Some of these converters can convert from RS232 to both RS485 and RS422 however many standard models only has one of the protocols. The serial RS232 to RS485 converter and RS232 to RS422 converter units, also called serial converters, are small electronic devices used to convert a serial RS232 signal, (for example the COM port in older computers) into either RS485 or RS422 signals. If the 8-core cable shipped with the device is used for RS485 communication, please trim the length and try to use a short wire to reduce noise interference. Serial Monitor works by installing a filter driver on top of a serial device driver. All about RS485 - How RS485 Works and How to Implement RS485 into Industrial Control Systems? RS485, also known as TIA/EIA-485 is a standard serial communications protocol defining the electrical characteristics of a serial converter, drivers and receivers for use in balanced RS485 digital multipoint systems. In contrast to EIA-485 (which is multi-point instead of multi-drop), EIA-422/V.11 does not allow multiple drivers but only multiple receivers. A RS232 - RS422 converter is a 4-wire, full-duplex, differential protocol with multi-drop capabilities and a recommended distance limit of 4000ft. ANSI/TIA/EIA-422-B is the American national standard for the RS422 protocol.
With multi-drop (many devices on the same bus) and extensive cabling lengths, it's easy to see why the RS485 is so popular in the industrial and automation worlds. Why use a RS232 - RS485 /RS422 converter? So in order to transfer data from a RS232 serial interface engineers need a converter to be able to connect to a RS485 or RS422 interface. And what is a RS232 to RS422 converter? However since only a true RS485 network can have addressable serial RS485 devices, the RS232 converter needs to be addressable either by software or by DIP switches when using it in this type of configuration. The twisted pairs in RS485 give immunity against electrical noise, making RS485 viable in electrically noisy environments. The RS422 converter is used for data transmission, using balanced or differential signaling, it is mainly used in industrial and commercial environments since lots of process equipment and machinery have this protocol built-in.
Even RS485 is not commonly as popular as RS232 it is extremely useful for converters in industrial and commercial environments. Most newer consumer electronics comes with an USB, Firewire or other high-speed communication port, however a lot of industrial and commercial equipment, both old and new, is made only with a RS485 or RS422 serial communications port. RS485 has many advantages over other standards, especially when it comes to applications in noisy industrial environments. First, we will go over the Gen 2 and Gen 3 modules, because they are more common. Note. We are developing an online serial port monitor now. Download our rs232/422/485 port monitor and serial datalogger/parser/decoder now! A wide set of built-in and custom data visualizers and exporters are provided to give the user powerful insight on the monitored data.The built-in powerful Serial Terminal module provides a versatile terminal emulation environment which can be used in collaboration with a running monitoring session.Serial Monitor provides rich support for MODBUS protocol and devices, including specialized data visualizers, MODBUS Send window (MODBUS packet builder and sender) and full MODBUS protocol definition.Virtually every component of the Serial Monitor may be programmatically controlled by a running script, written in Typescript (superset of Javascript).Download this software rs232/rs422/rs485 serial protocol analyzer now!
This way you can extend the RS422 signal for up to 4000 feet. Without termination resistors, signal reflections off the unterminated end of the cable can cause data corruption. Extending a RS232 line is done by converting the RS232 signal into RS422 and then back to RS232 at the remote end. Usually a RS232 - RS485 converter is the preferred way to establish multi-point networks when working with RS232 devices. The advantage of the RS485 protocol is that this it can transfer data over longer distances, up to 4000 feet, and have up to 32 nodes per single network, and it can be used for multi-point networks where multiple serial devices are setup in a bus network. Since RS-485 is a multi-point specification, however, this is not necessary or desirable in many cases. RS-485 serves as a physical layer for the AES3 digital audio interconnect. Converters between RS-485 and RS-232 are available to allow a personal computer to communicate with remote devices. All in all, RS485 really allowed full automation possible with its ability to connect so many devices at once. This is a method for connecting multiple RS485 devices with each other over a two-wire network. The RS232 - RS422 converter is also often used in older serial devices such as older PLC's and terminal equipment.
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