Product Overview

The Emerson KJ3002X1-BC1, identified by part number 12P0681X092, is a specialized 4-wire Analog Input (AI) module engineered for the DeltaV™ M-series I/O subsystem. This 8-channel card is specifically designed to interface with 4-wire transmitters, where the field device is powered by an external source rather than the control loop itself. It provides the precision necessary for monitoring critical process variables including pressure, temperature, mass flow, and tank levels within a Distributed Control System (DCS) environment.

As a core component of the Fisher-Rosemount legacy systems, the KJ3002X1-BC1 ensures high-fidelity data acquisition by providing dedicated signal paths for each of its eight channels. Although the manufacturer moved this module to a discontinued lifecycle status in late 2018, it remains an essential hardware asset for facilities maintaining or expanding existing M-series controller arrays.

Technical Characteristics and Circuit Design

• 4-Wire Architecture: Optimized for externally powered field instruments, ensuring clear signal separation and reducing the electrical load on the I/O carrier.

• High-Density Monitoring: Features 8 independent channels within a compact form factor, allowing for efficient rack space utilization.

• Galvanic Signal Isolation: Protects the internal system logic from field-side electrical transients and ground loops, ensuring signal integrity in high-EMI environments.

• HART Pass-Through: Supports the transmission of digital HART metadata, enabling remote instrument configuration and advanced asset management through DeltaV software.

• Hot-Swappable Functionality: Designed for "Removal and Insertion Under Power" (RIUP), allowing for module replacement without interrupting the operation of adjacent I/O cards.

• Active Hardware Diagnostics: Continuously monitors the health of the input circuitry, providing real-time alerts for channel failures or out-of-range conditions.

Technical Specifications

• Manufacturer: Emerson Process Management

• Model Number: KJ3002X1-BC1

• Part Number: 12P0681X092

• Module Type: 8-Channel 4-Wire Analog Input (4-20 mA)

• Series: DeltaV M-series

• Resolution: 16-bit A/D conversion

• Dimensions: 4.3 x 12.5 x 10.5 cm

• Weight: 0.3 kg

• Country of Origin: USA

• HS Code: 8537101190

Industrial Application Environments

• Chemical Processing: Precise monitoring of reagent flow and reactor pressure in 4-wire sensor networks.

• Oil and Gas Production: Integration of high-power field instruments in hazardous area enclosures.

• Power Utilities: Real-time data acquisition for turbine monitoring and boiler control subsystems.

• Water and Wastewater: Interface for remote flow meters and analytical sensors requiring external power.