Honeywell 51190916-104 – Isolating Coax Tap Assembly | TDC 3000 / TotalPlant DCS Platform
Engineering Background: The Honeywell TDC 3000 and TotalPlant Solution (TPS) distributed control systems are the backbone of process automation in refining, petrochemical, and power generation facilities worldwide. Signal integrity across the Local Control Network (LCN) and Universal Control Network (UCN) is mission-critical — any degradation in coaxial signal transmission directly impacts loop stability and plant uptime.
Product Positioning: The Honeywell 51190916-104 Isolating Coax Tap Assembly is an OEM-grade passive network tap component designed to provide galvanically isolated signal access points on TDC 3000 / TPS coaxial bus segments. It eliminates ground loops and shields sensitive control signals from electrical noise, ensuring clean, reliable data transmission between nodes. This part is a direct replacement for aging or failed tap assemblies in existing LCN/UCN infrastructure.
Complete Technical Specifications
- Part Number / SKU: 51190916-104
- Manufacturer: Honeywell Process Solutions
- Series / Platform: TDC 3000 / TotalPlant Solution (TPS)
- Component Type: Isolating Coaxial Tap Assembly
- Function: Galvanic isolation tap for LCN / UCN coaxial network segments
- Network Compatibility: Local Control Network (LCN), Universal Control Network (UCN)
- Isolation Type: Passive galvanic isolation
- Connector Interface: Coaxial (BNC / TNC compatible per TDC 3000 bus standard)
- Weight: Approx. 220 g
- Country of Origin: United States
- Condition: New / Refurbished OEM (specify at inquiry)
- Compliance: CE, RoHS (per Honeywell product family declaration)
Proven Application Environments
- Oil & Gas refineries running TDC 3000 / TPS DCS platforms
- Petrochemical and chemical processing plants with UCN-based loop control
- Power generation facilities using Honeywell LCN infrastructure
- Pulp & paper and pharmaceutical plants with legacy TDC 3000 installations
- Any facility requiring coaxial bus tap replacement or network expansion on TDC 3000 / TPS systems
Engineering Advantages
- Galvanic Isolation: Eliminates ground loops that cause signal noise and erratic loop behavior
- OEM Compatibility: Direct form-fit-function replacement — no re-engineering or re-wiring required
- Signal Fidelity: Maintains coaxial bus impedance matching to prevent reflections and data errors
- Passive Design: No external power required; inherently fail-safe in the signal path
- Plug-and-Play: Designed for rapid field replacement to minimize maintenance windows
- Long Service Life: Built to Honeywell’s industrial-grade durability standards for continuous process environments
System Architecture & Signal Flow
In a TDC 3000 / TPS architecture, the LCN and UCN coaxial buses interconnect Hiway Gateway (HG), Application Modules (AM), History Modules (HM), and Universal Stations (US). The 51190916-104 Isolating Coax Tap Assembly is installed at each node tap point on the coaxial trunk cable. Its isolation transformer decouples the node’s ground reference from the bus ground, preventing common-mode noise from propagating across the network. Signal flow: Coaxial Trunk → Tap Assembly (isolation stage) → Node Drop Cable → Module Connector.
Sourcing & Quality Verification
- All units sourced from authorized Honeywell distributors or verified OEM surplus channels
- Each unit inspected for physical integrity, connector condition, and isolation continuity prior to shipment
- Traceability documentation (lot number, date code) available upon request
- Certificate of Conformance (CoC) available for critical process applications
- Anti-static packaging with humidity indicator card for safe transit
Procurement Process
- Submit your RFQ via the product page or email [email protected]
- Receive a formal quotation with lead time, condition, and traceability details within 24 hours
- Confirm order and provide shipping address / Incoterms preference
- Payment via T/T, PayPal, or credit card (net terms available for qualified accounts)
- Shipment via DHL / FedEx / UPS with full tracking; export documentation included
Technical FAQ
Q: Is 51190916-104 compatible with both LCN and UCN networks?
A: Yes. The isolating tap assembly is designed for use on both the Local Control Network (LCN) and Universal Control Network (UCN) coaxial bus segments within TDC 3000 / TPS systems.
Q: Can this part be used as a direct drop-in replacement without system reconfiguration?
A: Yes. It is a form-fit-function OEM replacement. No software changes or network reconfiguration are required.
Q: Do you supply new or refurbished units?
A: Both conditions are available. Please specify your requirement at the time of inquiry. All units are tested and verified before shipment.
Q: What is the typical lead time?
A: In-stock units ship within 1–3 business days. For sourced units, lead time is typically 5–10 business days. Contact us for current stock status.
Q: Can you provide a Certificate of Conformance?
A: Yes. CoC is available upon request for all shipments.
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