A comprehensive range of single-phase, two-phase, and three-phase switching power supplies designed to meet the demands of a wide variety of applications.
The SW series includes industrial switching power supplies with single-phase, two-phase and three-phase input, power up to 600W and currents up to 25A, designed for integration into electrical panels and automation systems.
Thanks to the wide input voltage ranges (115-230 Vac single-phase, 230-500 Vac two-phase, 400-500 Vac three-phase), these power supplies are compatible with different international electrical distribution systems, making them suitable for equipment intended for export.
Operating temperature range from -25°C to +70°C. Featuring DIN rail mounting and IP20 protection rating, they combine versatility and reliability.
The SW series power supplies are designed for integration into machinery and systems compliant with Machinery Directive standard IEC 60204-1, ensuring reliable power supply for industrial automation.
Single-Phase, Two-Phase and Three-Phase Switching Power Supplies – SW Series
The SW series is engineered for industrial applications where reliability, ruggedness, and ease of installation are critical requirements. Its versatile range of configurations makes it suitable for a wide variety of industrial environments, from factory automation to control panels and switchgear.
Key Technical Specifications
- Output voltages: 5 V, 12 V, 24 V, 48 V DC
- Output currents: from 2.5 A to 25 A (see tables for specific values by model)
- Integrated protections: three selectable modes for short-circuit and overload protection — Hiccup Mode, Continuous Mode, and Manual Reset
- Universal input voltage: 115/230 / 400 / 500 Vac
- Compact dimensions with a form factor optimized for DIN rail installation
- High efficiency: up to 92% at 50–100% of rated load
- Italian manufacturing since 1968
- Warranty: 2 years
Additional Technical Details
Input Voltages:
- Single-phase: 90-260 Vac
- Two-phase: 360-530 Vac
- Three-phase: 330-550 Vac
Protections and Indicators:
- Overvoltage protection
- AC LED: indicates mains voltage presence
Construction Features:
- Metal enclosure with quick-mount DIN rail clip
- Integrated earth connection
- Configurable negative pole grounding option
- Series or parallel connection capability (up to 4 units of the same model on models equipped with the “Easy Parallel” jumper: SW14AMFL, SW25AMFL, SW14ABF, SW25AF3F, SW7AMF48, SW12AMF48, SW20AMFL12)
Standards and Certifications:
-
- CE compliance (EMC, LVD directives)
- Components selected according to internationally recognized standards, ensuring high reliability and technical compatibility for industrial applications
Compact Dimensions
The high efficiency of semi-resonant switching technology has enabled size reduction of up to 50% compared to traditional linear power supplies, ensuring compact footprint without compromising performance or reliability.
The compact design optimizes space in electrical panels and simplifies installation in space-constrained configurations.
Manual Reset Mode
In the event of a fault, this mode requires interrupting the primary power supply for 1-5 minutes, followed by manual reactivation to restore the output.
Particularly suited for applications where personnel safety is a priority, this function prevents automatic restarts after anomalies, requiring a deliberate and controlled intervention by the operator. The system remains in a safe state until the fault has been checked and resolved.
Manual Reset mode is activated simply by changing the position of the internal jumper.
Key Advantages
Stock versatility: A single product range adaptable to every input voltage (single-phase, two-phase, three-phase) and optimized to handle different output load types, reducing the need to maintain multiple stock items.
Semi-Resonant Switching Technology: Efficiency up to 92%, with continuous power delivery and the ability to handle high instantaneous peaks, ensuring energy efficiency and operational reliability.
Simple and Flexible Parallel Connection
All single-phase, two-phase, and three-phase switching power supplies in the SW series can be connected in parallel to ensure operational continuity (see Redundant 1+1 Configuration).
Models equipped with the “Easy Parallel” jumper (SW14AMFL, SW25AMFL, SW14ABF, SW25AF3F, SW7AMF48, SW12AMF48, SW20AMFL12) also allow up to 4 units to be connected in parallel to increase the total output current, not just for redundancy.
Output balancing occurs automatically through the integrated load-sharing circuit. For optimal performance, verification with a multimeter during initial setup is recommended.
Parallel mode activation with power addition is immediate: simply remove the dedicated jumper.
Power Good – Continuous Output Voltage Monitoring
The output voltage is constantly monitored. A normally open (NO) contact switches when voltage drops below the 20 Vdc threshold, promptly signaling the anomaly.
This “Power Good” signal enables detection of voltage drops that could compromise the operation of powered devices, allowing preventive interventions or automatic switchover to alternative power supply.
Particularly useful in redundant systems or critical applications, where continuous monitoring of power supply status ensures operational continuity and maximum system reliability.
Feature available on most models in the range; check availability on the specific model’s datasheet.
Hiccup Mode
In case of short circuit or overload, the power supply automatically interrupts the output to protect both the device and the load.
The system attempts to restore nominal voltage approximately every 2 seconds, repeating the cycle until the fault is resolved. This active protection prevents permanent damage and allows automatic restart once the anomalous condition is eliminated.
Hiccup mode is activated or deactivated by simply changing the internal jumper position.
Continuous Output Mode
In case of short circuit or overload, the output current is maintained at maximum even when voltage drops to zero. This function is essential for powering heavy loads such as motors, solenoids, lamps, PLCs with high input capacitive loads, and devices requiring high current transients during startup.
