Overview

The ABB 3BHE044249R0003, also referenced as GDC806C0003, is an industrial gas detection and control module designed for continuous monitoring of combustible and toxic gases in process plants. Built for ABB’s automated safety and control systems, this module provides fast, reliable gas detection, real-time data processing, and alarm signaling to prevent hazardous conditions. Its rugged design ensures high reliability in harsh industrial environments, including oil, gas, chemical, and petrochemical facilities.

Technical Specifications

Features and Benefits

Rapid Gas Detection: Provides early warning of combustible or toxic gases

Integrated Control: Automatically triggers alarms, shutdowns, or ventilation systems

Multiple Sensor Support: Compatible with catalytic, infrared, or electrochemical sensors

Reliable Industrial Design: Resistant to vibration, dust, EMI, and high humidity

Real-Time Monitoring: Continuous monitoring with immediate response capability

Flexible Communication: Supports Modbus and PROFIBUS DP for integration with DCS or SCADA systems

Diagnostics and Status Indication: Built-in LEDs and relay outputs for fault detection and system health

Structure and Components

The module includes:

Sensor Interface Board: Connects to multiple gas sensors and converts signals into readable data

Control Processor: Processes sensor data, applies thresholds, and manages alarms

Relay Output Section: Provides outputs for emergency shutdown, alarms, or safety interlocks

Communication Interface: Allows integration with control systems for remote monitoring

Protective Housing: Industrial-grade casing for environmental protection

Status Indicators: Visual indicators for operational, alarm, and fault conditions

This modular structure allows for easy maintenance, calibration, and replacement of components without system downtime.

Applications

Oil and gas production and refining facilities

Chemical and petrochemical plants

Power generation plants (gas and coal-fired)

Industrial manufacturing environments requiring combustible/toxic gas monitoring

Ventilation and safety control systems

Distributed Control System (DCS) and SCADA integrated safety monitoring

The module is essential for maintaining safety standards and complying with industrial safety regulations.

Installation Guidelines

Mount in a clean, ventilated area free from excessive vibration

Connect sensor inputs, power supply, and communication lines according to ABB wiring diagrams

Verify grounding and shielding to minimize electromagnetic interference

Calibrate sensors before initial operation

Ensure proper alarm relay connection to plant shutdown or ventilation systems

Maintenance and Service

Inspect wiring connections periodically for integrity and corrosion

Test and calibrate sensors regularly according to ABB maintenance schedules

Clean the protective housing to avoid dust accumulation

Replace faulty sensors or module components only with ABB-approved parts

Monitor system diagnostics through LEDs or connected SCADA/DCS

Advantages

Provides fast and accurate gas detection for hazardous environments

Integrates detection, control, and communication in a single module

Supports multiple sensors and flexible deployment configurations

Industrial-grade reliability ensures continuous operation

Enhances workplace safety and regulatory compliance