Technical Specifications
| Parameter | Value |
|---|---|
| Product Model | 6EP1334-3BA00 |
| Manufacturer | Siemens |
| Product Type | SITOP PSU100S Single-Phase Power Supply |
| Rated Output Voltage | 24 V DC (adjustable 24–28.8 V) |
| Rated Output Current | 20 A |
| Rated Output Power | 480 W |
| Input Voltage | 120/230 V AC (auto-select, single-phase) |
| Input Frequency | 50/60 Hz |
| Efficiency | up to ~93% |
| Output Voltage Adjustment | Via front potentiometer |
| Parallel Operation | Yes (for redundancy / capacity) |
| Protections | Short-circuit, overload, over-temperature, input surge |
| Signaling | DC OK LED; selectable 24 V / 48 V signaling contact |
| Operating Temperature | –25 °C to +70 °C (derating above 60 °C) |
| Dimensions (W×H×D) | approx. 70 × 125 × 125 mm (check datasheet) |
| Mounting | DIN rail (TS 35) |
| Protection Class | IP20 |
| Weight | approx. 0.9 kg |
| Certifications | CE, UL, cUL, CE (typical SITOP PSU100S set) |
Main Features and Advantages
Mid-capacity cabinet standard: The Siemens 6EP1334-3BA00 hits the 20 A / 480 W bracket that fits the majority of S7-1200/1500 cell cabinets—one CPU, a handful of ET 200 slices, an HMI, a few safety modules, and some field I/O. Ten amps is often too tight once you add servo drives or profibus repeaters; forty amps is overkill and burns double the DIN width. The Siemens 6EP1334-3BA00 lands in the middle with a single 70 mm wide slice, keeping cabinet real estate and BOM cost balanced.
High efficiency, low heat: At ~93% typical efficiency, the Siemens 6EP1334-3BA00 wastes under 7% of incoming AC as heat—important in sealed cabinets or tropical plants where every watt of PSU dissipation nudges the internal temp toward the 60 °C derating knee. Less heat also means the fanless metal enclosure stays quiet and the electrolytic capacitors age slower, extending the service life of the Siemens 6EP1334-3BA00 beyond the 5–7 year typical for lower-tier switched-mode supplies.
Adjustable 24–28.8 V output: The front pot on the Siemens 6EP1334-3BA00 isn’t just a gimmick. On long 24 V homeruns to valve terminals or remote I/O drops, cable IR drop can pull a nominal 24.0 V down to 22.8 V at the far device—borderline for some sensor specs. Cranking the Siemens 6EP1334-3BA00 to 26–27 V at the source compensates that drop while staying within the 28.8 V upper bound that 24 V-class devices tolerate. This “cable-drop pre-comp” is one of the most-used features on SITOP installs.
Robust protection suite: Short-circuit, overload, and overtemperature are baseline, but the Siemens 6EP1334-3BA00 also carries input-surge tolerance suited to industrial mains (where contactor coil switching and motor starts throw ring waves). The PSU folds back gracefully rather than latching off hard, so a momentary overload (e.g., inrush from multiple contactors closing) self-recovers without a technician trip to the cabinet—a small but real uptime win.
DC OK + signaling contact: The green LED is obvious; the selectable 24 V / 48 V floating signaling contact is the part integrators actually use. Wire it to a spare DI on the S7-1500 or to a watchdog relay, and the Siemens 6EP1334-3BA00 can raise a “PSU fault” alarm on the HMI before the 24 V rail collapses into undervoltage. That early warning lets maintenance swap the Siemens 6EP1334-3BA00 during a planned pause instead of a crash-stop.
SITOP ecosystem native: The Siemens 6EP1334-3BA00 isn’t a standalone PSU—it’s the anchor for the SITOP extension stack. Snap a SITOP BUFFER (capacitor-backed) downstream for >40 ms ride-through during mains blips; add a SITOP REDUNDANCY module for 1+1 parallel PSUs; or put a SITOP SELECT upstream for fused/diagnosable branch feeds. None of those require custom wiring on the Siemens 6EP1334-3BA00—they DIN-snap and terminal-match natively.
