采用自检回绕思想，给出各转接电路板详细设计原理，并以离散量输入转接板设计为例给出了电路设计原理图。
Finally, the detailed principle design for each switching board was given, and the circuit schematic drawing of discrete input switching board was presented.
采用自检回绕思想，给出各转接电路板详细设计原理，并以离散量输入转接板设计为例给出了电路设计原理图。
Finally, the detailed principle design for each switching board was given, and the circuit schematic drawing of discrete input switching board was presented.
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