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。在工业控制上，rs485 …
Compatibilities between RS-485 and RS-422 - Forum for Electronics
Mar 22, 2002 · RS485 is two way: multiple transceivers on the bus. Both busses use two-wire differential signals with identical voltage levels. From a hardware point of view it is possible to …
Compatibility between RS232 and RS485 | Forum for Electronics
Sep 23, 2017 · It sounds unlikely that the RS485 scale interface works with a RS232-to-USB cable, unless the scale supports both interface standards in parallel on different pins or has a …
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 …
RS485 Source Code for PIC - Forum for Electronics
Oct 27, 2003 · pic rs485 Hi all. I need RS 485 rx and tx comminication commands for Pic Basic Pro. (use pic 16f84) Thanks. R.Can RAKAN Teknik Danýþman +90.555.311.55.71
Creating a TCP/IP network over RS-485 bus - Forum for Electronics
Jul 31, 2004 · The amplifications are done using opamps). Correct me if I'm wrong, RS232 protocol is pretty much the same as RS485. Basically, I would take a look at the TCIP lean …
RS485 - Effect of termination resistor?? - Forum for Electronics
Feb 13, 2009 · Reading various posts in this topic i found that RS485 will work without terminating resistor, But if I add a terminating resistor in a single slave network, it stopped working. What …
How to interface rs485 with pic16f877a? | Forum for Electronics
Feb 4, 2005 · rs485 with pic dear all m making a project using pic microcontroller,in which i need rs485 communication link.can anyone please help me out with this rs485 thing. m new to this. …
Implementation 12 RS232/Rs485/RS422 Ports in FPGA
Mar 14, 2013 · You dont want to worry about the voltage level of RS232 & RS485/RS422 when you are using Transceiver for same. You just need to control it. In RS485 mode the controlling …
What are the differences between I2C and RS485 - Forum for …
Mar 30, 2010 · Re: I2C vs RS485 Hi, I2C (IIC) stands for Inter-Integrated Circuit, so itss designed for data exchange between two integrated circuits (e.g. microcontroller <--> eeprom) which are …