Thermocouple Multiplexer Solution – Honeywell MC-TAMT03 51309223-175 | Experion PKS Series
In large-scale process plants — refineries, chemical complexes, and power generation facilities — temperature monitoring is not optional. A single reactor vessel may require 32 to 64 discrete thermocouple inputs, each mapped to a unique process zone. Traditional single-channel I/O architectures demand proportional cabinet space, wiring runs, and marshalling hardware: a 64-point temperature loop can consume 8 or more conventional I/O cards, 200+ terminal connections, and up to 40% of total panel real estate. Unplanned thermocouple failures in these environments cause unscheduled shutdowns that cost operators an average of USD $87,000 per hour in lost production.
The Honeywell MC-TAMT03 (Part No. 51309223-175) Multiplexer Thermocouple module resolves this at the hardware level. By consolidating multiple thermocouple inputs onto a single multiplexed I/O card within the Experion PKS C300 / EPKS architecture, it reduces wiring density by up to 75%, eliminates redundant marshalling layers, and delivers cold-junction-compensated temperature data directly to the DCS historian — all within a single module footprint. Engineers specify this part when accuracy, channel density, and system integration cannot be compromised.
Where This Product Is Used
Oil & Gas Refining
- Crude distillation unit (CDU) tray temperature profiling — 32-channel monitoring across column trays operating at 340–380 °C, ambient cabinet temperature up to 55 °C, IEC 61511 SIL 2 loop integrity required
- Hydrotreater reactor bed temperature mapping — multi-zone exotherm detection with ±1 °C resolution, H₂S-rated enclosure environments
- Fired heater tube skin temperature monitoring — continuous duty at 600 °C+ process temperatures, API 560 compliance
Chemical & Petrochemical
- Ethylene cracker furnace coil temperature scanning — high-density thermocouple arrays, 10 ms scan cycle, ATEX Zone 1 field wiring
- Polymerization reactor jacket temperature control — multi-zone differential temperature measurement, FDA 21 CFR Part 11 data integrity
- Distillation column temperature gradient profiling — 16–48 points per column, NAMUR NE 107 diagnostics integration
Power Generation
- Steam turbine bearing and casing temperature monitoring — IEC 60034 compliance, vibration-rated mounting, 24/7 continuous operation
- Boiler superheater outlet temperature scanning — ASME PTC 4 performance testing data acquisition, Type K/J/T thermocouple compatibility
- Gas turbine exhaust temperature spread monitoring — 16-point EGT arrays, NERC CIP cybersecurity-compliant DCS integration
Pulp & Paper
- Recovery boiler smelt spout temperature monitoring — corrosive atmosphere, IP65 field junction boxes, TAPPI TIP 0416-14 guidance
- Digester temperature zone profiling — multi-point Kraft process control, FDA-compliant historian logging
- Dryer section felt temperature scanning — high-humidity environment, 85% RH rated cabinet installation
Pharmaceutical & Life Sciences
- Autoclave sterilization cycle temperature validation — 21 CFR Part 11 audit trail, ±0.5 °C calibration traceability to NIST
- Lyophilizer shelf temperature mapping — cryogenic range down to −60 °C, GMP-compliant data acquisition
- Bioreactor temperature uniformity monitoring — multi-zone fermentation control, GAMP 5 validation documentation support
Metals & Mining
- Electric arc furnace (EAF) electrode temperature monitoring — high-EMI environment, shielded thermocouple wiring, IEC 61000-4 immunity
- Continuous casting mold temperature profiling — real-time solidification front tracking, ISO 9001 process control
- Smelter off-gas temperature measurement — dusty, corrosive atmosphere, IP54 minimum enclosure rating
Technical Specifications
| Part Number | MC-TAMT03 / 51309223-175 |
| Manufacturer | Honeywell Process Solutions |
| Series | Experion PKS / EPKS C300 I/O |
| Module Type | Multiplexer Thermocouple Input |
