Model Explanation

51309218-125: Honeywell Material Number (51309218 = RTD-specific LLMUX series, 125 = 16-channel standard version)

MC-TAMR12: Module Model

MC = Module Card (Standard I/O Board Card)

TAMR = Thermocouple Analog Multiplexer RTD (Thermocouple Analog Multiplexer for RTD)

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

Channel quantity: 16 differential inputs (only supports RTD, no TC/mV function)

Signal type: Thermal resistance (PT100/PT1000, 3-wire / 4-wire configuration)

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

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

Input impedance: >100kΩ (RTD dedicated)

Cold junction compensation (CJR): None (pure RTD measurement, no need for CJR)

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)

Dimensions: 220 × 150 × 30 mm

Weight: 1.13 kg

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

Interfaces and Communications

Field side: 16 gold-plated screw terminals (3-wire / 4-wire RTD dedicated 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 RTD type, wiring configuration, range, filtering parameters through DCS software

Hot-swappable: Supported (can be replaced online without affecting system operation) Core function

16-channel pure RTD high-precision acquisition: Specifically designed for PT100/PT1000, compatible with 3-wire/4-wire systems, with temperature measurement accuracy up to ±0.1°C

Specialized signal conditioning: Optimized for RTD resistance-temperature characteristics, linearization calibration, and suppression of lead resistance errors

Electrical isolation anti-interference: 1500V RMS isolation, compatible with industrial strong electromagnetic environments, ensuring stable weak resistance signals

Fault diagnosis and alarm: RTD open circuit / short circuit detection, over-range alarm, power supply failure monitoring

Rational and efficient design: No TC circuit, lower cost, lower power consumption, suitable for dense pure temperature measurement points in small and medium-sized DCS systems

Application scenarios

Industry: Petrochemicals, power, metallurgy, pharmaceuticals, food processing

Application: 16-channel RTD high-precision temperature monitoring, reaction vessels / pipelines / equipment surface temperature measurement, dense pure temperature measurement points in small and medium-sized DCS systems

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