干式觸點(diǎn)的一端連接到端子B3b上,由電源模塊提供正48V直流電壓,干式觸點(diǎn)的另-端連接到所需的觸點(diǎn)輸入端子。每個(gè)觸點(diǎn)輸入組有一個(gè)公共(負(fù))端子,該公共端子必須連接到電源模塊的直流負(fù)端子(B3a)上。當(dāng)-個(gè)干式觸點(diǎn)閉合時(shí)
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