SIEMENS 6EP1334-3BA00 — Compact 24 V DC Power Supply for SIMATIC S7-1200/1500 Control Systems

Key Features

• 60 W continuous output (2.5 A @ 24 V DC) — Sustains peak loads from multiple digital inputs, small solenoids, or IO-Link masters without derating in most cabinets under 45°C.
• Integrated redundancy diode — Lets you parallel two units (e.g., for failover) without external diodes — a small but real time-saver during commissioning.
• Wide input voltage range (120–230 V AC, 50/60 Hz) — Handles brownouts and dual-voltage sites (like EU/UK or mixed industrial facilities) without manual switching.
• High efficiency (≥ 87%) and low no-load power draw (< 0.8 W) — Reduces cabinet heat buildup over time — something you notice after six months of continuous operation in an unventilated enclosure.
• DIN-rail mounting + screw-terminal wiring — No spring clamps here, but the robust M3 terminals hold up well in high-vibration environments (we’ve seen them on packaging lines with 5+ years of zero terminal loosening).

Technical Specifications

Application Fields

This PSU typically lands in applications where reliability matters more than smart features: small-scale packaging machines, conveyor subsystems, lab automation rigs, and S7-1200-based HVAC controllers. It’s also common in OEM builds where customers need CE-compliant 24 V power without investing in full redundant PSUs like the 6EP1336 series. One customer recently used eight of these across a fleet of mobile test carts — they liked the lack of fan noise and consistent voltage under battery-generator hybrid supply conditions.

SIEMENS 6EP1334-3BA00

Advantages & Value

From a procurement standpoint, the value isn’t in bells and whistles — it’s in predictability. You get Siemens’ build consistency (same PCB layout and component sourcing since ~2015), broad compatibility with S7-1200/1500 backplanes and signal conditioners, and minimal integration overhead. Spare parts are widely stocked globally, and firmware isn’t a concern — there isn’t any. In many cases, swapping in a 6EP1334-3BA00 avoids redesigning the entire power architecture when upgrading from older S7-200 systems. And while it’s not the cheapest 60 W supply on the market, downtime cost analysis usually tips the scale toward Siemens — especially in regulated environments where requalification cycles eat into project timelines.

Installation & Maintenance

Mount it in a standard IP54 or higher control cabinet with ≥ 50 mm clearance above and below for convection cooling. Avoid placing directly beside heat-generating drives — ambient should stay under 45 °C for full-rated output. Wiring: use 1.5 mm² stranded copper (min.) with ferrules; torque terminals to 0.5 N·m. Safety-wise, always isolate both L/N and output before servicing — this unit has no internal discharge circuitry, so output capacitors can retain charge for several seconds after power-down. Maintenance is essentially zero — no filters to clean, no fans to replace. Just visually inspect terminals annually for discoloration or looseness, and verify output voltage every 12–18 months if used in critical loops. No firmware updates exist — and that’s intentional.

Quality & Certifications

Certified to CE (EN 61000-6-2/6-4), UL 508 (Industrial Control Equipment), cULus, and RoHS compliant. Not rated for marine or explosive atmospheres (no ATEX/IECEx). Siemens offers a standard 365-day warranty — straightforward, no registration required. If a unit fails in-field, replacement lead time is typically under one week when in stock; worst-case delivery is capped at 30 days, even during component shortages. We ship via FedEx, UPS, or DHL — all with tracking and insurance included.