Honeywell 51305380-100 Media Access Unit Cable

The Honeywell 51305380-100, also cataloged as the 51305380 Media Access Unit Cable, operates as a dedicated hardware component for high-frequency data transmission within TDC 3000 / Experion PKS automation networks. The specialized cable assembly establishes a direct physical and electrical connection between a Local Control Network Processor (such as the LCNP4 card) and a Media Access Unit (MAU) transceiver to execute deterministic token-pass signaling.

Hardware Specifications

Process Control & DCS Instrumentation Interface

• FOUNDATION Fieldbus / Profibus PA Connectivity Coordination This interface assembly functions strictly within the high-speed Local Control Network (LCN) backbone layer, bridging coaxial transceiver elements directly into processing node memory registries. By running deterministic network traffic through dedicated 15-pin data channels, the assembly operates entirely isolated from, yet completely parallel to, lower-tier field instrumentation networks like FOUNDATION Fieldbus or Profibus PA drops.
• Channel-to-Channel Isolation Control Support The cable assembly incorporates dedicated, independent drain lines and internal shielded foil wrapping for individual internal conductor groups. This mechanical architecture complements the channel-to-channel isolation circuits of the connected LCNP4 card and MAU transceiver hardware, containing high-frequency signal reflections and protecting data tracks from adjacent cross-talk.

Frequently Asked Questions

Q: What physical failure modes manifest if the 15-pin thumbscrews are not fully locked?

A: Failure to tighten the integrated mechanical shell screws can let the 15-pin female connectors back off slightly from the LCNP4 or MAU interface headers. This introduces contact resistance variations, triggers intermittent frame check sequence (FCS) network errors, or drops the node completely off the active Local Control Network token rotation.

Q: Can this cable be altered or extended manually in the field using standard wire splicing techniques?

A: No, field modifications or slicing are strictly prohibited. The assembly is engineered with precise characteristic impedance, propagation delay tuning, and continuous shielding profiles necessary for noise-free LCN data rates. Splices disrupt these electrical barriers, causing wave reflections that degrade local token-passing performance.