Honeywell LCN A Cable Experion Series

Configured for high-velocity deterministic data routing within Experion PKS environments, the Honeywell LCN A Cable, also cataloged as the LCN A Cable Local Control Network Coax Assembly, operates as a dedicated hardware component for localized signal conditioning and network trunk interconnectivity. This specialized 95-ohm physical media link interfaces distributed processing architectures, establishing structured low-loss paths that shield time-critical control frames from electromagnetic attenuation across the active Local Control Network (LCN).

Hardware Specifications

Process Control and DCS Metrics

• 4-20 mA HART Loop Protocol and Coaxial Coexistence: The coaxial assembly features dense multi-layered shielding architecture designed to isolate high-frequency network clock rates. This physical containment blocks the 95-ohm carrier wave from inducing parasitic cross-talk or EMI signals into neighboring analog termination blocks or low-potential 4-20 mA HART loop protocol lines sharing the same cabinet wireways.
• Channel-to-Channel Isolation and Noise Immunity: While acting as a serial data pipeline rather than an active input node, the high-density braid pairing acts as a passive noise shield. This layout maintains structural channel-to-channel isolation variables between adjacent communication ports, keeping common-mode voltage spikes and ground loops from penetrating backplane processor cards.

Frequently Asked Questions

Q: Why does the LCN A Cable specify a strict 95-ohm impedance parameter rather than standard 50-ohm or 75-ohm coaxial values?

A: The 95-ohm rating matches the precise input impedance of the legacy and modern LCN network transceiver circuit blocks. Utilizing a standard 50-ohm or 75-ohm cable would create a severe impedance mismatch, resulting in an increased VSWR above the 1.3:1 limit, causing signal wave reflections and data packet corruption.

Q: Can this 2-meter cable assembly be altered or field-spliced if a different length profile is required?

A: No. The assembly comes factory-terminated and certified with fixed attenuation limits (less than 6 dB at 1 GHz). Field cutting or mechanical splicing alters the physical geometry of the internal conductors, degrading the VSWR rating and compromising the deterministic timing of the Experion network.

Field Installation Guidelines

• Chassis Layout Alignment, Clearance Constraints, and Mechanical Seating: Route the 2-meter cable profile with a continuous sweeping bend radius, ensuring it never drops below the minimum specified 50 mm static bend boundary. Click the RJ-45 terminating connectors square into the assigned LCN module sockets until the mechanical locking tab snaps firmly, avoiding twisting tension on the module connector faces.
• Conductor Separation, Wireway Constraints, and Shield Grounding: Place the LCN coaxial cable assembly inside dedicated communication wire channels, completely isolated from any high-current AC mains wiring, 480 VAC distribution paths, or motor drive cables. Ensure the outer connector shielding ring grounds properly against the chassis frame mating block to discharge high-frequency noise transients down to the cabinet copper ground bus bar.