ABB 3BHB002751R0106

Description

Detailed Parameter Table

ABB 3BHB002751R0106

Product Introduction

The 3BHB002751R0106 is a high-reliability power supply module from ABB, designed specifically to provide stable DC power to control and auxiliary circuits in ABB’s Advant OCS (Open Control System) and Symphony Distributed Control Systems (DCS). As a critical component in process automation, it converts AC input voltage (115/230 V) into regulated DC outputs (5 V, ±15 V, 24 V), ensuring reliable operation of processors, communication interfaces, and I/O modules within the control system.

Engineered for industrial environments, this power supply module features robust protection mechanisms and forced air cooling, making it suitable for continuous operation in control rooms and process plant cabinets. Its compatibility with Symphony DCS and Advant OCS components ensures seamless integration, while the multi-voltage output design eliminates the need for multiple standalone power supplies. Whether deployed in power generation, chemical processing, or oil and gas facilities, the 3BHB002751R0106 delivers consistent performance, minimizing downtime in critical control systems.

Core Advantages and Technical Highlights

Multi-voltage output design
The 3BHB002751R0106 provides four regulated DC outputs (5 V, +15 V, -15 V, 24 V) in a single module, simplifying power distribution in control systems. In a power plant’s Symphony DCS, this integration allows the module to:

Supply 5 V to the central processing unit (CPU) of 3BHB003511R0101 controller modules

Provide ±15 V to analog I/O circuits in 3BHB001869R0001 modules for sensor signal conditioning

Deliver 24 V to relay coils and status indicators in the control cabinet
This reduces wiring complexity and eliminates potential points of failure from multiple power supplies.

Robust protection mechanisms
Equipped with overvoltage, overcurrent, short-circuit protection, and thermal shutdown, the module safeguards both itself and connected control components. In a chemical plant’s Advant OCS, a sudden short circuit in a field wiring loop triggers the module’s overcurrent protection, isolating the fault and preventing damage to the CPU module—avoiding costly system outages.

Continuous operation capability
With forced air cooling and a wide operating temperature range (0°C to +50°C), the 3BHB002751R0106 maintains stable output even in warm control cabinets. In a refinery’s DCS room, where ambient temperatures can reach 45°C during summer, the integrated fan ensures the module operates within safe limits without derating, critical for uninterrupted process control.

Typical Application Scenarios

In a coal-fired power plant’s boiler control system (Symphony DCS):

3BHB002751R0106 modules supply power to the main control rack, which manages boiler temperature, pressure, and fuel flow.

5 V output powers the CPU in 3BHB003511R0101 controller modules, ensuring precise regulation of combustion air flow.

±15 V outputs support analog I/O modules that monitor steam temperature and pressure sensors, converting their signals for processing.

24 V output energizes relays controlling fuel valves, with overcurrent protection preventing damage during valve actuation surges.

Redundant configuration (two modules) ensures uninterrupted power if one unit fails, critical for preventing boiler trips.

In a chemical plant’s batch reactor control system (Advant OCS):

The power supply module provides stable power to the control system managing reactor temperature and chemical dosing.

5 V output maintains operation of the system’s communication processor, ensuring data transmission to the plant’s SCADA system.

24 V output powers digital I/O modules that activate solenoid valves for reactant injection.

Thermal shutdown protection prevents module failure during extended batch cycles (up to 72 hours), where cabinet temperatures rise due to continuous operation.

ABB 3BHB002751R0106

Related Model Recommendations

3BHB003511R0101: Controller module for Symphony DCS, powered by the 5 V output of 3BHB002751R0106.

3BHB001869R0001: Analog I/O module that uses ±15 V from 3BHB002751R0106 for signal processing.

3BHB002751R0107: Higher-power variant (300 W) of 3BHB002751R0106 for larger control system configurations.

3BSE008519R1: Power distribution unit that distributes 3BHB002751R0106 outputs to multiple DCS components.

3BHB006514R0001: Redundancy module that pairs two 3BHB002751R0106 units for fault-tolerant power supply.

3BHB001394R0001: Fan replacement kit for 3BHB002751R0106 to maintain cooling efficiency.

Installation, Commissioning and Maintenance Instructions

Installation preparation
Mount the 3BHB002751R0106 in the designated slot of the Symphony DCS or Advant OCS rack, ensuring proper alignment with the backplane connector. Secure the module with front-panel screws (torque to 0.8 Nm). Connect the AC input (115 V or 230 V) to the terminal block, ensuring correct voltage selection via the module’s input switch. Verify that the control rack’s ground is properly connected to the module’s chassis to prevent noise interference.

Commissioning steps
Power on the AC supply and verify the module’s power LED illuminates green. Measure each DC output with a multimeter to confirm voltages are within ±5% of nominal values (5 V: 4.75-5.25 V; ±15 V: ±14.25-±15.75 V; 24 V: 22.8-25.2 V). Test fault conditions by temporarily connecting a 10 Ω resistor to the 5 V output (to simulate a short circuit) and confirming the module shuts down the affected output and triggers a fault LED. Reset the module and verify normal operation resumes.

Maintenance suggestions
Inspect 3BHB002751R0106 monthly by checking the fan operation—listen for abnormal noise or reduced airflow, which indicates the need for fan replacement (using 3BHB001394R0001 kits). Clean air vents quarterly with compressed air to remove dust and ensure cooling efficiency. Measure output voltages annually under load to confirm they remain within tolerance. Replace the module if outputs drift beyond ±5% or if protection features repeatedly activate without external faults. Use only ABB-approved replacements to maintain compatibility with DCS components.

Service and Guarantee Commitment

The 3BHB002751R0106 is backed by a 2-year warranty, covering defects in materials and workmanship under normal operating conditions. ABB’s DCS technical support team provides guidance on installation, redundancy configuration, and troubleshooting with Symphony/Advant OCS systems.

Customers receive access to detailed wiring diagrams and maintenance procedures specific to 3BHB002751R0106. ABB offers rapid replacement services for faulty modules, with global distribution ensuring minimal downtime for critical control systems. Training programs on power supply maintenance for Symphony DCS are also available, helping plant personnel maximize the module’s lifespan and reliability.