ABB GBU72

Description

Detailed parameter table

ABB GBU72 3BHE055094R0002

Product introduction

The ABB GBU72 is a high-performance power supply unit designed to deliver stable and reliable 24 VDC power to industrial control systems, PLCs, and various automation components. As a key part of ABB’s industrial power solutions, the GBU72 combines robust design with efficient operation to meet the demanding power requirements of modern industrial environments.

This 10 A power supply accepts a wide input voltage range (100-240 VAC), making it suitable for global applications without the need for voltage adjustments. In industrial setups, the ABB GBU72 acts as a critical power source, ensuring consistent energy delivery to sensitive control devices even during voltage fluctuations or harsh operating conditions. Its compact size and DIN rail mounting design allow for easy integration into control cabinets, saving space while providing essential power conditioning for optimal system performance.

Core advantages and technical highlights

Wide input compatibility: The ABB GBU72 supports 100-240 VAC input, eliminating the need for manual voltage selection. This feature is particularly valuable for multinational industrial facilities or equipment exported to different regions, as it can adapt to varying mains voltages without additional hardware modifications. Whether installed in a 110 VAC environment in North America or a 230 VAC setup in Europe, the GBU72 maintains stable 24 VDC output, ensuring uninterrupted operation of connected control systems.

High efficiency and low ripple: With an efficiency rating of ≥ 88% at full load, the ABB GBU72 minimizes energy loss, reducing heat generation and operational costs. This efficiency is crucial in control cabinets with multiple heat-generating components, as it helps maintain lower ambient temperatures. Additionally, its low ripple output (≤ 50 mV p-p) protects sensitive electronics like PLC modules and sensors from voltage noise, preventing data errors or device malfunctions. In precision applications such as semiconductor manufacturing, where even minor voltage fluctuations can affect production quality, the GBU72‘s clean power output is indispensable.

Comprehensive protection features: The ABB GBU72 incorporates multiple protective mechanisms to safeguard both the power supply and connected equipment. Overload protection (110-150% of rated current) prevents damage during temporary current spikes, such as when multiple devices start simultaneously. Short circuit protection uses a hiccup mode to limit current, automatically restoring power once the fault is resolved—eliminating the need for manual resets in non-critical faults. These protections reduce downtime and maintenance costs, making the GBU72 a reliable choice for mission-critical systems.

Rugged industrial design: Built to withstand harsh industrial environments, the ABB GBU72 operates reliably in temperatures ranging from -25°C to +70°C. This wide range allows installation in unheated outdoor enclosures or hot factory floors without performance degradation. Its DIN rail mounting ensures secure installation, even in vibrating environments like near heavy machinery. The IP20 protection class shields internal components from dust and accidental contact, maintaining long-term reliability in dirty or busy industrial settings.

Typical application scenarios

In automotive manufacturing plants, the ABB GBU72 powers control systems for robotic welding stations. It supplies 24 VDC to PLCs, proximity sensors, and servo drive controllers, ensuring precise coordination of welding torches. During peak production, when multiple robots operate simultaneously, the GBU72‘s overload protection handles sudden current increases, preventing shutdowns that could disrupt the assembly line. Its stable output also reduces sensor errors, ensuring accurate part positioning and consistent weld quality.

Water treatment facilities utilize the ABB GBU72 to power SCADA system components and valve actuators. Installed in outdoor control cabinets, the GBU72 withstands temperature extremes and humidity, delivering reliable power to level sensors and motor controllers. During heavy rain or extreme cold, its wide operating temperature range ensures uninterrupted operation, critical for maintaining water flow and treatment processes. The GBU72‘s short circuit protection also safeguards against faults caused by water ingress in wiring, preventing damage to expensive SCADA modules.

Food and beverage processing plants rely on the ABB GBU72 to power hygiene-critical equipment like conveyor belt controllers and sanitization system sensors. Its low ripple output ensures accurate operation of pH meters and flow sensors, maintaining compliance with food safety standards. The GBU72‘s efficiency reduces heat output, making it suitable for installation in temperature-controlled clean rooms where excess heat could affect product quality. In case of a short circuit in a conveyor motor, the GBU72‘s protection mechanisms isolate the fault, preventing widespread system shutdowns and production losses.

ABB GBU72 3BHE055094R0002

Related model recommendations

GBU71: A 5 A variant of the GBU72, ideal for smaller systems with lower power demands, such as control panels for packaging machines. It shares the same protection features and input range but with half the current capacity.

GBU73: A 15 A higher-capacity model, suitable for powering larger systems with multiple devices. It pairs with the GBU72 in distributed power setups, allowing load distribution across multiple power supplies.

S800 I/O modules: ABB’s S800 series I/O modules, such as the DI810 digital input module, are commonly powered by the GBU72. The GBU72 provides stable 24 VDC to these modules, ensuring reliable signal processing in DCS systems.

AC500 PLC: ABB’s AC500 modular PLC system integrates seamlessly with the GBU72, which supplies power to CPU modules, communication cards, and I/O extensions. This combination forms a robust control solution for medium to large industrial processes.

TB521 terminal block: ABB’s TB521 terminal block simplifies wiring between the GBU72 and connected devices, providing surge protection and organized cable management. It enhances installation efficiency and protects against voltage transients.

PSU860: A redundant power supply system that uses two GBU72 units in parallel. It ensures uninterrupted power by automatically switching to the backup unit if the primary fails, critical for systems where downtime is costly, like in nuclear power plants.

Installation, commissioning and maintenance instructions

Installation preparation: Before installing the ABB GBU72, verify the input voltage matches the mains supply (100-240 VAC). Ensure the DIN rail is clean, securely mounted, and rated to support the GBU72‘s weight. Use insulated tools and wear anti-static wristbands when handling the unit to prevent ESD damage. Check that the installation environment meets the -25°C to +70°C temperature range and is free from excessive moisture or corrosive gases. Connect input and output wiring using appropriately sized cables (16-24 AWG) and torque terminals to 0.5-0.8 Nm—over-tightening can damage terminals, while loose connections cause overheating.

Maintenance suggestions: Inspect the ABB GBU72 quarterly for loose connections, dust accumulation, or signs of overheating (discolored components). Clean dust with compressed air (max 5 bar) to maintain cooling efficiency. Monitor output voltage periodically using a multimeter—deviations beyond ±5% of 24 VDC indicate a potential issue. If the GBU72 enters protection mode, identify and resolve the root cause (e.g., shorted wiring, overloaded devices) before resetting. Replace the unit if it repeatedly trips or output voltage becomes unstable, using only genuine ABB replacements to ensure compatibility. Store spare GBU72 units in a dry, temperature-controlled environment (-40°C to +85°C) to preserve performance.

Service and guarantee commitment

ABB backs the GBU72 with a 3-year warranty, covering defects in materials and workmanship. This warranty reflects confidence in the product’s durability, tested under rigorous industrial conditions. Customers receive access to ABB’s global technical support network, including online resources (manuals, troubleshooting guides) and 24/7 phone assistance for installation or operational issues.

For critical applications, ABB offers optional on-site service, where certified technicians assist with installation, commissioning, or repairs. In the event of a warranty claim, ABB provides rapid replacement (typically within 48 hours in major regions) to minimize downtime. The company also ensures long-term availability of spare parts, supporting the GBU72 for at least 10 years after production—protecting customer investments in industrial infrastructure. With these commitments, the ABB GBU72 delivers not just reliable power, but peace of mind for industrial operators.