Comparative analysis of RS-485 and 10BASE-T1S in industrial automation
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School of Electrical Engineering |
Bachelor's thesis
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en
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33
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RS-485 industrial field level communication networks have been used for decades and remain a significant part of modern industrial automation environments. However, the presence of multiple higher level protocols based on RS-485 makes such communication systems difficult to build and maintain. Furthermore, RS-485 communication systems are challenging to integrate into industrial monitoring systems which utilize the Ethernet protocol. Integration of RS-485 into the Ethernet ecosystem requires the use of protocol converters and gateways. The recently emerged 10BASE-T1S standard addresses these problems by bringing Ethernet directly to the industrial field level. This thesis presents a comparison of the RS-485 and 10BASE-T1S standards. The comparison includes data transfer rates, cabling requirements, maximum allowed number of nodes on the same bus, medium access mechanisms, cybersecurity capabilities, and hardware implementation complexity. The study provides an overview of the strengths and weaknesses of each communication standard, also describing the feasibility of migration from RS-485 to 10BASE-T1S. The results of the comparison indicate that RS-485 remains the most suitable alternative for industrial communication systems with low data rates and long cable distances. Meanwhile, for systems featuring higher data rates and shorter cable lengths 10BASE-T1S has many advantages such as hardware cost reduction and ease of integration into Ethernet ecosystem. Additionally, there are more Single-Pair Ethernet standards such as 10BASE-T1L that could be explored. These standards support longer transmission distances but they have other limitations in comparison with 10BASE-T1S.Description
Supervisor
Turunen, MarkusThesis advisor
Kärnä, MikaKallio, Janne