Description
3BHE006805R0002 DDC779BE02: Product Overview
The ABB 3BHE006805R0002 DDC779BE02 is a redundant power supply module engineered for ABB’s AC 800M distributed control system (DCS). Designed for mission-critical applications, it delivers dual 24V DC outputs with active current sharing and N+1 redundancy, ensuring uninterrupted power delivery to safety instrumented systems (SIS), turbine controls, and process automation equipment.
Role in Automation Systems:
Positioned as a power integrity backbone, this module ensures continuous operation of controllers (e.g., PM865/PM866) and I/O subsystems. By eliminating single points of failure, it safeguards against power fluctuations, grid outages, and transient faults in industries like refining, power generation, and chemical processing.
Core Functionality:
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Dual Independent Power Conversion Channels:
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Operates in active load-sharing mode to balance thermal stress across components, extending MTBF (>500,000 hours).
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Seamless switchover (<1ms) during primary channel failure, preventing process interruptions.
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Integrated Safety Features:
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ATEX/IECEx Zone 2 Compliance: Suitable for hazardous gas environments (e.g., oil & gas, LNG facilities).
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Overcurrent/Overtemperature Protection: Prevents damage from fault conditions.
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Extreme Environment Readiness:
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Operates at -25°C to +70°C and withstands -40°C cold starts.
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Conformal-coated variants (suffix -CC) resist humidity and corrosive atmospheres.
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Platform Benefits (AC 800M Series):
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Hot-Swap Capability: Replace modules without system shutdown using the 3BSE018105R6002 baseplate .
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Scalability: Supports integration with S800 I/O modules (e.g., CI854 PROFIBUS, TU847 thermocouple inputs).
- Diagnostic Depth: Real-time monitoring via Control Builder M software for predictive maintenance.
ABB 3BHE006805R0002 DDC779BE02
Technical Specifications
Model Number: 3BHE006805R0002 (DDC779BE02)
Manufacturer: ABB
Product Type: Redundant Power Supply Module
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Input Voltage: 100-240V AC (Auto-ranging) / 110-150V DC
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Output Voltage: 24V DC ±1% (Dual Isolated Outputs)
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Output Current: 10A Continuous (20A Peak) per Channel
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Redundancy: N+1 Parallel Operation with Active Load Sharing
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Efficiency: >90% (Typical)
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Operating Temperature: -25°C to +70°C
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Protection: Overcurrent, Overtemperature, Short-Circuit
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Cooling: Convection/Fan-Assisted
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MTBF: >500,000 hours (Calculated)
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Certifications: UL 508, ATEX/IECEx Zone 2, CE, SIL 2
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Dimensions: 128 x 52 x 119 mm (HxWxD)
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Weight: 0.65 kg
Core Features & Customer Value
1. Uninterrupted Power Delivery:
The dual-channel architecture ensures zero downtime during power transitions. For example, in a refinery’s FCCU (Fluid Catalytic Cracking Unit), this module maintains power to safety shutdown systems even if one channel fails, preventing catastrophic equipment damage.
2. Predictive Maintenance:
Integrated diagnostics track capacitor aging and fan degradation, enabling proactive replacement before failure. This reduces unplanned downtime by 30% in critical processes like LNG production.
3. Hazardous Area Compliance:
ATEX/IECEx certification allows deployment in Zone 2 environments (e.g., offshore platforms), where explosive gas atmospheres require stringent electrical safety standards.
4. Simplified Hot-Swap:
The module’s pre-charge circuit ensures safe replacement without system interruption. In power plants, this minimizes turbine trip risks during maintenance.
ABB 3BHE006805R0002 DDC779BE02
Typical Applications
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Nuclear Power Plants:
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Powers safety-rated AC 800M controllers managing reactor coolant pumps. A fault in one power channel triggers automatic switchover to the redundant channel, ensuring reactor stability.
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Offshore Oil Platforms:
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Feeds subsea ESD (Emergency Shutdown) valves and gas turbine controls. Its salt-fog resistance and vibration immunity ensure reliability in harsh maritime conditions.
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Pharmaceutical Manufacturing:
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Maintains power to sterile filling line automation systems. SIL 2 compliance ensures compliance with FDA 21 CFR Part 11 for batch integrity.
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LNG Terminals:
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Supports cryogenic temperature monitoring chains (-162°C). Redundancy prevents data loss during extreme cold operations.
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