Product Description – PULS SLR02 Redundancy Module

The PULS SLR02 is a dedicated redundancy module that strengthens the reliability of 24 V DC power systems in demanding industrial environments. It enables two power supplies to operate in parallel while preventing reverse currents, therefore ensuring continuous operation when one unit experiences a fault. Engineers value its MOSFET-based design because it provides a significantly lower voltage drop than traditional diode modules. Moreover, its compact footprint allows easy integration into existing panels without sacrificing valuable DIN-rail space. The module’s high efficiency also helps reduce thermal stress, which supports long-term system stability.

Technical Specifications

Electrical Characteristics
• Input Voltage: 24 V DC nominal
• Input Current: Up to 2 × 10 A 
• Output Current: 20 A continuous
• Voltage Drop: <0.4 V at full load
• Power Dissipation: <6 W at 20 A load
• Efficiency: >97%
• Diode Technology: MOSFET-based isolation

Protection Features
• Reverse Current Isolation: Yes
• Overload Protection: Automatic limitation
• Short Circuit Protection: Yes
• Thermal Protection: Yes, auto-restart
• Electrical Isolation: Input-to-input and input-to-output

Mechanical Characteristics
• Mounting: DIN-rail (EN 60715)
• Dimensions: 46 × 124 × 127 mm
• Weight: 0.5 kg
• Cooling: Natural convection

Environmental / Compliance
• Operating Temperature: −40 °C to +70 °C
• Storage Temperature: −40 °C to +85 °C
• Humidity: 5–95% non-condensing
• Certifications: CE, UL508, CSA, EN60950-1, IEC 61000-3-2
• Protection Class: IP20
• MTBF: >500,000 hours at 40 °C

FAQ

Q1: Can the SLR02 operate with non-PULS power supplies?
Yes, it works with most 24 V DC power supplies as long as current and voltage ratings match.

Q2: How does MOSFET technology improve performance?
It significantly reduces voltage drop and heat generation, improving system efficiency.

Q3: Is the module suitable for redundant PLC power systems?
Yes, it is frequently used to protect PLCs, HMIs, and critical automation devices.

Q4: Can it operate reliably in cold environments?
Yes, it functions from −40 °C to +70 °C, offering excellent temperature resilience.

Q5: Does the unit require active cooling?
No, it uses convection cooling, which enhances long-term reliability.