• 목록
• 답변
• 글쓰기
• 게시판 리스트 옵션
  • 수정
  • 삭제

Works with 4 AA batteries (1.5V, alkaline or Lithium - for outdoor winter use you need to use AA lithium batteries because the alkaline ones suffer from the cold); on request it is also available for working with external 5V power supply. Bus powered, no external power supply needed. Devices will be linked together via a bus configuration as shown in the picture above. It is like the Universal Serial Bus (USB) or ethernet that we can find in many of our modern computers. You can find out more about the differences between RS485 and RS232 here. Here are the detailed specifications of RS485. Some of the examples are robotics, base stations, motor drives, video surveillance and also home appliances. It is commonly implemented to control video surveillance systems and link security control panels to devices such as access control card readers. Link PC to Serial devices such as printer, label writer, ISDN terminal adapter. Manufacturing facilities use serial communication to link their devices together. This whole system allows manufacturing facilities to control their devices remotely and also set-up automation.

RS485 is used as the physical layer for many standards and proprietary automation protocols to implement control systems, most commonly Modbus. Modbus is the world’s most popular automation protocol in the market. All in all, RS485 really allowed full automation possible with its ability to connect so many devices at once. Due to this and it being able to transmit data over long distances, the RS485 is used commonly as a protocol for POS, industrial and telecom. Most Modbus implementations use RS485 due to the allowance of longer distances, higher speeds and multiple devices on a single network. RS485 is made for serial communication with high speeds, support for long distances, and support for multiple devices (slaves). It is unquestionably an ideal choice for industrial equipment use due to its high speed, reliability, safety and versatility. Control and monitoring systems: A single pair of rs485 signal cable can connect up to 32 devices, with a signal transmission distance of up to 1200m. Therefore, using rs485 cables is an ideal choice for industrial control and monitoring systems, especially those with large-scale and high dispersion.

In this setup both the TX and RX share a single pair of wires, therefore it is limited to half-duplex data transmission as the data cannot be transmitted simultaneously to and fro each device. However, in a full-duplex setup, they are limited to a master and slave communication where slaves cannot communicate with each other. Modbus devices communicate using a Master-Slave technique where only one device (the Master) can initiate transactions (AKA queries). The maximum number of devices that can be connected to a main cable is 32, including the Master. RS485 main advantages as compared to other serial communication are tolerance to electrical noise, lengthy cable runs, multiple slaves in one connection, and fast data transmission speed. The greatest feature of RS485 is the fact that you can connect up to 32 devices on one system. For example, Belden 3105A cable can be specified, but different types of cable with equivalent characteristics can be used.

In short, RS485 is a standard defining the electrical characteristics of serial lines for use in serial communications systems. Commercial aircraft cabins also use RS485 for low-speed data communications. Serial communication is a way to send data. It is essentially a form of serial communication. Ultimately, it can be thought of in a way that serial communication is more made for this usage as compared to the common USB and ethernet. Compared to serial communication, USB and ethernet are significantly more complex and expensive. Support the conversion of USB to RS422/RS485 interface. The latest point of view on RS485 cables includes advancements in design to support higher data rates and improved resistance to environmental factors such as temperature fluctuations and moisture. From the latest point of view, advancements in technology have led to the development of enhanced RS485 cables that can support even higher transmission speeds and longer distances. This with WiFi transmission for the Standard version, and in the RF version also with radio transmission at 433MHz (covering longer distances and with less battery consumption thanks to special optimizations).

If you have any questions concerning where and the best ways to use rs485 cable, you can call us at our website.