Industrial 24V DC Power Supply (5A Rated Capacity)

The Siemens 6EP1333-1LB00 is a professional-grade switched-mode power supply engineered for continuous operation in demanding industrial environments. This unit converts fluctuating AC mains voltage into regulated 24V DC output, providing stable power for programmable logic controllers, distributed I/O systems, sensors, and field devices across manufacturing, process control, and building automation applications.

Designed for system integrators and OEM machine builders who require dependable power infrastructure, this SITOP PSU100L model combines compact dimensions with robust performance. The wide-range AC input eliminates the need for voltage selection switches, while built-in protection circuits safeguard connected equipment against electrical faults. With proven Siemens engineering and global certifications, this power supply ensures reliable operation in installations spanning multiple continents.

Whether you're powering a single control cabinet or designing redundant power architectures for critical processes, the 6EP1333-1LB00 delivers the performance consistency and installation flexibility that modern automation systems demand.

Core Features & Technical Advantages

→ Wide-Range Universal Input (85-264V AC)
Operates seamlessly across global voltage standards without manual configuration. Accepts both 120V and 230V AC mains, plus tolerates ±15% voltage variations and brief brownout conditions. Eliminates inventory complexity for multi-site deployments.

→ Precision Output Regulation (±1% Tolerance)
Advanced feedback control maintains 24V DC output within tight specifications regardless of input fluctuations or load changes. Ensures consistent performance of voltage-sensitive instrumentation and prevents logic errors in control systems.

→ High Power Density (120W in 70mm Width)
Delivers 5A continuous current in a space-efficient form factor that maximizes control panel density. Reduces enclosure size requirements and lowers material costs in OEM applications. Standard 35mm DIN rail mounting enables tool-free installation.

✓ Multi-Layer Protection Architecture
Integrated safeguards include automatic overload shutdown with auto-restart, short-circuit current limiting, overvoltage protection to 35V DC, and thermal management with derating curves. Front-panel LED provides instant status indication.

✓ Extended Operating Range (-25°C to +70°C)
Meets industrial temperature specifications for installation in unheated facilities, outdoor enclosures, and process areas with elevated ambient temperatures. Full output power available up to +60°C without derating.

✓ Global Safety Certifications
Complies with CE, UL508, cULus, GL marine approval, and DNV standards. Meets IEC 61204-3 requirements for PELV (Protective Extra Low Voltage) output, enabling safe installation in hazardous location control panels.

Typical Application Scenarios

Automated Manufacturing Lines
Powers Siemens S7-1200/1500 PLCs, ET200 distributed I/O, and KTP HMI panels in packaging machinery, assembly stations, and material handling systems. The low output ripple (<150mV) prevents communication errors on PROFINET and PROFIBUS networks, while the compact footprint supports dense control cabinet layouts in space-constrained production environments.

Process Industry Instrumentation
Supplies 24V DC to pressure transmitters, flow meters, temperature sensors, and control valve positioners in chemical processing, oil & gas, and water treatment facilities. The wide operating temperature range supports installation in field junction boxes and analyzer shelters, while the high efficiency (>90%) minimizes heat generation in sealed enclosures.

Building Management Systems
Energizes HVAC controllers, lighting control modules, access control panels, and fire alarm interfaces in commercial and institutional buildings. The universal input voltage simplifies specification across international projects, and the PELV-compliant output meets electrical code requirements for low-voltage control circuits.

Machine Tool Control Panels
Provides auxiliary power for CNC machine controls, servo drive logic circuits, and safety relay modules in metalworking and woodworking equipment. The 6A peak current capability handles inrush demands during system startup, while the adjustable output (24-28V) compensates for voltage drop in long cable runs to remote I/O racks.

Technical Parameters & Selection Guide

Selection Criteria: Calculate total current draw of all connected 24V DC devices and add 20% safety margin. For loads exceeding 4A continuous, select this 5A model. For redundant configurations, use SITOP diode modules (6EP1961-2BA00) to parallel multiple units. For applications requiring battery backup, combine with SITOP DC UPS modules (6EP1931 series).

Extended Functions & System Integration

Parallel Operation Capability: Multiple PSU100L units can be connected in parallel using external diode modules to create N+1 redundant power systems. This configuration ensures continuous operation even if one supply fails, critical for processes that cannot tolerate downtime.

Remote Monitoring Integration: When paired with SITOP Manager software and compatible monitoring modules, output voltage, current, and operating status can be transmitted to SCADA systems via PROFINET or Modbus protocols. Enables predictive maintenance and centralized power infrastructure management.

Adjustable Output Voltage: Front-accessible potentiometer allows field adjustment from 24V to 28V DC without tools. Use this feature to compensate for voltage drop in long cable runs (up to 100 meters) or to meet specific equipment voltage requirements within the 24V DC class.

Conformal Coating Option: For installations in high-humidity or corrosive environments, conformal-coated versions are available on request. This protective layer extends service life in coastal facilities, wastewater treatment plants, and chemical processing areas.

Delivery & Service Assurance

Standard Lead Time: In-stock units ship within 1-3 business days via express courier. Custom configurations or bulk orders (>10 units) typically require 2-4 weeks for factory preparation and quality verification.

Warranty Coverage: Each unit includes a comprehensive 12-month manufacturer warranty covering defects in materials and workmanship under normal operating conditions. Extended warranty programs available for critical infrastructure applications.

Technical Support: Our application engineers provide pre-sale sizing assistance, installation guidance, and troubleshooting support via email and phone. Response time for technical inquiries: <24 hours on business days.

Documentation Package: Every shipment includes installation manual, wiring diagrams, dimensional drawings, and certification documents. CAD models (STEP/IGES format) and TIA Portal hardware catalog entries available for download.

Frequently Asked Questions

What is the maximum cable length I can use between this power supply and my PLC?
For 1.5mm² wire, you can run up to 50 meters at full 5A load while maintaining >23V at the load. For longer distances, increase wire gauge to 2.5mm² or adjust output voltage to 26-27V using the front potentiometer to compensate for voltage drop.

Can this unit power 24V DC solenoid valves with high inrush current?
Yes, the 6A peak current capability (3-second duration) handles typical solenoid valve inrush. For applications with multiple valves switching simultaneously, calculate total inrush and ensure it stays below 6A, or use staged switching via PLC outputs.

Does this power supply require forced ventilation in the control cabinet?
No forced cooling needed up to +60°C ambient when mounted with 50mm clearance above and below. Above +60°C, derate output current by 2.5% per degree Celsius, or add cabinet ventilation fans to maintain lower ambient temperature.

Is this suitable for outdoor installation in weatherproof enclosures?
The IP20 rating requires installation inside a protective enclosure. For outdoor applications, mount in NEMA 4X or IP65-rated cabinets with adequate ventilation. The -25°C to +70°C operating range supports most outdoor climate conditions when properly enclosed.

How do I connect this power supply for redundant operation?
Use Siemens 6EP1961-2BA00 diode modules (one per power supply) to OR the outputs together. Connect each PSU output to a diode module input, then parallel the diode module outputs to your 24V DC bus. This prevents reverse current flow if one supply fails.

What maintenance does this power supply require?
The PSU100L is maintenance-free under normal conditions. Recommended annual inspection: verify terminal tightness, check for dust accumulation (clean with dry compressed air), and confirm LED status indication. Expected service life exceeds 10 years in typical industrial environments.

Ready to Upgrade Your Power Infrastructure?

Ensure your automation systems receive the clean, stable power they deserve. Contact our technical sales team for application-specific sizing, volume pricing, or integration support. We're here to help you build reliable industrial control solutions.

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