RS-485用三根线和仪器相连
硬件: Serial>>RS-485
问题: 我的仪器是和RS-485兼容的,但是只有三根线:发送,接收和地。当配置NI串口卡的时候,只允许设置成两线或是四线的收发方式。那么,我应该把它设置为哪种方式呢?仪器应该怎么样连接呢?
解答: 对于485仪器来说,只有三根线是非常常见的,特别是那些同时兼容RS-232和RS-485的仪器。你可以将收发模式设置成
四线模式并作下列的连接:
RS-485 串口 | 仪器 |
Transmit + | Transmit |
Transmit- | Gnd |
Receive+ | Receive |
Receive- | Gnd |
相关链接: 产品手册: Serial Hardware and Software for Windows User Manual
附件:
报告日期: 11/05/2002
最近更新: 04/16/2004
文档编号: 2R4H9OWH
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