Puls QS40.241 960W DIN Rail Power Supply 24VDC 40A

The Puls QS40.241 is a high-performance DIN rail power supply from the Dimension Q-Series, engineered for industrial automation applications requiring reliable and efficient power conversion. This single-phase power supply delivers 24VDC at 40A continuous output (960W) and features Puls's innovative BonusPower technology, providing 50% additional power (1440W) for up to 4 seconds to handle demanding loads such as DC motors and capacitive loads. The QS40.241 achieves exceptional efficiency of up to 94.6% at full load, minimizing energy loss and reducing cooling requirements in control cabinets.

Key Specifications

• Output Voltage: 24-28VDC (adjustable)

• Continuous Output Current: 40A at 24V, 34.3A at 28V

• Continuous Output Power: 960W

• Short-term Peak Power: 1440W for up to 4 seconds

• Input Voltage Range: 100-240VAC ±15%, 50/60Hz

• AC Input Current: 8.6A at 120VAC, 4.5A at 230VAC

• Power Factor: 0.99 at 120/230VAC

• Efficiency: 93.6% at 120VAC, 94.6% at 230VAC

• Output Ripple: <100mVpp (20Hz to 20MHz)

• Hold-up Time: 27ms at 120/230VAC

• Dimensions (W x H x D): 125 x 124 x 127mm

• Weight: 1.9kg (4.2lb)

• Operating Temperature: -25°C to +70°C (derating above 60°C)

Advanced Power Technology

The QS40.241 incorporates cutting-edge power conversion technologies including synchronous rectification and a bridgeless PFC circuit, which together achieve the outstanding efficiency and compact size characteristic of the Dimension Q-Series. The synchronous rectification replaces traditional diodes with active MOSFET switches, reducing conduction losses and improving efficiency, particularly at partial loads. The bridgeless PFC topology eliminates the input diode bridge, further reducing power dissipation. These innovations allow the QS40.241 to deliver 960W in a 125mm wide package, achieving a power density that significantly reduces panel space requirements compared to conventional power supplies.

BonusPower Reserve Capacity

The QS40.241 features Puls's exclusive BonusPower technology, providing a 50% power reserve (1440W) for short-term peak loads up to 4 seconds. This reserve capacity is particularly valuable for applications with intermittent high-demand loads such as motor starting, solenoid actuation, and capacitor charging. The built-in large-sized output capacitors store energy that can be released during peak demand periods, often allowing a lower wattage class power supply to be specified for applications that would otherwise require a larger, more expensive unit. The BonusPower capability reduces system cost while maintaining reliable operation under demanding load conditions.

Efficiency and Energy Savings

With efficiency ratings of 94.6% at full load and excellent partial load efficiency, the QS40.241 minimizes energy waste and reduces heat dissipation within control cabinets. Lower power losses translate directly to reduced energy consumption and lower operating costs over the life of the equipment. The high efficiency also reduces the cooling requirements for the control enclosure, potentially eliminating the need for cabinet fans in many applications and contributing to quieter, more reliable system operation. The QS40.241's efficiency performance is consistent across a wide input voltage range, ensuring optimal operation in regions with varying line voltages.

Protection and Safety Features

The QS40.241 incorporates comprehensive protection features to ensure reliable operation and safeguard connected equipment. The active inrush current limitation circuit keeps input inrush current to negligible levels (maximum 25A peak at 100VAC), preventing nuisance tripping of upstream circuit breakers during power-up. The HiccupPLUS overload protection mode automatically shuts down and attempts restart when an overload condition is detected, protecting the power supply from damage while allowing automatic recovery when the fault clears. Output is protected against short circuit, overcurrent, and overvoltage conditions. The unit includes an integrated input fuse, simplifying installation and reducing component count.

Monitoring and Control Interfaces

The QS40.241 provides comprehensive monitoring and control features for integration into automation systems. A DC-OK relay contact provides isolated status signaling, indicating normal output voltage conditions to a PLC or control system. A green DC-OK LED and red overload LED offer visual status indication at the unit. The shut-down input allows remote control of the output, enabling power-down sequences controlled by a PLC or emergency stop system. Remote control of output voltage is also supported, allowing dynamic adjustment of the output setpoint based on system requirements. These features enable the power supply to function as an intelligent component within the automation architecture.

Parallel Operation and Redundancy

The QS40.241 supports parallel operation for higher power requirements or redundant configurations. The current sharing feature ensures equal load distribution when units are connected in parallel, maximizing system reliability and preventing any single unit from being overloaded. For high-availability applications, redundant configurations can be implemented using external redundancy modules such as the YR80.242 or YR40.245. These modules isolate each power supply output, allowing the system to continue operating even if one power supply fails. The combination of parallel operation and redundancy capabilities provides scalable, fault-tolerant power solutions for critical automation applications.

Environmental and Installation Ratings

The QS40.241 is designed for reliable operation in demanding industrial environments. The unit delivers full power across a wide temperature range of -25°C to +60°C, with derating of 24W/°C from +60°C to +70°C. The unit is approved for ATEX and IECEx hazardous area applications, expanding its suitability for use in explosive atmospheres common in oil and gas, chemical, and pharmaceutical industries. The partially conformal coated PCB version (QS40.241-C2) provides enhanced protection against moisture and airborne contaminants. The unit carries comprehensive international approvals including UL508, IEC 61010-2-201, DNV GL for marine applications, and EAC.

Internal Data Logging

The QS40.241 includes internal data logging functionality for troubleshooting and maintenance analysis. The data logging feature records operational parameters and fault events, providing valuable information for diagnosing intermittent issues and verifying system performance. This diagnostic capability supports predictive maintenance programs by identifying developing problems before they cause system downtime. The logged data can be accessed for analysis, helping maintenance personnel understand the operating history of the power supply and the connected loads.

Industrial Applications

The Puls QS40.241 is deployed across a wide range of industrial automation applications requiring reliable, high-current 24VDC power. In machine automation, it powers PLC systems, I/O modules, and control circuits. In process control, it supplies field instruments, actuators, and communication devices. In material handling, it powers conveyor controls, sortation equipment, and automated storage systems. In building automation, it supplies HVAC controls, lighting systems, and security equipment. The unit's combination of high efficiency, compact size, and robust protection makes it suitable for control cabinets, panel shops, and OEM machinery applications worldwide.

Conclusion

The Puls QS40.241 DIN rail power supply delivers 960W of reliable 24VDC power with 40A output, 94.6% efficiency, and 50% BonusPower reserve. Its advanced technology, comprehensive protection features, and wide international approvals make it an excellent choice for demanding industrial automation applications requiring efficient and dependable power conversion.