Dec 19, 2023 · RS485, also known as EIA-485, is a widely used communication standard in the field of industrial automation and control systems. What is rs485 - It is a serial communication protocol that allows multiple devices to communicate …

In 1983, the Electronics Industries Association (EIA) approved a new balanced transmission standard called RS-485. Finding widespread acceptance and usage in industrial, medical, and consumer applications, RS-485 has become the industry’s interface workhorse.

The impedance control allows for the PCB transmission lines to match the characteristic impedance of the cabling that is typically used and the termination resistances, which are typically 120 Ohms per the RS-485 standard's guidelines.

Applications for RS-485/RS-422 include process control networks; industrial automation; remote terminals; building automation, such as heating, ventilation, air conditioning (HVAC), security systems; motor control; and motion control.

For architectural reasons, we have a need to take a twisted pair (of an RS485 bus) into a PCB and then out. The PCB traces would add about 2 cm (just less than an inch) of length to the bus. The stubs connected to this differential trace pair in the PCB are very short (<1 cm).

Feb 22, 2025 · RS485 is a balanced differential serial communication protocol. It is widely used in industrial automation, embedded systems, and long-distance data transmission. It supports multiple devices on the same bus and allows for noise-resistant data …

Mar 18, 2021 · In short, RS485 is a standard defining the electrical characteristics of serial lines for use in serial communications systems. It is essentially a form of serial communication. It may sound complicated for those who don’t know what is serial communication, so here’s an explanation. In this article, we’ll go through: What is Serial Communication?

Many common RS-485 questions can be resolved with a basic understanding of the structure and operation of the driver and receiver. This section discusses the RS-485 driver and the relevant specifications in the RS-485 standard. Figure 2-1 shows the equivalent output schematic for the driver of the THVD1550 half-duplex transceiver from TI.

Verified Designs offer theory, component selection, simulation, complete PCB schematic and layout, bill of materials and measured performance of useful circuits. This reference design demonstrates a dual isolated, half-duplex repeater with data rate independent flow-control for long-haul RS-485 networks.

Sep 12, 2023 · RS-485 is a communication standard for transmitting and receiving data over long distances between devices. It uses a balanced pair of wires to send signals and can communicate at high speeds over distances up to 1200 meters.