Model Definition

51401491-150: Honeywell standard part number

51401491: Series code for low‑level analog multiplexer modules

150: Hardware revision G/E, upgraded firmware, conformal coated, industrial temp range

Module Type: Low‑Level Analog Input Multiplexer (LLMux)

Applicable System: Honeywell TDC 3000, TPS (LCN/UCN nodes), Experion PKS

Alias: MC‑TAMT02 (vs. MU‑TAMT02 for 51401491-100)

Technical Specifications

Input Channels: 16 differential low‑level analog inputs (thermocouple, mV)

Signal Types: Thermocouple (J, K, T, E, N, R, S, B), ±100 mV millivolt

Resolution: 16‑bit ADC, accuracy ±0.02% FS

Filtering: 2 Hz programmable low‑pass filter, built‑in noise rejection

Isolation: 2500 VAC channel‑to‑backplane galvanic isolation

Power Supply: 24 VDC (±10%), ≤200 mA

Operating Temperature: ‑20°C to +70°C (wider than 51401491-100)

Storage Temperature: ‑40°C to +85°C

Humidity: 5%–95% RH (non‑condensing)

Coating: Conformal coated for corrosion/moisture resistance

Dimensions: 307 mm × 100 mm × 45 mm (Size B)

Weight: Approx. 1.2 kg

Certifications: CE, UL, CSA, RoHS, FM compliant

Interfaces & Configuration

Field Interface: Screw terminals for thermocouple/mV signal wiring

Backplane Interface: Gold‑finger connector for system power and communication

Configuration: Onboard DIP switches for channel enable, filter frequency, TC type, and fault response

Redundancy: Supports 1:1 hot standby with auto failover

Diagnostics: LED indicators for power, channel status, fault, and communication; onboard self‑diagnostics

Key Functions

16‑Channel Low‑Level Signal Multiplexing: Gathers weak thermocouple/mV signals and routes to controller.

Precision Signal Conditioning: Amplifies, filters, and isolates low‑level signals for accuracy and noise immunity.

Multi‑TC Support: Handles 8 thermocouple types with cold‑junction compensation (CJC).

High‑Speed Conversion: 16‑bit ADC converts analog to digital for reliable backplane transmission.

Enhanced Reliability: Conformal coating and wider temp range for harsh environments.

Fault Detection: Monitors open/short circuits and out‑of‑range signals; reports to DCS.

Application Scenarios

Systems: Honeywell TDC 3000, TPS, Experion PKS

Industries: Petrochemical, power generation, metallurgy, pharmaceutical, pulp & paper

Applications: Temperature monitoring, thermocouple data acquisition, low‑level mV logging, process loop control

Mounting: Standard 19‑inch I/O cabinet, Honeywell TDC 3000 I/O racks

Differences from 51401491-100

Part Number: 51401491-150 (MC‑TAMT02) vs. 51401491-100 (MU‑TAMT02)

Temperature Range: ‑20°C to +70°C vs. 0°C to +60°C

Coating: Conformal coated vs. non‑coated

Firmware: Upgraded, more robust for industrial use

Reliability: Higher tolerance to moisture, dust, and temperature swings