Description
显然，N个显示器占用的输出点数为P=4＋N。如果PLC使用继电器输出模块，应在与CD4513相连的PLC各输出端接一下拉电阻，以避免在输出继电器的触点断开时CD4513的输入端悬空。PLC输出继电器的状态变化时，其触点可能抖动，
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