Honeywell LCN A Coax Cable

Honeywell LCN A, also cataloged as the LCN A Coax Cable, provides direct physical/electrical execution.

Hardware Specifications

Process Control and DCS Instrumentation

• FOUNDATION Fieldbus / Profibus PA Connectivity: The coaxial physical layer facilitates stable high-frequency carrier transmission for the Local Control Network (LCN). This architecture links Network Interface Modules (NIMs) and Global User Stations (GUS) with zero propagation skew, ensuring deterministic token ring timing sequences across peer-to-peer DCS topologies.
• Channel-to-Channel Isolation Performance: High-coverage double braided shielding provides excellent electrostatic and electromagnetic isolation between parallel running network channels. This shielding prevents industrial EMI noise from corrupting data frames, maintaining network packet integrity down to the millisecond scale.

Frequently Asked Questions

Q: Can standard commercial 50-ohm or 75-ohm coaxial cables be substituted for the LCN A cable?

A: No. The Honeywell LCN architecture relies strictly on 95-ohm characteristic impedance matching. Introducing incorrect impedance cables will cause signal reflections, high VSWR, and critical network dropouts.

Q: How should the minimum bend radius of the LCN A cable be handled during installation?

A: To prevent mechanical deformation of the internal dielectric material and maintain the 95-ohm impedance profile, do not exceed a minimum dynamic bending radius of 50 mm.

Field Installation Guidelines

• Connector Isolation Sleeve Placement: Ensure the protective rubber/plastic insulation sleeves cover the metal BNC connector shells completely. Direct electrical contact between the connector shell and the cabinet's metallic structural frame must be prevented to avoid ground loops.
• Shield Grounding Control: The LCN coaxial trunk system must be grounded at only one designated master location within the network segment. Do not ground both ends of the LCN A drop line locally, as this will create destructive circulating ground currents.
• Strain Relief Hookup: Secure the cable assembly using non-metallic wire clamps immediately adjacent to the module termination port. Removing physical cable weight strain protects the internal board-mounted BNC receptacles from continuous mechanical stress.