Honeywell MC-TAMT04 Thermocouple Input Terminal Board – Experion PKS Series
When a thermocouple input terminal board fails in a distributed control system, the consequences extend far beyond a single lost signal. Temperature readings across an entire process loop go blind — reactors overheat, distillation columns lose separation control, and safety interlocks trip on bad data. In refinery and chemical plant environments, an unplanned shutdown triggered by a faulty I/O termination board can cost tens of thousands of dollars per hour. The MC-TAMT04 exists precisely to prevent that scenario: it is the certified, field-proven termination point between your thermocouple field wiring and the Honeywell Experion PKS control system.
Within the Experion PKS I/O architecture, the MC-TAMT04 (part number 51305890-175) occupies a specific and non-substitutable role. It is the dedicated thermocouple termination assembly designed to work with the MC-TAIX thermocouple input module, providing cold-junction compensation at the terminal block level — a design choice that eliminates the measurement error introduced when thermocouple extension wire is terminated at a remote junction. This board is deployed across Honeywell’s C300 controller-based systems in upstream oil and gas, LNG processing, power generation, and specialty chemical manufacturing worldwide.
Technical Specifications
Electrical
- Compatible Input Module: MC-TAIX Thermocouple Input Module
- Thermocouple Types Supported: B, E, J, K, N, R, S, T (per IEC 60584 / ANSI MC96.1)
- Cold Junction Compensation: Integrated isothermal terminal block
- Channel Count: 4 thermocouple input channels per board
- Signal Wiring: Individual screw-terminal connections per channel, suitable for thermocouple-grade extension wire
Mechanical
- Part Number: MC-TAMT04
- Alternate Part Number: 51305890-175
- Form Factor: DIN-rail mountable terminal board assembly
- Weight: 850 g
- Connector Interface: Mates directly with MC-TAIX module via keyed ribbon connector
Environmental
- Operating Temperature: 0°C to 60°C (32°F to 140°F)
- Storage Temperature: -40°C to 85°C
- Relative Humidity: 5% to 95% non-condensing
- Pollution Degree: 2 (IEC 60664-1)
Certifications & Standards
- Designed and tested to Honeywell Experion PKS system qualification standards
- Thermocouple linearization per IEC 60584-1
- CE marking applicable per Honeywell system-level declaration
Note: All specifications are based on Honeywell published documentation. Verify compatibility against your specific system revision before installation.
Key Features & Benefits
- Integrated Cold Junction Compensation — Isothermal terminal block design holds all termination points at a uniform reference temperature, reducing CJC error to <0.5°C across the full operating range, directly improving process temperature accuracy.
- 4-Channel Dedicated Architecture — Each of the four channels is electrically isolated at the termination stage, preventing ground loops between field instruments from corrupting adjacent channel readings — a common failure mode in shared-terminal designs.
- Direct Plug-In Compatibility with MC-TAIX — Keyed ribbon connector eliminates mis-wiring risk during replacement; a technician can swap the board in under 10 minutes without re-terminating field wiring, minimizing maintenance window duration.
- Multi-Thermocouple Type Support — Supports all eight IEC 60584 standard thermocouple types (B, E, J, K, N, R, S, T), allowing a single spare board to cover diverse process measurement points across a facility.
- Screw-Terminal Field Wiring — Individual, clearly labeled screw terminals per channel accept thermocouple extension wire directly, eliminating the need for intermediate junction boxes and reducing potential signal degradation points.
- Experion PKS System Qualification — Manufactured and tested to Honeywell’s system-level qualification requirements, ensuring the board does not introduce unvalidated variables into a safety-instrumented or regulatory-compliant control loop.
Industry & Equipment Applications
- Oil & Gas Refining — Crude distillation unit (CDU) temperature profiling, fired heater tube skin temperature monitoring, and hydrocracker reactor bed temperature measurement where thermocouple accuracy directly governs yield and safety.
- LNG & Gas Processing — Cryogenic heat exchanger temperature monitoring and compressor bearing temperature surveillance in facilities running Honeywell Experion PKS as the primary DCS platform.
- Power Generation — Steam turbine exhaust temperature measurement, boiler superheater outlet monitoring, and gas turbine combustion zone temperature acquisition in combined-cycle power plants.
- Specialty Chemical Manufacturing — Reactor jacket temperature control, distillation column tray temperature profiling, and exothermic reaction monitoring where tight temperature control is a product quality requirement.
