The Understanding EIA-485 Video Series discusses the popular EIA-485 technology— commonly called RS-485 — used for interconnecting network devices.
In this video we discuss two important issues with multipoint systems — termination and bias. Terminating a data cable properly reduces reflections that could cause data errors. Correct bias assures that each device on the bus properly interfaces with the bus for reliable operation.
Understanding EIA-485 Part 1: Introduction
TIA standard, general electrical characteristics and the various technologies that use EIA-485. (4:36)
Understanding EIA-485 Part 3: Connectors, Grounding and Protection
Review the importance of connectors as well as grounding, especially the distinct needs of two-wire and three-wire systems. (6:36)
Understanding EIA-485 Part 4: Cabling and Repeaters
Cables attenuate and distort signal, so cable selection depends on data rate, encoding, distance. Repeaters that use the data link protocol are more reliable than basic EIA-485 repeaters. (5:35)
Understanding EIA-485 Part 5: 10 Recommendations
To complete our series on Understanding EIA-485 Networks, here are 10 recommendations for implementing the technology. (3:15)