Product Overview

The Emerson KJ3002X1-BG2 (Part Number 12P1731X032) is a precision 8-channel analog input module specifically engineered for the DeltaV™ M-series I/O subsystem. This module provides a high-resolution interface for direct millivolt (mV) and thermocouple signals, eliminating the need for external signal transmitters in the field. By integrating cold junction compensation and linearized temperature data directly into the Distributed Control System (DCS), the KJ3002X1-BG2 ensures superior measurement accuracy for critical thermal monitoring applications.

As a core component of the DeltaV architecture, this module supports a variety of standard thermocouple types and low-level voltage inputs. It is designed to be hot-swappable, allowing for hardware replacement without disrupting the power or communication of other modules on the same carrier. Its rugged industrial design and high-density 8-channel configuration make it an essential tool for high-precision temperature tracking in demanding process environments.

Technical Characteristics and Performance

The KJ3002X1-BG2 is built to provide stable, low-noise signal acquisition in electrically noisy industrial settings.

• Direct Thermocouple Interface: Supports standard thermocouple types (including J, K, T, E, R, S, B, and N) and millivolt inputs ranging from -100 mV to +100 mV.

• Integrated Cold Junction Compensation: When paired with the appropriate terminal block, the module automatically compensates for ambient temperature variations at the connection point to maintain laboratory-grade accuracy.

• Open Sensor Detection: Advanced diagnostics continuously monitor the integrity of the field wiring, immediately alerting the system to any sensor burnout or lead-wire breakage.

• High Common Mode Rejection: Sophisticated filtering circuitry minimizes the impact of electromagnetic interference (EMI) and 50/60 Hz line noise on sensitive low-voltage measurements.

• Galvanic Isolation: Provides 1500V peak isolation between the field-side sensors and the internal system logic, protecting the DCS from ground loops and high-voltage transients.

• Plug-and-Play Configuration: Seamlessly recognized by DeltaV Explorer, enabling rapid software assignment of thermocouple types and engineering units for each individual channel.

Technical Specifications

• Manufacturer: Emerson (Fisher-Rosemount)

• Model Designation: KJ3002X1-BG2

• Part Number: 12P1731X032

• Input Type: 8-Channel Thermocouple / mV

• Signal Range: ±100 mV

• Resolution: 16-bit A/D conversion

• System Series: DeltaV™ M-series I/O Subsystem

• Isolation: 1500V AC (Field to Logic)

• Dimensions: 4.1 x 12.5 x 10.5 cm

• Weight: 0.2 kg

• Country of Origin: USA

Industrial Applications

The Emerson KJ3002X1-BG2 Thermocouple Module is widely deployed in sectors where precise thermal management is vital for safety and product quality:

• Petrochemical Refining: Monitoring reactor bed temperatures and distillation column profiles.

• Power Generation: Tracking turbine bearing temperatures and exhaust gas temperatures (EGT).

• Chemical Processing: Supervising exothermic reactions in specialized pressure vessels.

• Glass and Ceramics: Controlling high-temperature furnace and kiln profiles where precise mV sensing is required.