- Pulp & Paper — Recovery boiler temperature measurement and digester process temperature monitoring in mills operating Honeywell DCS infrastructure.
- Pharmaceutical & Fine Chemical — Validated temperature measurement loops in GMP manufacturing environments where instrument traceability and system qualification documentation are regulatory requirements.
System Integration & Compatible Parts
Upstream (Field Side): Thermocouple sensors (Types B/E/J/K/N/R/S/T) with thermocouple-grade extension wire terminated directly to the MC-TAMT04 screw terminals.
Downstream (System Side): MC-TAIX Thermocouple Input Module → C300 Controller (or compatible Experion PKS controller) → Experion PKS Server.
Associated Accessories: MC-TAIX input module, Experion PKS I/O Link cable, DIN rail mounting hardware.
Equivalent / Replacement Consideration: The 51305890-175 is the manufacturer’s alternate part number for MC-TAMT04 — both designations refer to the same assembly. No third-party equivalent is qualified for use within a Honeywell Experion PKS system without re-validation. Substitution with non-OEM terminal boards voids system qualification and may affect SIL-rated loops.
Our Quality Assurance Process
- Visual & Mechanical Inspection — Each unit is inspected for PCB integrity, connector pin condition, terminal block seating, and label legibility against Honeywell’s published hardware revision documentation.
- Functional Verification — Where test equipment permits, connector continuity and terminal resistance are verified to confirm no open circuits or intermittent contacts exist prior to shipment.
- Packaging Inspection — Units are packed in anti-static bags with foam cushioning inside double-wall cartons. Humidity indicator cards are included for long-distance shipments.
- Documentation Review — Shipment is accompanied by a packing list confirming part number, revision, and quantity. Upon request, we can provide: original manufacturer label photographs, test records (where available), and a certificate of conformance.
Available Documentation: Packing list · Part number confirmation · Manufacturer label photos · Certificate of conformance (on request) · Test records (where available)
How to Order
- Submit Your Inquiry — Contact us via the form on this page or email support@konmask.com with your required part number (MC-TAMT04 / 51305890-175), quantity, and destination country.
- Receive Quotation — Our team will respond within 24 hours with availability, lead time, and a formal quotation including shipping options to your location.
- Confirm & Ship — Upon order confirmation, we arrange export documentation, packaging, and dispatch. Tracking information is provided upon shipment.
📞 +0086 19859288691 | ✉ support@konmask.com
Why Choose Konmask.com?
- Specialist Focus on Industrial Automation — We source and supply DCS, PLC, and process control components exclusively, which means our team understands the technical context of every part we handle — not just the part number.
- Verified Part Authenticity — Every unit we ship is inspected against manufacturer documentation. We do not list parts we cannot physically verify.
- Responsive B2B Service — Inquiries receive a substantive response within 24 hours, including availability confirmation and lead time — not an automated acknowledgment.
- Export Experience — We handle export documentation, customs declarations, and international freight coordination for customers across Asia, the Middle East, Europe, and the Americas.
- Long-Term Supply Relationships — Many of our customers return for repeat orders across multiple projects. We maintain records of your previous purchases to streamline future procurement.
Frequently Asked Questions
Q: Is the Honeywell MC-TAMT04 compatible with all Experion PKS controller revisions?
A: The MC-TAMT04 terminal board is designed for use with the MC-TAIX thermocouple input module within the Experion PKS I/O subsystem. Compatibility with specific controller revisions depends on your system’s I/O link configuration. We recommend confirming your system’s hardware revision against Honeywell’s compatibility matrix, or contacting us with your system details for guidance before ordering.
Q: Can I use the MC-TAMT04 51305890-175 as a direct replacement for a failed thermocouple terminal board without reconfiguring the DCS?
A: In most cases, yes — the MC-TAMT04 is a passive termination assembly. Replacing a like-for-like board of the same revision typically does not require DCS reconfiguration, as the channel mapping and signal conditioning reside in the MC-TAIX input module. However, always verify the hardware revision matches your existing installation and follow your site’s management-of-change procedure.
Q: What is the lead time for the Honeywell MC-TAMT04 and do you ship internationally?
A: Lead time depends on current stock availability, which we confirm within 24 hours of receiving your inquiry. We ship internationally to most destinations and handle all export documentation. Contact us at support@konmask.com or +0086 19859288691 with your destination country for a shipping estimate.
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Contact: support@konmask.com | +0086 19859288691
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