| Input Channels | Multi-channel multiplexed (application-dependent) — enables high-density temperature I/O in a single slot |
| Thermocouple Types Supported | Type J, K, T, E, R, S, B (IEC 60584 / ASTM E230 compliant) |
| Cold Junction Compensation | Automatic, hardware-based — eliminates manual CJC correction in field wiring |
| Measurement Accuracy | ±1 °C typical (Type K, 0–1000 °C range) — critical for reactor bed differential temperature alarms |
| Input Impedance | High impedance — compatible with standard mineral-insulated (MI) thermocouple cables |
| Power Supply | Supplied via Experion PKS I/O bus — no external field power required |
| Communication | Experion PKS FTE (Fault Tolerant Ethernet) backplane — deterministic scan, redundancy-ready |
| Operating Temperature | 0 °C to +60 °C (cabinet installation) — suitable for tropical and desert plant environments |
| Humidity | 5–95% RH non-condensing |
| Mounting | Experion PKS I/O chassis (standard C300 rack) — hot-swap capable for zero-downtime replacement |
| Weight | 750 g |
| Firmware | Compatible with Experion PKS R400 and above |
| Certifications | CE, UL, FM, ATEX (system-level), IEC 61511 SIL 2 capable |
Why Engineers Specify This Model
- In crude distillation column temperature profiling, the MC-TAMT03 delivers 32+ channel density in a single I/O slot because its multiplexed architecture eliminates the need for individual channel cards, meeting API RP 554 panel space optimization requirements.
- In SIL 2 safety instrumented systems, the MC-TAMT03 delivers hardware-based cold junction compensation because software CJC correction introduces latency incompatible with IEC 61511 proof-test intervals, meeting functional safety loop integrity requirements.
- In continuous process plants requiring zero-downtime maintenance, the MC-TAMT03 delivers hot-swap module replacement because it integrates with Experion PKS redundant I/O architecture, meeting 99.99% availability SLA requirements.
- In high-EMI environments such as EAF steelmaking, the MC-TAMT03 delivers shielded differential input measurement because its input circuit rejects common-mode noise up to IEC 61000-4-5 surge levels, meeting industrial EMC immunity requirements.
- In pharmaceutical GMP facilities, the MC-TAMT03 delivers NIST-traceable calibration data because Honeywell’s factory calibration certificates are issued per ISO/IEC 17025, meeting FDA 21 CFR Part 11 validation documentation requirements.
- In remote FPSO and offshore platforms, the MC-TAMT03 delivers compact multi-channel I/O because its reduced wiring footprint cuts cable tray weight by up to 60 kg per 64-point loop, meeting offshore weight and space budget requirements.
Complete System Bill of Materials
- MC-TAMT03 (51309223-175) — This module. Multiplexer thermocouple input card; primary temperature data acquisition component.
- Experion PKS C300 Controller — Host controller; processes temperature data from this module via FTE backplane communication.
- CC-TAIX01 / CC-TAIX11 I/O Chassis — Mounting rack; provides power bus and backplane connectivity for MC-TAMT03 installation.
- MC-TAIH02 / MC-TAIH12 I/O Link Interface — Communication bridge; connects I/O chassis to C300 controller over redundant FTE network.
- Thermocouple Extension Cable (Type K, MI) — Field wiring; mineral-insulated shielded cable from process sensor to module terminal block, IEC 60584 color-coded.
- MC-TERM Series Terminal Blocks — Field termination; screw or spring-clamp terminals for thermocouple pair connections at module input.
- Experion PKS Power Supply (MC-PDPY1) — Cabinet power; 24 VDC bus supply for I/O chassis, redundant configuration recommended for SIL loops.
- Experion PKS FTE Network Switch — Network infrastructure; managed industrial Ethernet switch for FTE redundant ring topology.
- Honeywell Experion Station (EWS/OWS) — HMI/SCADA; operator workstation for real-time temperature trend display and alarm management.
