open-collector

基本解釋

The bus is "idle" when both lines are high (open-collector).
縂線空閑時(shí)，兩條線都是高電平（集電極開(kāi)路）。
The digital outputs are open-collector transistor switches that you can control from the ADAM-5000 main unit.
數(shù)字量輸出是集電極開(kāi)路開(kāi)關(guān)，你可以通過(guò)ADAM-5000主單元來(lái)控制。
www.polycom-tandberg.cn
If another voltage or current source is present, you could replace S1 with an open-collector switch that sinks current only.
如果另外有個(gè)電壓或電流源存在，用僅有減小電流作用的集電極開(kāi)路開(kāi)關(guān)代替S1。