Application Scenarios
At a North Sea offshore platform, legacy power supplies in the ABB 800xA system experienced thermal shutdowns during summer months due to poor ventilation and 40°C ambient temperatures. The facility upgraded to ABB UFC760BE142 (3BHE004573R0142) modules in redundant pairs across all control racks. The new units operated reliably at 55°C ambient with derating, delivering clean 24 VDC to 128 I/O channels per rack. During a lightning-induced grid sag (down to 90 VAC), the UFC760BE142 maintained output regulation without dropout—preventing a costly process trip. Its built-in diagnostic relay contact also triggered an early-warning alarm in the 800xA HMI when input voltage dipped below threshold, enabling proactive maintenance.
Technical Principles and Innovative Values
Innovation Point 1: True Hot-Swap Redundancy with Diode Decoupling
When paired with an ABB UFC910A diode module, multiple UFC760BE142 units can share load seamlessly. If one fails, the other takes over instantly—with no voltage dip to downstream electronics.
Innovation Point 2: SIL 3 Functional Safety Certification
The PSU’s internal monitoring circuits (OVP, OTP, UVLO) are designed to fail-safe, making it suitable for use in safety instrumented systems (SIS) up to SIL 3.
Innovation Point 3: Universal Input & High Immunity
Operates globally on any mains voltage and withstands ±4 kV surge (IEC 61000-4-5), critical in harsh electrical environments like substations or mines.
Innovation Point 4: Predictive Diagnostics via Relay Contact
The dry contact output signals impending failure (e.g., fan fault, capacitor aging), enabling replacement during planned outages—not after a crash.
Application Cases and Industry Value
In a South American copper concentrator plant, voltage sags from nearby crusher motors caused intermittent AC 800M reboots. After installing redundant UFC760BE142 (3BHE004573R0142) power supplies with UFC910A diode modules, system availability jumped from 98.2% to 99.98%. Over 18 months, zero unplanned outages were attributed to power issues. Maintenance teams used the diagnostic relay to schedule PSU replacements during monthly shutdowns—avoiding emergency callouts. The plant’s automation manager estimated $ 1.2M/year saved in avoided production losses and reduced spare inventory (standardizing on one PSU model across 22 control cabinets).
Related Product Combination Solutions
ABB CM850: Redundant controller chassis with dual PSU slots
ABB UFC910A: Diode redundancy module for parallel PSU operation
ABB SCYC55830 / PM866: AC 800M CPU modules powered by UFC760BE142
ABB PFEA111 / AO810: I/O modules requiring stable 24V DC
ABB TB850: Remote I/O station (also benefits from clean power)
ABB 800xA System Platform: For centralized PSU health monitoring
ABB 3BHE004573R0100: Alternate UFC760 variant (e.g., different current rating)
Installation, Maintenance, and Full-Cycle Support
The ABB UFC760BE142 (3BHE004573R0142) installs directly into the AC 800M backplane—no external wiring needed for output. For redundancy, install two units and connect them via an UFC910A diode module. Input power is typically fed from separate AC sources for true fault tolerance.
Maintenance best practices:
Ensure adequate airflow (min. 10 CFM per module)
Monitor diagnostic relay status via 800xA or PLC
Replace after 8–10 years (electrolytic capacitor lifespan)
We supply only genuine, new-in-box ABB UFC760BE142 (3BHE004573R0142) units, each tested for output stability, overload recovery, and diagnostic functionality. Every module includes a 12-month warranty and full traceability (manufacture date, batch code). Upon request, we provide SIL 3 compliance documentation and integration guidelines for safety systems.
Contact us to secure your control system’s power foundation—because when everything depends on 24 volts, you need the ABB UFC760BE142: resilient, intelligent, and engineered for decades of service
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