Honeywell 51308111-002 Replacement for TDC 3000 LCN Network

Product Overview

Honeywell 51308111-002 Replacement for TDC 3000 LCN Network: Seamless Migration & Upgrade Solution

The Honeywell 51308111-002 is a critical LCN (Local Control Network) coaxial cable assembly used within the TDC 3000 Distributed Control System architecture. As Honeywell progressively phases out legacy TDC 3000 components, many facilities operating continuous process industries — including refining, petrochemical, pulp and paper, and power generation — face the urgent challenge of sourcing verified replacement cables to maintain network integrity without triggering a full system overhaul.

TOPNLMS maintains verified stock of the 51308111-002 to support both emergency replacement and planned migration projects. Whether your facility is executing a like-for-like swap of a failed cable segment or undertaking a phased migration from TDC 3000 toward Experion PKS, this cable assembly provides the physical network continuity your LCN backbone depends on.

The LCN is the high-speed deterministic network that interconnects all TDC 3000 nodes — including the History Module (HM), Application Module (AM), Universal Station (US), Network Interface Module (NIM), and the Hiway Gateway (HG). A degraded or failed coaxial cable segment in this network can cause node dropouts, communication timeouts, and in worst cases, unplanned process shutdowns. The 51308111-002 is engineered to the exact impedance, shielding, and connector specification required by the TDC 3000 LCN, ensuring signal integrity across the full network span.

Compatibility Comparison Table

Seamless Upgrade Solutions

A successful TDC 3000 LCN cable replacement or migration project rarely involves a single component. In practice, field engineers replacing the 51308111-002 are often simultaneously addressing adjacent network and I/O infrastructure. The following components are commonly required in the same migration scope:

When replacing LCN cable segments, the Honeywell 51401641-100 LCN Tap is frequently replaced in parallel, as aged taps introduce impedance mismatches that degrade network performance even after a new cable is installed. Similarly, the Honeywell 51304485-100 Network Interface Module (NIM) is a common co-replacement item when the LCN is being restructured to support Experion PKS migration, as the NIM bridges the legacy LCN to the newer FTE (Fault Tolerant Ethernet) backbone.

For facilities also upgrading their I/O infrastructure, the Honeywell 51304754-150 FTA (Field Termination Assembly) and 51309276-175 Analog Input Module are typical additions to the same purchase order, allowing the control room to consolidate both network and I/O modernization into a single planned outage window. The Honeywell 51198685-100 Power Supply Module is another component that maintenance teams often inspect and replace during the same shutdown, given that aging power supplies are a leading cause of node instability on TDC 3000 systems.

On the communication side, facilities migrating toward Experion PKS often require the Honeywell CC-PCNT01 C300 Controller and associated Honeywell CC-TAIX01 Analog Input FIM to begin parallel operation alongside the legacy TDC 3000 nodes. Programming and configuration of these new controllers is typically performed using Honeywell Control Builder engineering software, which supports both legacy and new platform configuration in a unified environment.

For sites that retain the TDC 3000 Universal Station (US) as the primary operator interface during the transition, the Honeywell 51401094-100 US Keyboard Assembly and 51196887-100 US Video Card are common spare parts that extend the operational life of the operator console while the migration is completed in phases. This approach minimizes operator retraining costs and allows the facility to maintain familiar HMI workflows during the cutover period.

Retrofit Guidance FAQ

Q: Can I replace the 51308111-002 without taking the LCN offline?
A: In most TDC 3000 installations, the LCN operates as a redundant dual-coaxial network. If your site has dual LCN configured, it is possible to replace one cable segment while the redundant path maintains communication. However, this must be confirmed against your specific network topology and site safety procedures before any hot-swap attempt. TOPNLMS recommends coordinating with your DCS engineer and scheduling replacement during a planned maintenance window.

Q: Does the 51308111-002 require any re-termination or field modification?
A: No. The 51308111-002 is a factory-terminated cable assembly. It is designed for direct plug-in replacement at the LCN tap points without field splicing or re-termination. This significantly reduces installation time and eliminates the risk of impedance mismatch introduced by field-cut cables.

Q: Is this cable compatible with both the original TDC 3000 and the TDC 3000x (extended) platform?
A: Yes. The LCN coaxial specification is consistent across TDC 3000 and TDC 3000x installations. The 51308111-002 is compatible with both platforms, including all standard LCN node types: History Module, Application Module, Universal Station, Network Interface Module, and Hiway Gateway.

Q: What communication protocol does the LCN use, and does this cable support it?
A: The Honeywell LCN uses a proprietary 5 Mbps coaxial-based protocol. The 51308111-002 is manufactured to the exact impedance and shielding specification required by this protocol. Generic coaxial cable (e.g., standard RG-6 or RG-11) is not a suitable substitute and will introduce signal degradation and node communication errors.

Q: We are migrating from TDC 3000 to Experion PKS. Is this cable still relevant during the transition?
A: Yes. Most Experion PKS migrations are executed in phases over 12–36 months. During this period, the legacy TDC 3000 LCN must remain fully operational to support the nodes that have not yet been migrated. Maintaining a healthy LCN cable infrastructure is essential to avoid unplanned outages during the migration window.

Q: What is the lead time and shipping arrangement?
A: TOPNLMS ships from Xiamen, China. In-stock units are dispatched within 1–3 business days. International express shipping (DHL / FedEx) is available for urgent requirements. Please contact us at [email protected] or +86 18359293191 to confirm current stock and arrange expedited shipment.

Warranty Assurance

Every 51308111-002 unit shipped by TOPNLMS is covered by a 12-Month Warranty from the date of shipment. Prior to dispatch, each unit undergoes visual inspection and connector integrity verification to confirm it meets OEM specification. In the event of a confirmed defect or failure within the warranty period, TOPNLMS will arrange replacement or credit at no additional cost to the buyer.

Our warranty commitment reflects the operational criticality of DCS network components. We understand that a failed LCN cable in a continuous process environment is not a minor inconvenience — it is a potential production loss event. Our after-sales response team is reachable via email and phone to support troubleshooting, documentation requests, and replacement coordination.

For B2B procurement teams requiring formal documentation, TOPNLMS can provide a commercial invoice, packing list, certificate of conformance, and test record upon request. We support standard payment terms for qualified industrial buyers and can accommodate purchase order-based procurement workflows.