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6FC5357-0BA10-0AE0(货源完整)
6FC5357-0BA10-0AE0(货源完整)
西门子PLCS7-300系列PLC安装及注意事项
西门子$7300安装注意事项一)辅助电源功率较小,只能带动小功率的设备(光电传感器等)
西门子$7-300安装注意事项二)一般PLC均有一定数量的占有点数(即空地址接线端子)不要将线接上
西门子S7300安装注意事项三)PLC存在O响应延迟问题,尤其在快速响应设备中应加以注意
西门子S7-300安装注意事项四)输出有继电器型,晶体管型(高速输出时宣选用)输出可直接带轻负载(LED指示灯等)
西门子S7-300安装注意事项五)输入断开的时间要大于PLC扫描时间
西门子$7300安装注意事项六PLC输出电路中没有保护,因此应在外部电路中审联使用烙断器等保护裝置,防止负载短踣造成
损坏PLC
西门子S7-300安装注意事项七不要将交流电源线接到输入端子上,以免烧坏PLC
西门子S7-300安装注意事项八接地端子应独立接地,不与其它设备接地端串联,接地线裁面不小于2mm2
西门子S7300安装注意事项九输入、输出信号线尽量分开走线,不要与动力线在同一管路内或捆扎在一起,以免出现干扰信
号,产生误动作;信号传输线釆用屏蔽线,并且将屏蔽线接地;为保证信号可靠,输入、输出线一般控制在20米以内扩展电缆易
受噪声电干扰,应远离动力线、高压设备等
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