The ABB KV C758 A124 (3BHE021951R0124) Isolated Power Supply is a precision-engineered module designed to provide stable, regulated, and isolated power for ABB industrial automation and control systems. It is widely used in distributed control systems (DCS), motor control centers, and relay panels, ensuring safe and reliable operation of sensitive electronics in high-noise and high-voltage environments.

This isolated power supply delivers clean DC output while maintaining electrical isolation between input and output circuits, preventing ground loops, reducing electrical noise, and enhancing system safety. It supports both standard and critical industrial loads, providing high efficiency and consistent voltage regulation even under fluctuating input conditions.

The KV C758 A124 is particularly valued for its robustness, compact design, and compatibility with ABB’s legacy and modern automation platforms, enabling seamless integration into existing systems.

Product Specifications

Product Applications

The KV C758 A124 isolated power supply is used extensively in industrial and utility environments:

• Distributed Control Systems (DCS) – Provides reliable power to controllers, I/O modules, and interface boards.

• Motor Control Centers (MCC) – Powers control circuits, relay boards, and auxiliary equipment.

• Industrial Automation – Supplies stable voltage to sensors, PLCs, and HMI panels.

• Renewable Energy Systems – Powers control electronics in wind turbines and solar inverters.

• Power Utilities – Supplies isolated power for switchgear, relay protection, and SCADA systems.

• Process Industries – Ensures stable operation of critical instrumentation in chemical, petrochemical, and manufacturing plants.

Product Advantages

• Electrical Isolation – Prevents ground loops and protects sensitive electronics from voltage spikes.

• Stable Output Voltage – Provides regulated 24 V DC, ensuring reliable operation of connected devices.

• High Efficiency – ≥90% efficiency reduces heat generation and energy consumption.

• Compact and Modular – Small footprint for DIN rail or panel mounting saves installation space.

• Wide Input Range – Compatible with 100–240 V AC input, suitable for global industrial applications.

• Robust Operation – Designed to withstand industrial temperature and humidity conditions.

• Standards Compliant – IEC, UL, and CE certified for safety and performance.

FAQ

1. What is the input voltage range for the KV C758 A124?

   The module operates with a wide input range of 100–240 V AC at 50/60 Hz, allowing global compatibility.

2. What output voltage and current does this power supply provide?

   It delivers a regulated 24 V DC output at 5 A nominal, sufficient for standard industrial control modules.

3. Does the module provide electrical isolation between input and output?

   Yes, the supply provides 1500 V AC isolation, protecting downstream electronics and preventing ground loops.

4. Can it be mounted on a DIN rail?

   Yes, it supports both DIN rail and panel mounting for flexible installation in control cabinets.

5. Is this power supply suitable for motor control centers (MCCs)?

   Yes, it provides reliable and isolated 24 V DC for MCC control circuits, relays, and auxiliary devices.

6. What is the efficiency of the KV C758 A124?

   The module achieves ≥90% efficiency, minimizing energy losses and heat generation.

7. Can it operate in high-humidity environments?

   Yes, it is rated for 10–95% relative humidity (non-condensing), suitable for typical industrial conditions.

8. Does it provide protection against voltage fluctuations?

   Yes, the regulated design ensures stable 24 V DC output even under varying AC input conditions.

9. Is it compatible with ABB legacy control systems?

   Yes, it is designed to integrate with both legacy and modern ABB automation and control platforms.

10. What standards and certifications does the module meet?

    It complies with IEC 60950-1, UL, and CE standards, ensuring safe and reliable operation in industrial environments.