Emerson KJ3002X1-BG2 DeltaV 8-Channel Thermocouple and mV Analog Input Module

1. Product Overview

The KJ3002X1-BG2 (alternative part number: 12P1731X032) is a high-precision multi-functional analog input module engineered for Emerson DeltaV distributed control systems. Different from conventional discrete and fixed-type signal acquisition cards, this module is specially designed for industrial high-temperature and micro-voltage signal measurement, supporting both thermocouple temperature detection and mV-level weak signal collection. With built-in HART communication compatibility and multi-type thermocouple curve adaptation, it delivers stable, repeatable and high-accuracy process data acquisition. Optimized for thermal process monitoring in harsh industrial environments, it serves as a core temperature and micro-signal acquisition unit for petrochemical, thermal power, metallurgy and energy process control systems.

2. Core Product Features

1. Dual-mode Thermocouple & mV Signal Acquisition Supporting dual signal input modes, the module collects standard industrial thermocouple temperature signals and low-level millivolt analog signals. It is compatible with J, K, T, E, R, S, B and other mainstream thermocouple types, covering ultra-wide industrial temperature ranges. The flexible dual-mode design eliminates the need for multiple dedicated acquisition cards, simplifying on-site I/O configuration and reducing spare parts inventory pressure.

2. High-precision Temperature Conversion & Linear Calibration Adopting professional high-resolution conversion algorithm, the module provides full-scale measurement accuracy up to ±0.5% FS. Built-in standard thermocouple nonlinear correction and automatic cold junction compensation effectively eliminate ambient temperature drift errors. It ensures consistent and precise temperature tracking even during long-term continuous thermal process operation, improving the stability of furnace and reactor temperature closed-loop control.

3. Native HART Protocol Compatibility Integrated HART communication function enables two-way data interaction with smart field instruments. Operators can remotely view sensor status, diagnose loop faults, check device firmware information and fine-tune parameter offsets without on-site wiring operation. It improves the intelligent maintenance level of thermal measurement loops and reduces manual inspection workload in high-temperature hazardous areas.

4. Strong Industrial Anti-interference & Environmental Adaptability Equipped with field-to-backplane electrical isolation and multi-stage signal filtering circuits, the module effectively suppresses high-frequency interference from inverters, motors and high-power electrical equipment. It maintains stable signal output without jitter or drift in complex electromagnetic environments. Industrial-grade component selection supports long-term stable operation under wide temperature fluctuation and dusty industrial conditions.

5. Intelligent Loop Self-diagnosis Function The module supports automatic detection of thermocouple wire breakage, short circuit, signal overload and abnormal loop impedance. All fault information is uploaded to the DeltaV system in real time for log recording and alarm prompting, helping maintenance personnel quickly locate faulty loops and avoid inaccurate temperature monitoring affecting production process stability.

3. Technical Specifications

• Model: KJ3002X1-BG2

• Alternative Part Number: 12P1731X032

• Product Type: 8-Channel Thermocouple / mV Analog Input Module

• Input Signal Type: Multi-type thermocouple signal, millivolt weak voltage signal

• Supported Thermocouple: J, K, T, E, R, S, B series

• Temperature Measurement Range: -200℃ ~ +1800℃

• Measurement Accuracy: ≤ ±0.5% FS

• Communication Protocol: HART compatible

• Field Circuit Rating: 24VDC, 32mA maximum

• Bussed Field Power: 24VDC at 300mA

• Isolation Design: Field-to-backplane electrical isolation

• Response Time: Less than 2 seconds

• Operating Temperature: -40℃ ~ +70℃

• Working Humidity: 5%~95% RH, Non-condensing

• Protection Grade: IP20 (indoor cabinet installation)

• Compatible System: Emerson DeltaV DCS System

• Installation Method: Standard DeltaV DIN rail mounting

• Net Weight: 0.2kg

• Industrial Certification: CE, UL certified for process industrial applications

4. Industrial Application Scenarios

1. Multi-point high-temperature monitoring for industrial furnaces, heating furnaces and thermal reaction equipment in petrochemical plants

2. Precision temperature acquisition and closed-loop control for power plant boiler and auxiliary thermal system units

3. High-temperature process signal collection for metallurgical, ceramic and glass thermal processing production lines

4. Weak mV signal detection and precision calibration for industrial analytical instruments and process testing equipment

5. Intelligent thermal measurement loop renovation and HART diagnosis upgrading for old DeltaV control systems