信号タイプの記号の意味
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DO：REL DI：NO それぞれどういう意味ですか？
DO：REL（リレー）はリレーのデジタル出力で、つまりリレーが出力するオン・オフ信号です。 DI：NO（ノーマルオープン）は、常にオンのデジタル入力であり、つまり常にオンのスイッチ入力です。
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