Honeywell 51402755-100 K4LCN-4 — Local Control Network Processor Card | TDC 3000 LCN Platform
Engineering Background
The Honeywell TDC 3000 (Total Distributed Control) system has been a cornerstone of process automation in refining, petrochemical, and power generation industries since its introduction. The Local Control Network (LCN) serves as the high-speed backbone interconnecting all intelligent nodes within the TDC 3000 architecture. The 51402755-100 K4LCN-4 Processor Card is the dedicated CPU module for LCN nodes, providing the computational core that manages real-time data acquisition, control execution, and peer-to-peer communication across the network.
Product Positioning
Designed for procurement engineers and maintenance teams responsible for sustaining legacy TDC 3000 installations, this processor card is a direct replacement or spare for aging LCN node CPUs. Konmask.com sources, inspects, and supplies this module to industrial facilities worldwide, ensuring continuity of critical process control operations without the risk of unplanned downtime.
Complete Technical Specifications
| Manufacturer | Honeywell Process Solutions |
| Part Number | 51402755-100 |
| Model | K4LCN-4 |
| Module Type | LCN Processor Card (CPU Module) |
| Platform | Honeywell TDC 3000 / TotalPlant Solution (TPS) |
| Network | Local Control Network (LCN) |
| Form Factor | Single-slot VME-style card |
| Weight | 180 g (approx.) |
| Operating Temperature | 0 °C to 60 °C (32 °F to 140 °F) |
| Humidity | 5% to 95% RH, non-condensing |
| Power Supply | Supplied via backplane (node chassis) |
| Compatibility | TDC 3000 LCN Node Chassis; compatible with AM, APP, HM, NIM, and related LCN node types |
| Revision / Suffix | -100 (standard production revision) |
| Condition | Refurbished / Surplus — tested and verified |
| Warranty | 12-month Konmask operational warranty |
Proven Application Environments
- Petroleum Refining: Crude distillation units, hydrotreaters, and FCC unit control systems running TDC 3000 LCN architectures.
- Petrochemical Plants: Ethylene crackers, polymer reactors, and utility systems with long-lifecycle DCS installations.
- Power Generation: Boiler management, turbine control, and balance-of-plant automation on TPS/TDC 3000 platforms.
- Pulp & Paper: Continuous digester and recovery boiler control loops dependent on LCN node integrity.
- Pharmaceutical Manufacturing: Validated batch control environments where hardware change management requires exact OEM part numbers.
- Chemical Processing: Reactor temperature and pressure control in facilities with multi-decade TDC 3000 installed bases.
Engineering Advantages
- Drop-in Replacement: Exact OEM part number 51402755-100 ensures hardware and firmware compatibility without node reconfiguration.
- Sustains Legacy Infrastructure: Extends the operational life of TDC 3000 LCN nodes, deferring costly full-system migrations.
- Pre-tested Module: Each unit undergoes functional verification prior to shipment, reducing commissioning risk.
- Immediate Availability: Stocked for rapid dispatch — critical for emergency maintenance scenarios where downtime cost is high.
- Traceable Sourcing: Full procurement documentation available upon request for regulated industries and audit compliance.
- Expert Technical Backup: Konmask engineering team provides pre-sale compatibility confirmation and post-sale integration support.
System Architecture & Signal Flow
Within the TDC 3000 LCN architecture, the K4LCN-4 processor card occupies the CPU slot of an LCN node chassis. It interfaces directly with the LCN coaxial highway via the node’s Network Interface Module (NIM), executing peer-to-peer data exchange at the LCN protocol layer. The processor manages all local control algorithms, database transactions, and operator display data for its assigned node. Redundant node configurations pair two K4LCN-4 cards in primary/backup roles, with automatic failover managed at the LCN protocol level — no operator intervention required during switchover.
Signal flow: Field I/O → IOP/FTA → UCN/LCN Gateway → LCN Highway → K4LCN-4 Processor → Application Module (AM) / History Module (HM) → Operator Console (US/GUS)
Sourcing & Quality Verification
- Source Traceability: Units sourced from decommissioned plant upgrades, OEM-authorized surplus channels, and controlled inventory pools.
- Incoming Inspection: Visual inspection for physical damage, connector integrity, and PCB condition.
- Functional Test: Power-on and communication verification in a TDC 3000-compatible test environment.
- ESD Packaging: Shipped in anti-static bags with foam cushioning inside double-wall cartons.
- Documentation: Certificate of conformance, test report, and packing list included with each shipment.
- Counterfeit Mitigation: All units cross-referenced against known OEM markings, label formats, and PCB revision indicators.
Procurement Process
- Confirm Compatibility: Share your node chassis type, current firmware revision, and application (AM/HM/NIM) with our team for pre-sale verification.
- Request a Quote: Contact [email protected] or call +0086 19859288691 for volume pricing, lead time, and export documentation.
- Place Order: Purchase directly via this listing or via purchase order (PO) for B2B accounts.
- Shipment: Orders dispatched within 1–3 business days. Express freight available for emergency requirements.
- Receiving Inspection: Verify part number, revision suffix, and physical condition upon receipt. Contact us within 5 business days for any discrepancies.
- Installation Support: Our engineers are available for remote commissioning guidance at no additional charge.
Technical FAQ
Q: Is the 51402755-100 compatible with both TDC 3000 and TPS (TotalPlant Solution) systems?
A: Yes. The K4LCN-4 processor card operates in both TDC 3000 and TPS LCN node chassis, as TPS is the evolved successor platform sharing the same LCN hardware architecture.
Q: Can this card be used in a redundant node configuration?
A: Yes. Two K4LCN-4 cards can be installed in a redundant node chassis. The LCN protocol manages primary/backup switchover automatically.
Q: What is the difference between the K4LCN-4 and earlier K2LCN or K4LCN variants?
A: The K4LCN-4 represents a later processor generation with enhanced memory capacity and improved LCN communication throughput compared to K2LCN-series cards. Always verify your node’s firmware and chassis revision before substituting processor generations.
Q: Do you provide a test report with the unit?
A: Yes. A functional test report is included with every shipment. Additional third-party inspection or FAT (Factory Acceptance Test) can be arranged upon request.
Q: What is the lead time for emergency orders?
A: In-stock units ship within 24 hours of order confirmation. Contact us directly for emergency freight options including same-day dispatch where available.
Q: Can you supply multiple units for a plant-wide spare parts program?
A: Yes. Konmask maintains inventory depth for volume procurement. Contact us for blanket order arrangements and preferred supplier agreements.
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Contact: [email protected] | +0086 19859288691
