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  • Designing RS-485 Circuits
    When a network needs to transfer small blocks of information over long distances, RS-485 is often the interface of choice. The network nodes can be PCs, microcontrollers, or any devices capable of asynchronous serial communications. Compared to Ethernet and other network interfaces, RS-485's
  • RS-485 Transceiver Tutorial
    typical RS-485 ICs and explore the most common design considerations. Then, we'll examine electrostatic discharge protection and compare the Human Body Model and IEC61000-4-2 standards. Finally, we'll discuss over voltage protection and provide a snapshot of very high-speed transceivers (above 25Mbps
  • RS-485 Masterclass - What is it and Why use it?
    In February 2015 MD of Brainboxes, Eamonn Walsh, presented a series of lectures with the Institute of Measurement and Control relating to the benefits and common issues of RS-485 in industry. Part 1 of his lecture looked at the benefits of RS-485 and we present a selection of the concepts
  • Eliminate the Risk of RS-485 Data Corruption
    The RS-485 communications standard was introduced in 1983 by the Electronic Industries Alliance (EIA) as a two-wire, half-duplex, multi-drop alternative to the point-to-point RS-232 interface. (Note: RS-485 can also be wired using 4-wires to enable full-duplex communication). RS-485 uses
  • The Elements of an RS-422 and RS-485 System
    Learn the important aspects of RS-422/485 system design. The Elements of an RS-422 and RS-485 System: System configuration. - Cabling selection. - Transient protection. - Software. - Device selection
  • Over-Voltage Protection for RS-485 Bus Nodes
    RS-485 has been widely deployed because of its large differential signal swing and reliable operation over a wide common-mode voltage range. However, with this widespread use comes an increasing demand for greater robustness. This article discusses the difference between over-voltage and transient
  • RS-485 Isolator Raises the Bar for Bus Node Designs
    This white paper focuses on isolated digital interfaces conforming to RS-485, which continues to be the industry's workhorse standard for data transmission. We'll provide an overview of RS-485's common-mode voltage range (CMVR) definition, and explain how isolating a transceiver's signal and supply
  • Design Considerations for High-Speed RS-485 Data Links
    The trend in high-speed data networks continues to push for higher data rates over longer transmission distances, and under ever-harsher conditions. This article provides system designers new to high-speed RS-485 designs with an overview of standard and high-speed RS-485 networks. We begin
  • AN202 LDM485 to LDM485 to Other RS-485 Devices Configuration
    For LDM485 or other RS-485 device at the extreme ends of the line: The need for termination depends on data rate, line length, cable electrical characteristics and environment, and if applicable, the number of multidropped devices. This is best determined by switching in or out each termination

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