RS-485 bus-based high-speed serial remote data transmissions

Cheng Li, Peng Wang, Tianhuai Ding, Ken Chen, Lizhong Geng

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


A high-speed serial data transmission method based on the RS-485 bus was developed using FPGA technology to implement the high-speed remote long wire transmission for industrial systems. The effects of the RS-485 bus on the data transmission are analyzed with the peripheral interface circuits then determined by pulse transmission experiments. The rising/falling edges of the serial signals are used as the start symbols for the high-speed clock sampling to enable bit synchronization. The 8 B/10 B encoded data streams make time-clock recovery and data frame synchronizations feasible. Data transmission experiments using a twisted-pair cable show that the system provides high-speed remote data transmission along a 220 m twisted-pair cable at transmission rates of up to 20 Mb/s with an error rate of 10-11, which offers an effective transmission method for monitoring data collected in the field.

Original languageEnglish
Pages (from-to)684-687
Number of pages4
JournalQinghua Daxue Xuebao/Journal of Tsinghua University
Issue number5
StatePublished - May 2009
Externally publishedYes


  • High speed
  • RS-485 bus
  • Remote data transmission
  • Serial communication


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