Honeywell K4LCN-16 (51403519-160) – Local Control Network Interface Module | TDC 3000 DCS Platform
Engineering Background
The Honeywell TDC 3000 (Total Distributed Control) platform has been the backbone of continuous-process automation in refining, petrochemical, and power generation facilities for decades. Its Local Control Network (LCN) architecture provides deterministic, high-speed communication between controllers, operator stations, and I/O subsystems — a design philosophy that remains operationally relevant in thousands of brownfield plants worldwide.
Product Positioning
The K4LCN-16 (Honeywell part number 51403519-160) is a Local Control Network interface module engineered for the TDC 3000 system cabinet. It serves as the critical communication bridge between the LCN highway and process control nodes, enabling real-time data exchange at the network layer. Procurement engineers sourcing replacement or spare modules for ongoing TDC 3000 operations will find this unit a direct, specification-matched solution.
Complete Technical Specifications
| Manufacturer | Honeywell Process Solutions |
| Part Number / SKU | K4LCN-16 / 51403519-160 |
| Module Type | Local Control Network (LCN) Interface Module |
| Platform | Honeywell TDC 3000 Distributed Control System |
| Network | Local Control Network (LCN) Highway |
| Form Factor | Card / Board Module (rack-mount) |
| Weight | 820 g (approx.) |
| Condition | Surplus / Refurbished (tested) |
| Warranty | 90-day functional warranty |
| Country of Origin | USA |
Proven Application Environments
- Petroleum refining and upstream oil & gas processing plants
- Petrochemical and specialty chemical manufacturing
- Power generation (coal, gas, and combined-cycle facilities)
- Pulp and paper continuous-process lines
- Pharmaceutical batch and continuous manufacturing
- Any brownfield facility operating a legacy Honeywell TDC 3000 DCS
Engineering Advantages
- Direct OEM Replacement: Exact part number match (K4LCN-16 / 51403519-160) eliminates compatibility risk and re-engineering effort.
- LCN Highway Integrity: Maintains deterministic communication timing critical to process safety and regulatory compliance.
- Extends Asset Life: Enables continued operation of proven TDC 3000 infrastructure without costly full-system migration.
- Tested Surplus Stock: Each unit undergoes functional verification before dispatch, reducing commissioning risk.
- Rapid Availability: In-stock surplus units ship within 2–5 business days, minimizing unplanned downtime exposure.
System Architecture & Signal Flow
Within the TDC 3000 architecture, the LCN highway operates as a token-passing coaxial network connecting all major system nodes — including the Universal Control Network (UCN), Application Modules (AM), History Modules (HM), and Operator Stations (US/GUS). The K4LCN-16 module resides in the system cabinet and manages the physical and data-link layer interface to this highway. Signal flow proceeds from field I/O → UCN gateway → LCN highway → K4LCN-16 interface → higher-level application and historian nodes. Proper seating, termination, and firmware revision alignment are prerequisites for stable operation.
Sourcing & Quality Verification
- All units sourced from decommissioned or surplus industrial installations with documented provenance.
- Visual inspection: PCB integrity, connector condition, component seating.
- Functional bench test against TDC 3000 LCN communication protocol.
- Anti-static packaging with humidity indicator card for safe transit.
- Serialized tracking maintained for full traceability.
Procurement Process
- Confirm Part Number: Verify K4LCN-16 / 51403519-160 against your TDC 3000 system BOM or existing module label.
- Request Quote: Contact support@konmask.com or call +0086 19859288691 for volume pricing and lead-time confirmation.
- Purchase Order: Standard NET-30 terms available for qualified industrial accounts; T/T and credit card accepted.
- Shipping: DHL / FedEx express international; EXW Xiamen or CIF destination port available.
- Documentation: Commercial invoice, packing list, and test report provided with every shipment.
Technical FAQ
Q: Is the K4LCN-16 compatible with both early and late TDC 3000 revisions?
A: The 51403519-160 revision is compatible with mid-to-late TDC 3000 system generations. Confirm your system’s LCN firmware revision with your DCS engineer before ordering if operating a very early (pre-1990) installation.
Q: Can this module be used in a TPS (TotalPlant Solution) system?
A: TPS systems share the LCN architecture with TDC 3000. Compatibility is generally maintained, but verify the specific cabinet slot and backplane revision with Honeywell documentation or our technical team.
Q: What is the lead time for this part?
A: In-stock units typically ship within 2–5 business days. Contact us for real-time availability confirmation.
Q: Do you provide a warranty?
A: Yes. All modules carry a 90-day functional warranty covering LCN communication performance under normal operating conditions.
Q: Can you source other TDC 3000 or Honeywell DCS parts?
A: Yes. Konmask.com maintains an extensive network for Honeywell TDC 3000, TPS, Experion PKS, and related legacy DCS components. Submit your full BOM for a consolidated quote.
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