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谢谢回复,还有几点疑问,还请挨个回复,谢谢!
如下图所示:
1.这个VOD那里的60欧是我用60欧电阻连接在AB上吗?请问这个60欧是怎么来的?
2.VOD这里还有个375欧,这个代表什么意思?485的A,Bbus上用的是120欧的双绞线,没有375欧的电阻啊?
3.VOC这里,又把RL一分为2来测试VOC,那实际电路中,测试VOC不是直接测试A,B对地的电压吗?难道也要搞个RL/2?