Description
The B&R 8AC120.60-1 is a robust 120W DIN-rail power supply engineered for critical industrial automation systems within B&R’s X20 platform. Designed to deliver stable 24 V DC power to controllers and I/O modules, this unit features universal 85–264 V AC input (47–63 Hz) with active power factor correction (PFC >0.95), ensuring compatibility with global grid voltages while minimizing harmonic distortion. Its high efficiency (94% typical) reduces heat dissipation by 30% compared to conventional power supplies, enabling dense panel layouts without forced cooling. The B&R 8AC120.60-1 incorporates advanced holdup technology (20 ms at full load) to bridge brief power interruptions, preventing system resets during voltage sags in sensitive processes like robotic assembly or batch control.
Integrated diagnostics monitor output voltage, current, temperature, and load status, streaming real-time health data via X2X Link to B&R’s Automation Studio for predictive maintenance. Certified for SIL 2 applications, this module operates across -25°C to +70°C with derating above 60°C. The compact 60 mm width features screw-clamp terminals for vibration-resistant connections and supports hot-swap replacement when used with redundant configurations. As the backbone of resilient control systems, the B&R 8AC120.60-1 ensures uninterrupted operation in manufacturing, energy, and infrastructure applications where power stability is non-negotiable.

8AC120.60-1 B&R
Technical Specifications
| Parameter Name | Parameter Value |
| Product Model | 8AC120.60-1 |
| Manufacturer | B&R Automation (ABB Group) |
| Product Type | System Power Supply |
| Input Voltage | 85–264 V AC (47–63 Hz) |
| Output Voltage | 24 V DC (±1%) |
| Rated Output Power | 120 W |
| Max Output Current | 5 A |
| Efficiency | 94% (Typical) |
| Power Factor Correction | >0.95 |
| Hold-up Time | 20 ms @ Full Load |
| Ripple & Noise | < 150 mVpp |
| Protections | Overload, Short-circuit, Overtemperature |
| Operating Temperature | -25°C to +70°C (Derating above 60°C) |
| Cooling | Convection (No fan) |
| Communication | X2X Link (Diagnostics) |
| Certifications | CE, UL, cULus, IEC 62368-1, SIL 2 |
Main Features and Advantages
Grid-Independent Operation: The B&R 8AC120.60-1 maintains stable 24 V DC output despite ±20% input voltage fluctuations – critical for plants with unstable generators. Active PFC reduces input current harmonics by 40%, preventing tripping of sensitive RCDs.
Ultra-Fast Power Bridging: Supercapacitor-based holdup (20 ms) sustains controllers during motor-start sags, avoiding costly reboots. This exceeds standard PSUs by 4×, protecting unsaved process data.
Intelligent Diagnostics & Scalability: Real-time monitoring of voltage, current, and temperature enables predictive maintenance. Front-panel LEDs indicate load status (green/yellow/red thresholds). The 8AC120.60-1 supports parallel operation (N+1 redundancy) without external controllers – simply connect multiple units to achieve fault-tolerant power.
Space-Optimized Resilience: At just 60 mm wide, it delivers 120W without fans – eliminating dust intake and acoustic noise. Reinforced terminals accept wires up to 4 mm², while conformal coating options protect against corrosive atmospheres.
Application Field
The B&R 8AC120.60-1 secures operations across power-sensitive industries:
Automotive: Powers robotic weld controllers during spot-welding voltage dips (15–20 ms).
Packaging: Prevents PLC resets during servo-driven cartoner motor surges.
Renewables: Backs up wind turbine pitch control during grid transients.
Water Treatment: Maintains chemical dosing pumps during generator switchovers.
Pharma: Ensures batch integrity in bioreactors during brief utility outages.
Material Handling: Sustains conveyor sortation controllers during motor braking regeneration.

8AC120.60-1 B&R
Related Products
B&R 8AC120.60-2: Redundant version with active load sharing for critical systems.
B&R 8AC110.60-1: 60W compact power supply for space-limited cabinets.
B&R X20PS9400: Modular system supply with hot-swap DC/DC converters.
B&R 5AC010.00: DIN-rail UPS for extended backup (minutes/hours).
B&R 7DC170.60: Energy monitoring module for tracking 8AC120.60-1 consumption.
B&R 8AP121.60: Redundancy module for automated failover between PSUs.
B&R 7EP133.60: Fuse module for output circuit protection.





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