Technical Articles

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  USB to Serial: Enumeration, Virtual COM and UART Data

  Explains virtual COM and buffering from USB data to UART characters, distinguishing RS232, RS485 and TTL, and verifying the chain.

  First published 2026-10-16· Fundamentals· ID 14233Views 113 +1
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  RS485 Fiber Rings: Master Polling, Backup Paths and Fault Tests

  An RS485 fiber ring needs coordinated serial access and a supported protection mechanism. Check each slave with a known read-only request.

  First published 2026-10-16· Networking & Configuration· ID 14192Views 97 +1
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  MEMOBUS over Fiber: Transparent Serial Data and Turnaround Timing

  Transparent serial fiber extension carries compatible serial data; it does not automatically interpret or translate MEMOBUS transactions.

  First published 2026-10-16· Networking & Configuration· ID 14188Views 83 +1
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  Multiple RS485 Instruments over One Fiber Pair: Polling and Timing

  Multiple addressed instruments can share a supported serial network when wiring, bus ownership and protocol timing agree.

  First published 2026-10-16· Fundamentals· ID 14148Views 111 +3
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  UART Logic Levels, RS232 and RS485: Electrical Conversion

  UART character handling and the electrical line interface are different layers. Match the complete character configuration at both ends.

  First published 2026-10-16· Fundamentals· ID 14140Views 109 +2
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  Choosing a Four-Branch RS485 Hub: Ports, Isolation and Roles

  Choose an RS485 hub by upstream and branch roles, active drivers, real isolation boundaries and polling timing. Four branches do not create four serial services.

  First published 2026-10-15· Selection Guide· ID 13877Views 83 +0
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  RS485 Reliability: Termination, Biasing and Power-Up Behavior

  Design RS485 reliability around each electrical segment, coordinated termination and biasing, predictable driver startup and repeatable protocol tests.

  First published 2026-10-15· Networking & Configuration· ID 13813Views 94 +4
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  How RS485 Hubs Work: Segmentation, Termination and Polling

  Follow RS485 reception, branch re-driving and shared replies. Plan termination per electrical segment and verify the complete polling cycle after expansion.

  First published 2026-10-15· Networking & Configuration· ID 13789Views 124 +3
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  RS485 Isolation: Signal Barriers, Power and Port Protection

  Trace RS485 signal isolation, isolated power and transient protection separately, including test cables or shared references that can bypass a barrier.

  First published 2026-10-15· Fundamentals· ID 13785Views 99 +2
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  RS485 Hub Troubleshooting: Wiring, Timing and Fault Isolation

  Locate RS485 hub faults using request/reply timing, minimal-branch comparisons and valid messages, then verify recovery of isolated and healthy channels.

  First published 2026-10-15· Troubleshooting· ID 13781Views 86 +1