RS485通讯的工作原理是什么？ - 知乎
RS485通讯接口分为两种，一种是两线制，另一种是四线制。 两线制的是半双工通讯方式，四线制是全双工通讯方式。 RS485通讯接口，抗干扰能力强，抗噪声干扰性好。 在工业控制 …
Compatibility between RS232 and RS485 | Forum for Electronics
Sep 23, 2017 · I red that RS485 works with differential voltages and can tolerate lower voltages than RS232. My question is: Is the label RS485 wrong (since it worked as RS232) or the two …
Confusion with RS485 data Tx+, Tx-, Rx+, Rx-, A, B, Y, Z
May 16, 2008 · The RS485 is a bidirectional communication so there is no meaning to use Tx+ or Tx- alone & the best notation is A, B. But unfortunately here i have to use different …
Compatibilities between RS-485 and RS-422 - Forum for Electronics
Mar 22, 2002 · half duplex transmission protocol for rs485 Is it possible to use a RS-485 interface with a device which uses RS-422? In other words, is RS-485 fully compatible with RS-422? …
如何理解串口，UART, RS232, RS485？ - 知乎
因为rs485是差分信号，干扰可以互相抵消，相比较而言，rs485波形不容易变形，抗干扰性能更好。 但是为什么我们在控制器上总能看到rs232身影？
RJ45接口如何使用RS485通讯？ - 知乎
4、RS485转PROFINET（PROFINET转RS485）总线桥网桥可用于一对多集成RS485自由协议设备，满足各种串口设备仪表连接PROFINET网络，实现PROFINET控制器监控串口自由协议设 …
rs485通讯，modbus协议，数据帧modbus格式，rs485格式比 …
rs485通讯，modbus协议，数据帧modbus格式，rs485格式比如8e1，其中起什么作用？ 使用rs485通讯，modbus 协议，数据帧遵循modbus格式，那rs485的通讯格式比如8e1，在其中起 …
What are the differences between I2C and RS485
Mar 30, 2010 · Re: I2C vs RS485 I2C is a protocol and a physical layer, so you just need it, and there is no need for lever conversion. RS-485 is just a physical layer so you have to create …
RS232 与 RS485 的区别是什么？ - 知乎
RS232和RS485的区别主要就在第二篇文档里。 我顺便把此系列的文档都链接了吧： 原来，两者的最主要区别就是RS232是全双工工作制而RS485是半双工工作制。 此外RS485的通信距离 …
RS232、RS485 和 CAN 有哪些优点与不足？ - 知乎
RS485：RS485接口在总线上允许连接多达128个收发器，具有多站通讯能力，用户可以方便地建立设备网络。 通过单一的RS485接口，可以实现多个设备之间的通信。 五、RS232与RS485 …