总线供电,讨论和分析了常用总线供电仪表的能量获取方式和信号传输原理,这为特定场所的现场总线系统供电方案的选择提供了有益的参考。关键词:现场总线;本质安全;总线供电Power supply of the safe Field Bus equipmentAbstract: This paper has made the detailed comparison to the power supplymethod of intrinsically safe fieldbus equipment, including isolationsupply power, concentration supply power and bus-powered. Have analysedthe energy supplying and signal transmission principle of fieldbus, itoffered beneficial reference for choising the power supply method inspecific fieldbus system.Key Words: fieldbus; intrinsically safe; bus-powered
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