Introduction: Reliable 24V Power for Critical Control Systems
The 6EP1333-2BA20This SITOP PSU100S stabilized power supply converts 120/230 V AC input into a regulated 24 V DC output at 5 A. It is designed to keep PLCs, sensors, and actuators running smoothly, even under demanding industrial conditions.
Part of the proven SITOP PSU100S family, this unit offers automatic range selection for the AC supply voltage. It handles both 120 V and 230 V systems without manual switching, simplifying installation and reducing setup errors. With a compact 50 × 125 × 120 mm enclosure, it fits easily into standard control cabinets.
Key Features and Technical Specifications of the 6EP1333-2BA20
Engineers need precise data to design reliable systems. The 6EP1333-2BA20 delivers with a comprehensive set of specifications that ensure predictable performance.
- Input voltage: 85 ... 132 V AC (at 120 V) and 170 ... 264 V AC (at 230 V) – automatic range selection.
- Output voltage: 24 V DC rated, adjustable from 22.8 ... 28 V via potentiometer.
- Output current: 5 A rated, with a range of 0 ... 6 A (up to +45 °C; derating 1.6%/K above +60 °C).
- Line frequency: 47 ... 63 Hz – suitable for global use.
- Efficiency: 88% typical – reduces energy loss and heat generation.
- Buffering time: ≥20 ms at rated output current, ensuring ride-through during brief mains interruptions.
- Short-circuit protection: Constant current characteristic, with current limitation set to 6 ... 7.1 A.
- Galvanic isolation: Yes, with safety extra-low output voltage per EN 60950-1 and EN 50178.
- Protection class: IP20 – suitable for indoor, controlled environments.
- Certifications: CE, UL, CSA, UKCA, EAC, CB – see full list in datasheet.
One distinctive spec is the overload capability: it can deliver 150% of rated current for up to 5 seconds per minute. This helps prevent nuisance trips when motors or solenoids briefly draw extra current during startup.
Installation and Mounting: Simple and Flexible
Mounting the 6EP1333-2BA20 is straightforward. It snaps onto a standard DIN rail EN 60715 (35x7.5/15). The required spacing is 50 mm top and bottom, with 0 mm left and right, allowing side-by-side mounting without additional clearance. This saves valuable cabinet space.
Electrical connections use screw terminals. The input accepts L, N, and PE wires from 0.5 to 2.5 mm² (single-core or finely stranded). The output provides two terminals each for + and -, also 0.5 to 2.5 mm². For the alarm relay contact, two additional terminals are available. Always follow the manufacturer's manual for proper wiring and torque settings.
Maintenance and Reliability: Built to Last
Reliability is critical in industrial automation. The 6EP1333-2BA20 boasts an MTBF of 1,998,441 hours at 40 °C, indicating a long service life. Its design includes protection against overvoltage (Vout < 33 V in case of internal fault) and short-circuit proof output. These features minimize the risk of damage to both the power supply and the connected load.
Routine maintenance is minimal. Periodically inspect the unit for dust accumulation, ensure ventilation paths are clear, and verify that all terminal connections remain tight. Check the green LED for 24 V OK status and the relay contact for proper signaling. Follow the manufacturer's guidelines for any cleaning or servicing.
Solving Real-World Problems: Voltage Stability and Load Transients
Industrial power grids are not perfect. Voltage sags, surges, and frequency variations can disrupt sensitive electronics. The 6EP1333-2BA20 handles these challenges with a relative control precision of 0.1% for slow input voltage fluctuations and 1% for slow load changes. For rapid input fluctuations of ±15%, the output voltage remains within 0.3% typical. This stability ensures that connected equipment sees a clean, consistent DC supply.
Load steps are another common issue. When a large motor starts or stops, the current demand can change abruptly. This power supply responds to a 10/90/10% load step with a settling time of just 1 ms typical. The output voltage overshoot during switch-on is less than 3%, protecting downstream components from voltage spikes.
Compatibility and Integration
The 6EP1333-2BA20 is designed to work with a wide range of industrial loads. Its isolated output ensures safe operation with grounded or ungrounded systems. The relay contact (NO contact, rated 60 V DC/0.3 A) provides a clean signal for monitoring the output voltage status, which can be wired to a PLC input for remote diagnostics.
For higher power requirements, up to two units can be paralleled to increase output current. This flexibility allows you to scale your power architecture as needed. Always consult the datasheet for proper paralleling procedures.
Troubleshooting Common Issues
If the output voltage is missing, first check the input power. Verify that the AC supply is within the specified range (85–132 V or 170–264 V). If the green LED is off, the unit may be in overload or short-circuit condition. The constant current characteristic limits the current to 6–7.1 A, protecting the unit. After removing the fault, the output should recover automatically.
If the output voltage is low, adjust the potentiometer to the desired value (22.8–28 V). Ensure that the load does not exceed the rated current, especially at elevated temperatures. Above +60 °C, derating applies (1.6%/K), so reduce the load accordingly.
Availability and Support
The 6EP1333-2BA20 is available from AutoDCSTech. We stock this Siemens power supply and can ship it promptly to support your operations. For technical questions or to verify lifecycle status, contact our team.
Availability & Condition at AutoDCSTech
| Part Number | 6EP1333-2BA20 |
|---|---|
| Availability | In Stock |
| Condition | New |
| Warranty | One Year |
| Origin | Germany |
