Honeywell 51401551-300 K2LCN-3 Processor Board

The Honeywell 51401551-300, also cataloged as the K2LCN-3 Processor Board, operates as a dedicated hardware component for high-speed data processing and system node communication within Honeywell TDC 3000 Local Control Network platforms.

Hardware Specifications

4-20 mA HART Loop Protocol and Channel-to-Channel Isolation

The 51401551-300 circuit board manages high-density processing streams across the Local Control Network bus structure, serving as the central logic engine for connected node cards. Built-in channel-to-channel isolation prevents electrical surges and common-mode line noise from propagating across the backplane bus. The processing logic filters digital signal channels and coordinates analog field inputs, stabilizing 4-20 mA HART loop protocol telemetry and maintaining scan rates during high-traffic bus arbitration cycles.

Frequently Asked Questions

Q: What power input arrangement does the 51401551-300 board utilize?

A: The board incorporates dual DC/DC power inputs that convert incoming backplane power into a regulated 6.3 VDC supply to maintain processor core operations under redundant power supply configurations.

Q: Can the 51401551-300 board be replaced while the TDC 3000 rack remains powered?

A: Technicians must verify system redundancy and follow node bypass procedures prior to board removal to prevent Local Control Network bus disruption or ESD damage to edge connections.

Field Installation Guidelines

Align the circuit board edges with the enclosure card guides and press firmly to seat the rear multi-pin bus connectors into the backplane. Secure all front retention fasteners to maintain grounded chassis contact and mechanical retention against vibration.

Ensure cabinet cooling fans function properly to deliver continuous airflow over the high-density processing components, maintaining ambient enclosure temperatures within 0 to 60 deg C. Ground all cable shields directly to the main copper busbar using short, low-impedance grounding straps. Separate signal lines from high-voltage AC power wiring by a minimum distance of 300 mm to avoid electromagnetic cross-talk.