Product Introduction

51309213‑125 (MC-TAMT12) is a 16-channel low-level analog input multiplexer (LLMUX FTA) for the Honeywell Experion PKS / TDC 3000 / TPS DCS system, specifically designed to collect low-level signals such as thermocouples (TC), resistance thermometers (RTD), and micro-voltage levels in millivolts. It isolates, amplifies, and multiplexes multiple weak signals before sending them to IOP cards, serving as the core I/O board for precise temperature and weak signal acquisition.

Model Interpretation

51309213‑125: Honeywell part number (51309213 = LLMUX series, 125 = Standard Version / 16 channels)

MC-TAMT12: Module model

MC = Module Card (Standard I/O board)

TAMT = Thermocouple Analog Multiplexer (Thermocouple Analog Multiplexer)

12 = Hardware version (Rev.12, Industrial Standard Version) Technical Specifications

Channel quantity: 16 differential inputs (configurable as 8 RTD or 16 TC/mV)

Signal type: Thermocouple (B/E/J/K/N/R/S/T types), Thermoresistor (PT100/PT1000), ±50mV/±100mV low-level voltage

Resolution: 16 bits (high-precision analog-to-digital conversion)

Isolation strength: 1500V RMS (channel - system isolation, anti-ground loop interference)

Input impedance: >10MΩ (mV signal), >100kΩ (RTD)

Cold junction compensation (CJR): On-board high-precision CJR, accuracy ±0.5°C

Power supply: 24VDC (±10%), powered by UCN backplane

Operating temperature: 0°C ~ +60°C (standard industrial grade)

Storage temperature: -40°C ~ +85°C

Humidity: 5% ~ 95% RH (no condensation)

Size: 220 × 150 × 30 mm

Weight: 0.75 kg

Certifications: CE, UL, CSA (industrial safety certification)

Interfaces and Communications

Field side: 16 gold-plated screw terminals (anti-oxidation, compatible with TC/RTD/mV signal wiring)

System side: High-density UCN flat cable (connected to LLMUX IOP card)

Status indicators: PWR (power), READY (ready), FAULT (fault) LED indicators

Configuration: Configure channel type, range, filtering parameters through DCS system software

Hot-swappable: Supported (online replacement does not affect system operation) Core function

Multi-channel low-level signal acquisition: 16 differential inputs, compatible with TC/RTD/mV signals, suitable for industrial precise temperature and weak pressure/flow signal acquisition

Signal isolation and anti-interference: 1500V RMS electrical isolation, suppressing industrial environment ground loops and electromagnetic interference, ensuring the measurement accuracy of weak signals

High-precision cold-end compensation: On-board CJR, automatically compensating for the temperature error of thermocouples at the cold end, with temperature measurement accuracy reaching ±0.5°C

Signal amplification and multiplexing: Amplifying mV-level weak signals to the range that can be recognized by IOP, 16-channel time-division multiplexing, reducing the number of system I/O points

Fault diagnosis and alarm: Open circuit / short circuit detection, over-range alarm, power failure monitoring, indicator lights intuitively indicating the fault status Applicable scenarios

Industry: Petrochemicals, power (boilers / steam turbines), metallurgy, pharmaceuticals, food processing

Applications: 16-channel thermocouple temperature monitoring, RTD high-precision temperature measurement, collection of tiny voltage signals (such as strain bridges, pressure sensors)

Compatible systems: Experion PKS (C200/C300), TDC 3000, TPS (UCN network LLMUX IOP companion)