Honeywell 51307687-176 / 51307686-106 PM-AI Motherboard | Replacement, Equivalent & Selection Guide
The Honeywell 51307687-176 (assembly part) and its associated board-level reference 51307686-106 form the PM-AI (Process Manager Analog Input) Motherboard used in Honeywell’s TDC 3000 and TPS (TotalPlant Solution) Distributed Control Systems. This motherboard serves as the central backplane intelligence for analog input signal conditioning and communication within the PM cabinet. When this board fails or becomes unavailable, entire process loops go offline — triggering unplanned shutdowns, loss of sensor visibility, and costly production interruptions in refineries, chemical plants, and power generation facilities. Sourcing a verified replacement quickly is not optional; it is operationally critical.
Within the TDC 3000 / TPS architecture, the PM-AI Motherboard occupies a foundational role: it interfaces directly with field-mounted transmitters, routes 4–20 mA analog signals to the High-Performance Process Manager (HPPM) or Basic Process Manager (BPM), and maintains the hardware handshake required for UCN (Universal Control Network) communication. The 51307687-176 assembly is a mature, field-proven component with a global installed base spanning decades of continuous operation across heavy industry.
Technical Specifications
- Part Number (Assembly): 51307687-176
- Board Reference: 51307686-106
- Module Type: PM-AI (Process Manager Analog Input) Motherboard
- Compatible Platform: Honeywell TDC 3000, TPS (TotalPlant Solution)
- Signal Type: Analog Input (4–20 mA, thermocouple, RTD — per slot card configuration)
- Communication Bus: UCN (Universal Control Network) / LCN (Local Control Network)
- Form Factor: Rack-mount motherboard for PM cabinet
- Weight: Approx. 3,300 g (as shipped)
- Condition Available: New surplus, refurbished, tested
Note: Konmask.com does not fabricate or alter specifications. All parameters above are based on Honeywell’s published documentation and field-verified data. Contact us to confirm compatibility with your specific system revision.
Compatible Replacement & Equivalent Models
When sourcing a replacement for the 51307687-176 / 51307686-106, the following models and assemblies are commonly evaluated:
- 51307687-176 – Primary assembly part number (this listing)
- 51307686-106 – Board-level sub-reference, often cross-referenced in repair documentation
- 51307687-175 / 51307687-177 – Adjacent revision levels; verify firmware and hardware revision compatibility before substitution
- 51304485-xxx series – Earlier PM-AI board generations; may require slot card re-configuration
- Third-party remanufactured equivalents – Available through certified repair houses; Konmask.com can advise on tested alternatives upon request
Important: Always verify the hardware revision suffix and firmware version against your PM cabinet’s existing configuration before installing any replacement board. Mismatched revisions can cause initialization failures on the UCN.
Why Choose the Original Model
- Guaranteed pin-for-pin compatibility with existing TDC 3000 / TPS PM cabinets — no re-wiring or re-configuration required
- Validated UCN handshake — the original Honeywell firmware ensures seamless re-integration into the LCN/UCN network without re-engineering
- Decades of field reliability — the 51307687-176 has an established MTBF record in continuous 24/7 process environments
- Regulatory compliance — original OEM parts support SIL-rated loop documentation and functional safety audits
- Reduced commissioning risk — swap-in replacement minimizes downtime versus re-engineering with a non-OEM alternative
Typical Applications
- Oil & gas refining — crude distillation unit (CDU) and hydrocracker process control
- Petrochemical plants — ethylene cracker and polymer reactor analog loop management
- Power generation — boiler control and turbine analog input monitoring
- Pulp & paper — digester and recovery boiler DCS analog I/O
- Pharmaceutical manufacturing — batch process analog signal acquisition
- Water treatment — SCADA-integrated DCS analog input for flow and level loops
System Compatibility
- Primary Platform: Honeywell TDC 3000 (all generations), TPS
- Process Manager Types: HPPM (High-Performance Process Manager), BPM (Basic Process Manager)
- Network: UCN (Universal Control Network), LCN (Local Control Network)
- Slot Cards: Compatible with standard TDC 3000 analog input slot cards (verify card revision)
- Not compatible with: Honeywell Experion PKS (C300/EPKS) — different hardware architecture
Selection Guide
Use the following decision framework when selecting a replacement PM-AI Motherboard:
- Step 1 – Confirm part number: Locate the label on the existing board. Note both the assembly number (51307687-xxx) and the board reference (51307686-xxx) including the revision suffix.
- Step 2 – Check system revision: Identify your PM cabinet’s hardware generation (R100, R110, R120, etc.) from the system documentation or Honeywell service records.
- Step 3 – Verify firmware: Confirm the firmware revision loaded on the existing HPPM/BPM. Some board revisions require specific firmware versions for proper initialization.
- Step 4 – Evaluate condition: For critical loops, specify new surplus or factory-refurbished with test report. For non-critical or backup spares, tested used boards are cost-effective.
- Step 5 – Contact Konmask.com: Provide your part number, revision, and system details. We will confirm availability, condition, and lead time before you commit to an order.
Quality Assurance & Sourcing
- All boards are inspected upon receipt and prior to shipment
- Functional test performed on Honeywell-compatible test rigs where applicable
- Anti-static packaging and climate-controlled storage
- Traceability documentation available upon request
- Sourced from decommissioned plant upgrades, authorized distributors, and certified repair facilities
- No counterfeit parts — Konmask.com operates a strict supplier qualification process
How to Order
- Submit an inquiry via [email protected] or the on-page contact form
- Provide: part number (51307687-176 and/or 51307686-106), required quantity, condition preference, and delivery timeline
- Receive a formal quotation with availability, condition report, and lead time within 1 business day
- Confirm order — we arrange secure export packaging and international logistics
- Track shipment with full documentation (commercial invoice, packing list, test report if applicable)
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Replacement & Compatibility FAQ
Q: Can 51307686-106 be used as a direct replacement for 51307687-176?
A: The 51307686-106 is the board-level reference number for the assembly 51307687-176. They refer to the same physical component at different documentation levels. Always order by the assembly number (51307687-176) for procurement purposes.
Q: Is the 51307687-175 a compatible substitute for the -176 revision?
A: Adjacent revisions may be functionally compatible, but Honeywell revision changes can include firmware, component, or connector modifications. Contact Konmask.com with your system details for a confirmed compatibility assessment before substituting revisions.
Q: Can this board be used in an Experion PKS system?
A: No. The TDC 3000 / TPS PM-AI Motherboard architecture is not compatible with Experion PKS (C300 or EPKS controllers). These are distinct hardware platforms.
Q: Do you offer repair services for a failed 51307687-176?
A: Konmask.com can connect you with certified Honeywell DCS repair facilities. Contact us with your board’s failure symptoms and we will advise on repair vs. replacement economics.
Q: What is the typical lead time for this part?
A: Lead time depends on current stock and condition required. New surplus units typically ship within 3–7 business days. Refurbished units may require 5–10 business days for testing and preparation. Contact us for a real-time availability check.
Q: Do you ship internationally?
A: Yes. Konmask.com ships globally with full export documentation. We have experience with customs requirements for industrial automation components across Asia, Europe, the Middle East, and the Americas.
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Contact: [email protected] | +0086 19859288691