The mode is activated by simply changing the internal jumper position, allowing the power supply to support current peaks without interrupting power delivery and preventing malfunctions or unexpected shutdowns.
Output Protected by Circuit Breakers
The output can be easily and safely isolated using magnetic-thermal circuit breakers. In case of fault, the defective section is quickly disconnected, isolating the problem and allowing critical system sections to continue operating without interruptions.
SW power supplies provide 50% additional current above nominal rating, in compliance with IEC 60204-1 standard, which requires safe control under all overload and short circuit conditions, ensuring prompt intervention of magnetic-thermal protections.
Power Boost Mode
This function allows the power supply to handle current peaks of up to 150% of rated power for at least 3 minutes, making it possible to use a smaller-sized power supply for loads with high inrush transients at start-up, such as motors, solenoids, lamps, and capacitive loads.
Without the Power Boost function, the power supply would need to be oversized based on the peak current rather than the load’s nominal current, resulting in higher costs and larger dimensions.
The function is available automatically on all models in the range, with no configuration required.
Datasheet and Manuals
| Code | Input | Output | Datasheet | Manual | Catalog | Technical Curves |
|---|---|---|---|---|---|---|
| SW2.5AMF | 115-230Vac | 2A (115) 3A (230) |
||||
| SW5AMFL | 115-230Vac Selectable Input |
5A | ||||
| SW7.5AMFL | 115-230Vac Selectable Input |
7,5A | ||||
| SW14AMFL | 115-230Vac Selectable Input |
14A | ||||
| SW25AMFL | 115-230-277Vac Selectable Input |
25A | ||||
| SW2.5AMF does not have a manually selectable input | ||||||
| Code | Input | Output | Datasheet | Manual | Catalog | Technical Curves |
|---|---|---|---|---|---|---|
| SW5ABF | 230-400-500Vac Selectable Input |
5A | ||||
| SW7.5ABF | 230-400-500Vac Selectable Input |
7,5A | ||||
| SW14ABF | 230-400-500Vac Selectable Input |
14A | ||||
| SW25AF3F | 400-500Vac 3xVac |
25A | ||||
More Info
Parallel Power Supplies for 1+1 Redundancy and Increased System Availability
Power supplies can be connected in parallel to achieve a 1+1 redundant configuration, ensuring operational continuity in case of unit failure. In this configuration, if one power supply fails, the second automatically takes over supporting the entire load without interruptions.
Implementation Method:
The simplest redundant system consists of two power supplies in parallel with power equal to or greater than the nominal load. Both power supplies operate normally in load-sharing mode, ensuring complete redundancy.
Limitations to Consider:
- Fault Diagnostics: A faulty power supply may be difficult to identify immediately, as the power LED remains on even in the presence of internal malfunctions that do not cause complete shutdown.
- Uncovered Critical Faults: The 1+1 configuration does not protect against all types of faults. In case of internal short circuit on the secondary side, the faulty power supply becomes a parasitic load for the functioning unit, causing voltage drop or overload that may compromise the entire system.
Recommendation: For critical applications where these scenarios represent an unacceptable risk, the use of the Redundancy Module RD220, equipped with decoupling diodes, is recommended to ensure automatic isolation of the faulty unit and truly complete redundancy.
Parallel connection of switching power supplies with redundancy function to ensure continuous power in case of failure.
Single-phase, two-phase, and three-phase switching power supplies can be connected in series to obtain higher output voltages, with the following mandatory requirements:
Technical Limitations:
- Maximum total voltage: 150 Vdc (sum of output voltages)
- Mandatory usage: power supplies of the same model and power rating
- Reverse voltage protection: required to prevent damage from decelerating motors or discharging batteries
Safety Requirements:
- Voltages above 60 Vdc: do not fall under SELV (Safety Extra Low Voltage) category and require protection against direct contact
- Mandatory grounding: when total voltage exceeds 60 Vdc, one of the output poles must be grounded to ensure operator safety
Installation Requirements:
- Minimum spacing: 15 mm between adjacent units (left/right side) to ensure adequate ventilation
- Arrangement: avoid vertical stacking (mount side-by-side only)
Reverse Voltage Protection:
To ensure proper operation, it is necessary to prevent reverse voltages generated by inductive loads (decelerating motors) or discharging batteries, which could damage the power supplies. Installation of blocking diodes or dedicated protection modules is recommended.
Standard
Compliance: Designed according to EN IEC 61010-2-201:2018 — Safety requirements for electrical equipment for measurement, control, and laboratory use.
Input/Output Separation: SELV and PELV for safe operation. Double or reinforced insulation.
EMC Immunity: EN 61000-6-2 (Industrial)
Compliant with: EN 61000-4-2, EN 61000-4-3, EN 61000-4-4, EN 61000-4-5, EN 61000-4-6, EN 61000-4-8, EN 61000-4-11.
Compliant with emission and power quality standards EN 61000-6-4 (industrial emissions).
Machine and Electrical Equipment Safety: EN 60204-1
CE marked in accordance with EMC Directive 2014/30/EU and Low Voltage Directive 2014/35/EU
Primary Side: The unit is equipped with an internal fuse. If it blows, a fault is likely, and the unit should be inspected by the manufacturer. In two-phase models, there are two fuses.
Secondary Side: Automatic protection against overload, overvoltage (typically 35 V DC), and short-circuit.