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JDCS分布式系统中每一个节点的重发器,通过两对用普通的胶皮线绞合成的双绞线对,相互连接成一个封闭的环。每个重发器则通过双绞线对供电。系统的供电示意图如图1所示。图中只画出两类节点,一类是监控站,一类是普通的工作或服务站。 整个系统的供电电源分三个种类,一种称为主电源,它设置在监控站内,一方面是提供监控站工作所必需的电源,另一方面又输出一个稳定直流五十伏电压加到双绞线对上,为各
The repeater for each node in the JDCS distributed system is connected to form a closed loop with two pairs of twisted pairs twisted together with a common rubber cord. Each repeater is powered by a twisted pair. System power supply diagram shown in Figure 1. Only two types of nodes are shown in the figure, one is a monitoring station and the other is a normal work or service station. The system power supply divided into three categories, one is called the main power supply, which is set in the monitoring station, on the one hand is to provide monitoring station work required power supply, on the other hand it outputs a stable DC 50 volts plus double Stranded pair, for each