From Friday, April 19th (11:00 PM CDT) through Saturday, April 20th (2:00 PM CDT), 2024, ni.com will undergo system upgrades that may result in temporary service interruption.
We appreciate your patience as we improve our online experience.
RS-232 和 RS-485总线的信号电平是多少？
硬件: Serial>>RS-485
|
||||||||||||||||||||||||||||||||||||||||||||||||||
问题: RS-232 和 RS-485总线的信号电平是多少？
解答: RS-232 总线使用大约 -12 volts 作为高逻辑, +10 volts 作为低逻辑.
RS-485是差分的总线. 它在满载时大约 +3 volts 电压差, 当空载时大约+5 volts电压差 (无偏置电阻或者设备). TX+ 线是大约 +3 volts ， TX- 是 +1 volts 作为高逻辑. 信号反向就是低逻辑, TX+ 在 +1 volts 并且 TX- 在 +3 volts.
相关链接:
附件:
|
||||||||||||||||||||||||||||||||||||||||||||||||||
报告日期: 07/11/2000
最近更新: 01/05/2008
文档编号: 1ZAA1CEC