Honeywell 51303976-400 Communications Card – TDC 3000 Distributed Control System
In a continuous process plant — whether a refinery, chemical reactor, or power generation facility — a single failed communications link between the operator console and the process controllers can cascade into unplanned shutdowns, product loss, and safety incidents. The Honeywell 51303976-400 Communications Card is the backbone of data exchange within the TDC 3000 architecture, ensuring that every control command, alarm signal, and process variable reaches its destination with deterministic reliability. Without it, the entire supervisory layer goes dark.
The 51303976-400 occupies a critical position within Honeywell’s TDC 3000 (Total Distributed Control) platform — one of the most widely deployed DCS families in global heavy industry. As a dedicated communications interface card, it manages the high-speed data highway traffic that connects Local Control Units (LCUs), Application Modules (AMs), and the Universal Control Network (UCN). Its proven design has made it a trusted component in thousands of installations across petrochemical, pulp & paper, pharmaceutical, and power sectors worldwide.
Technical Specifications
- Part Number: 51303976-400
- Manufacturer: Honeywell Process Solutions
- Series / Platform: TDC 3000 Distributed Control System
- Module Type: Communications Card / Data Highway Interface
- Form Factor: Plug-in card module (rack-mounted)
- Weight: 2,460 g (approx.)
- Compatibility: Honeywell TDC 3000 LCN / UCN / Data Hiway architecture
- Operating Environment: Industrial control cabinet, climate-controlled enclosure
- Condition Available: New surplus, refurbished, tested
Note: Konmask.com does not fabricate or alter manufacturer specifications. All parameters above are based on publicly available Honeywell documentation. Contact us to verify compatibility with your specific system revision.
Key Features & Benefits
- Deterministic Communication: Maintains time-critical data exchange across the TDC 3000 Local Control Network (LCN), preventing process upsets caused by communication latency.
- High Reliability Design: Built to Honeywell’s industrial-grade standards for 24/7 continuous operation in harsh process environments.
- Drop-in Replacement: Direct form-fit-function replacement for failed or end-of-life communications cards in existing TDC 3000 cabinets — no re-engineering required.
- Broad System Compatibility: Interfaces with Honeywell’s LCN, UCN, and Data Hiway network segments, supporting legacy and hybrid DCS configurations.
- Reduced Downtime Risk: Stocking a spare 51303976-400 eliminates the risk of extended outages caused by obsolete-part lead times, which can stretch to weeks or months on the open market.
- Tested Before Shipment: All units supplied by Konmask.com undergo functional verification prior to dispatch.
Industry & Equipment Applications
- Oil & Gas / Petrochemical: Refinery distillation columns, reactor control loops, pipeline SCADA integration
- Chemical Processing: Batch reactor management, continuous flow control, safety instrumented systems (SIS) interfacing
- Power Generation: Boiler management systems, turbine control, load dispatch coordination
- Pulp & Paper: Digester control, recovery boiler automation, machine drive coordination
- Pharmaceutical / Food & Beverage: GMP-compliant process control, clean-in-place (CIP) automation
- Water & Wastewater Treatment: Pump station control, chemical dosing, SCADA communication
System Integration & Compatible Parts
The 51303976-400 is designed to operate within the broader Honeywell TDC 3000 ecosystem. Commonly paired or replaced alongside:
- Honeywell TDC 3000 Local Control Unit (LCU) modules
- Honeywell Application Module (AM) cards
- Honeywell UCN Interface Modules
- Honeywell Data Hiway Coupler / Gateway cards
- Honeywell 51304485-100, 51304485-150, and related LCN communication series
If you are unsure whether this card is compatible with your specific cabinet revision or firmware version, our technical team can assist with cross-referencing your system’s bill of materials (BOM).
Our Quality Assurance Process
At Konmask.com, every industrial automation component goes through a structured quality workflow before it reaches your facility:
- Visual Inspection: Check for physical damage, corrosion, bent pins, and component integrity.
- Functional Testing: Where applicable, modules are bench-tested against known-good reference systems.
- Traceability Documentation: Each unit is logged with source traceability and test records.
- Anti-Static Packaging: All cards are shipped in ESD-safe bags with foam cushioning and double-box protection.
- 90-Day Warranty: We stand behind every part we supply with a 90-day replacement warranty against defects.
How to Order
- Submit an inquiry via the “Request a Quote” button on this page, or email support@konmask.com.
- Provide your required quantity, preferred condition (new surplus / refurbished), and any urgency requirements.
- Our team will respond within 24 business hours with availability, lead time, and pricing.
- Upon agreement, we issue a proforma invoice and arrange shipment via your preferred freight method (DHL, FedEx, sea freight, etc.).
- Tracking information and test documentation are provided at time of dispatch.
Why Choose Konmask.com?
- Specialist Focus: We exclusively source and supply industrial automation components — DCS, PLC, drives, and instrumentation — not a general electronics distributor.
- Global Reach: We ship to over 60 countries, with experience navigating export documentation, customs requirements, and international freight logistics.
- Obsolescence Expertise: Many TDC 3000 components are discontinued by Honeywell. We maintain an active network of verified suppliers to source hard-to-find parts.
- Technical Support: Our team includes engineers with hands-on DCS experience who can assist with part identification, compatibility checks, and installation guidance.
- Transparent Process: No hidden fees. Clear lead times. Honest condition reporting.
Frequently Asked Questions
Q: Is the Honeywell 51303976-400 still in production?
A: The TDC 3000 platform is in its extended lifecycle phase. Honeywell no longer actively manufactures all variants. Konmask.com sources new surplus and professionally refurbished units to support ongoing plant operations.
Q: Can this card be used as a direct replacement without system reconfiguration?
A: In most cases, yes — the 51303976-400 is a form-fit-function replacement. However, we recommend verifying your system’s firmware revision and cabinet slot assignment with your DCS engineer before installation.
Q: What is the lead time for this part?
A: Lead time varies by stock availability. In-stock units typically ship within 3–5 business days. For out-of-stock situations, sourcing typically takes 2–4 weeks. Contact us for current availability.
Q: Do you provide a warranty?
A: Yes. All units supplied by Konmask.com carry a 90-day warranty against functional defects. Extended warranty options are available upon request.
Q: Can you supply multiple units for a plant-wide spare parts program?
A: Absolutely. We regularly fulfill bulk orders for maintenance, repair, and operations (MRO) spare parts programs. Contact us to discuss volume pricing and stocking agreements.
Q: What shipping methods are available?
A: We support DHL Express, FedEx International, UPS, air freight, and sea freight. We can also work with your nominated freight forwarder.
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