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本文介绍了RS-485智能集线器的设计及其在低压集中抄表系统中的应用,这种集线器具有各支路线路分离、零延时自动收发转换、定时循环检测电能表、故障支路自动隔离、抑制380V交流电错误接线、故障恢复后自动接入以及防雷击浪涌和群脉冲的保护功能,有效弥补了RS-485总线在实际应用中的不足。
This paper introduces the design of RS-485 intelligent hub and its application in low-voltage centralized meter reading system. This kind of hub has the following features: separate branch lines, zero delay automatic transmission and reception, timed loop detection watt-hour meter, fault branch automatic isolation , Inhibit 380V AC wrong wiring, automatic recovery after fault recovery and lightning surge protection and pulse protection, effectively make up for the lack of RS-485 bus in practical applications.