Compliance & Industry Standards
- CE Marking — Issued by Honeywell under EU Machinery Directive 2006/42/EC and EMC Directive 2014/30/EU. Confirms product conformity for sale and installation within the European Economic Area.
- UL Listed — Underwriters Laboratories (UL 508A). Required for panel builders supplying North American industrial control panels; confirms electrical safety under NFPA 79.
- FM Approved — Factory Mutual Global. Confirms suitability for use in hazardous (classified) locations per NFPA 70 Article 500; required by many US refinery and chemical plant specifications.
- IEC 61511 SIL 2 Capable — Functional safety standard for process industry safety instrumented systems. Confirms the module can be used in SIL 2 safety loops when installed per Honeywell’s Safety Manual; required by insurers and HSE regulators.
- IEC 60584 — International thermocouple type and tolerance standard. Confirms measurement accuracy claims are traceable to internationally recognized calibration references.
- RoHS Compliant — EU Directive 2011/65/EU. Confirms restriction of hazardous substances; required for EU procurement and ESG compliance reporting.
Quality Assurance & Sourcing
Konmask.com sources the MC-TAMT03 exclusively through authorized Honeywell distribution channels and verified surplus asset recovery networks with documented chain of custody. Every unit undergoes a 4-step inspection protocol before dispatch:
- Visual & Physical Inspection — Enclosure integrity, connector pin condition, label legibility, and firmware revision verification against Honeywell’s published part matrix.
- Functional Bench Test — Module powered in Experion PKS test chassis; channel scan verified, CJC output confirmed within ±1 °C of reference standard.
- Calibration Verification — Input accuracy cross-checked against NIST-traceable reference thermocouple simulator across full operating range.
- Documentation Package Assembly — Factory calibration certificate, test report, and packing list compiled and included with shipment.
Available documentation on request: Factory Calibration Certificate · Honeywell Material Declaration · Test Report · Certificate of Conformance · Export Control Classification (ECCN).
How to Source This Part
- Submit Your Inquiry — Contact us via the product page, email support@konmask.com, or call +0086 19859288691 with your part number (MC-TAMT03 / 51309223-175), required quantity, and delivery timeline.
- Receive Quotation — Our technical team responds within 24 hours with pricing, lead time, available stock status, and documentation package details.
- Order & Ship — Orders confirmed before 14:00 CST ship same business day. Global freight via DHL Express, FedEx International Priority, or sea freight for bulk orders. Export documentation (commercial invoice, packing list, COO) included as standard.
Application-Specific FAQ
Q: Can the MC-TAMT03 be used in a SIL 2 safety instrumented system for reactor high-temperature shutdown?
A: Yes. The MC-TAMT03 is IEC 61511 SIL 2 capable when installed and maintained per Honeywell’s published Safety Manual (document 51-52-25-66). For SIL loop applications, a proof-test interval and diagnostic coverage calculation must be completed by the SIS engineer using Honeywell’s FMEDA data. We can provide the Safety Manual and FMEDA report upon request.
Q: How many thermocouple inputs can the MC-TAMT03 handle in a single Experion PKS I/O chassis slot?
A: The MC-TAMT03 uses a multiplexed input architecture that consolidates multiple thermocouple channels into a single chassis slot, significantly reducing the I/O card count compared to single-channel alternatives. The exact channel count per slot is defined in the Experion PKS I/O hardware specification; contact us for the current datasheet applicable to your firmware revision.
Q: Is the MC-TAMT03 compatible with Experion PKS R500 and later firmware revisions used in refinery DCS upgrade projects?
A: Compatibility depends on the specific Experion PKS release and C300 controller firmware. The MC-TAMT03 is qualified for Experion PKS R400 and above; for R500+ upgrade projects, we recommend confirming the firmware compatibility matrix with Honeywell’s TPS/EPKS migration team. We supply units with documented firmware revision labels and can assist with pre-shipment compatibility verification.
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