The Siemens 6EP1334-3BA00 is a SITOP PSU200M modular switched-mode power supply built for industrial automation cabinets that rely on a stable 24 V DC control voltage. Rated for 10 A output (about 240 W), it is intended to power PLC systems, distributed I/O, sensors, actuators, industrial network components, and HMI devices where uptime and predictable behavior matter more than flashy features. Siemens positions this model as a stabilized 24 V supply with broad AC input capability, a selector switch concept for common mains ranges, and robust overload response suitable for machine-building environments.
What the 6EP1334-3BA00 is designed to do
In a control panel, the 24 V rail is the “circulatory system” for automation electronics. The 6EP1334-3BA00 is designed to deliver regulated DC voltage with tight tolerance, low ripple, and consistent line/load regulation. The datasheet specifies a 24 V nominal output with an adjustable range from 24 to 28.8 V, making it useful when you need to compensate for voltage drop over long cable runs or when you standardize at slightly higher voltage for certain loads while remaining within safe limits.
Just as important as steady-state performance is how the supply behaves during real events: machine startup, solenoid inrush, or a downstream short. This model supports controlled behavior under overload conditions, and Siemens provides operating instructions that describe derating and mounting considerations so the unit can reliably deliver current across typical cabinet temperatures.
Electrical input flexibility for industrial sites
A practical strength of the 6EP1334-3BA00 is its ability to operate on single-phase and two-phase AC and to accommodate different mains voltage classes using a selector switch. Siemens lists typical supply voltage classes 120…230 V AC and 230…500 V AC, and corresponding wide input voltage ranges 85…264 V AC (range 1) and 176…550 V AC (range 2). This is valuable in plants where machines may be deployed across regions or where cabinets may be tied to different upstream distributions.
Key specifications at a glance
| Item | Siemens 6EP1334-3BA00 (SITOP PSU200M) |
|---|---|
| Product family | SITOP PSU200M modular power supply |
| Rated output | 24 V DC, 10 A (approx. 240 W) |
| Output adjustability | 24 to 28.8 V DC |
| Output tolerance (static) | ±3% |
| Residual ripple | < 100 mVpp (listed) |
| Input type | 1-phase and 2-phase AC |
| Input voltage ranges | 85…264 V AC (range 1) / 176…550 V AC (range 2) |
| Setting method | Selector switch on the device |
| Efficiency (commonly listed) | approx. 86% (at nominal values) |
| Protection / enclosure class | IP20 (typical listing) |
Output quality: regulated 24 V for sensitive automation electronics
Industrial control systems often include mixed loads: analog sensors that dislike noise, digital I/O that resets on brownouts, and network devices that are annoyingly sensitive to voltage dips. Siemens specifies regulated DC output behavior with low residual ripple (commonly quoted below 100 mV peak-to-peak) and stable tolerance, which helps reduce intermittent faults that are expensive to diagnose.
The adjustable output range (24–28.8 V) also gives you room to tune the cabinet’s DC bus for your wiring topology. For example, when a cabinet is physically far from a remote I/O island, a small increase in the supply setpoint can preserve the minimum voltage at the far end under load—without adding extra supplies or thicker conductors.
Overload response and protection behavior
Power supplies in machine control are routinely asked to survive “momentary chaos”: contactor pull-in currents, solenoid valve activation, or short-circuit events caused by field wiring issues. Documentation for the SITOP modular 1-phase/2-phase family describes behavior under overload where the output current and output voltage are reduced, which is consistent with a protective response that prioritizes device survival and system recoverability. This matters because a supply that fails hard can take an entire machine down, while a supply that protects itself and provides clear status simplifies maintenance and reduces downtime.
Mechanical integration and cabinet installation
The 6EP1334-3BA00 is intended for fast installation in standard industrial enclosures (the SITOP modular family is widely used for DIN-rail cabinet layouts). Distributor descriptions emphasize a compact design and rugged enclosure suitable for industrial conditions, with mounting hardware intended to remain stable even under vibration.
For best performance, cabinet practice still matters. Siemens operating documentation for the modular 1ph/2ph line includes guidance on mounting position, clearance, and temperature-related derating curves, because convection cooling and ambient temperature directly affect continuous output current capability. If you place power supplies above heat-generating drives or you pack wiring ducts too tightly, you force unnecessary derating and reduce lifetime.
Typical application scenarios
| Application area | Why 6EP1334-3BA00 fits |
|---|---|
| PLC and I/O cabinets | Stable 24 V rail for controllers, DI/DO modules, safety devices |
| Packaging and assembly machines | Handles mixed loads and frequent switching events |
| Industrial networking and HMI |
Clean DC improves reliability of switches, gateways, panels |
| Process skids and OEM panels |
Wide input voltage options simplify global deployment
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Procurement and lifecycle notes
Siemens maintains an official support/product page for 6EP1334-3BA00 that identifies it as SITOP PSU200M 24 V/10 A and provides access to documentation and lifecycle context. For procurement teams, this is useful because it provides a stable reference for technical files (datasheets, manuals) when you are matching equivalents, building BOMs, or validating a replacement strategy for installed cabinets.
Conclusion
The Siemens 6EP1334-3BA00 is a practical, industrial-grade choice when you need a SITOP PSU200M 24 V DC power supply that can deliver 10 A reliably, supports broad AC input ranges via a selector switch, and offers adjustable output voltage for real cabinet wiring conditions. It focuses on the fundamentals that keep automation systems stable: regulated output, low ripple, protective overload behavior, and documented installation guidance for predictable performance in the field.
