Design Considerations for High-Speed RS-485 Data Links

Những lưu ý thiết kế cho liên kế dữ liệu tốc độ cao RS-485. Tài liệu cung cấp cho người thiết kế có cái nhìn tổng quan về truyền dữ liệu tốc độ cao sử dụng RS-485.

The trend in high-speed data networks continues to push for higher data rates over longer transmission distances, and under ever-harsher conditions, including electrically noisy environments, large ground potential differences, and high operating temperatures. The primary applications pushing reliable high-speed transmissions to the breaking point include:
- Data acquisition systems in seismic networks
- GPS data transmission links in telecom base stations
- Video transport in traffic monitoring systems
- PLC communication in factory automation
- Motor encoders
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 with examining signal degradation on the bus and key transceiver requirements for reliable high-speed transmission, and then wrap up with design tips for system and bus node designs, along with a set of general high-speed design guidelines.