Ics triplex TC-003-01
中央处理接地原则:
●接地线和主电路应以星型连接
●柜内所有AC31组件应连接到同一地
●如果远程单元装在柜外,它们应连接到最近的接地点40和50系列中央处理单元的DIN标准导轨安装系统配有接地金属片。如果中央处理单元是用螺钉方式直接固定在金属盘面上,位于中央处理单元(参见正视图)左侧上部的螺钉通过接地金属片确保电气连接到接地点。
接地确保防止电磁干扰。
安全的接地线(在端子块上)应连接到柜内的底盘上(PE- 端子)。
几个电控柜相连的接地原则如电控柜靠近接地点,可用一个导线截面不小于16mm2的地线把它们连接一起。
中央处理单元和远程扩展模块可连接到总线的任何一点:
●总线1到总线1
●总线2到总线2
在端子块1的3号端子的屏蔽和接地接到主站(电缆<1m)如果在控制柜附近有干扰设备,建议在总线屏蔽层连接示意图使用1 nF class Y的电容直接在控制柜的电缆入口处接地。由于CS 31是带光电隔离的,它可参考放在不同供电电压的设备之间使用
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