Table of Contents
2. Meanwell Series Comparison for Industrial Switches
3. Recommendations for Industrial Switches
4. Velolan Networks: Your Meanwell Power Partner
Industrial networks form the critical backbone of modern automation, manufacturing, and infrastructure. At the heart of these networks lie rugged industrial switches, demanding reliable, clean, and continuous power. Selecting the appropriate power supply unit (PSU) is paramount for ensuring uptime and longevity. Meanwell, a globally recognized leader in power solutions, offers a range of industrial-grade DIN rail power supplies perfectly suited for this task. As a proud distributor of Meanwell, Velolan Networks provides expert guidance and supply for their DNR, HDR, SDR, and MDR series. Here's how to choose the right one for your industrial switches.
Key Selection Criteria
Output Voltage & Current (Wattage):
Match the Switch Requirement: Determine the required input voltage (most commonly 24VDC or 48VDC) and maximum current/power consumption of your switch(es). Check the switch datasheet carefully.
Headroom is Crucial: Never select a PSU operating at its absolute maximum rating. Apply a derating factor (typically 20-30% minimum for industrial environments). If your switch consumes 80W max, choose a PSU rated for at least 100W (80W / 0.8) or higher.
Consider Future Expansion: Allow capacity for adding PoE ports, modules, or future switch upgrades.
Redundancy (N+1):
Critical for Uptime: For mission-critical networks, implement a redundant power setup using two (or more) PSUs. If one fails, the other(s) seamlessly take the full load.
Requires Parallel Operation & Diodes: Ensure the chosen Meanwell series supports parallel operation (most do, like DNR/HDR/SDR). You must use external redundancy modules (diodes) like Meanwell's RDN-40 or RDN-120 to prevent back-feeding and isolate failed units.
Operating Temperature:
Industrial Environments are Harsh: Control cabinets can get very hot. Select a PSU with an operating temperature range exceeding your worst-case ambient temperature. Meanwell's industrial series typically offer wide ranges (e.g., -25°C to +70°C). Remember, derating applies significantly at higher temperatures – consult the derating curve in the datasheet.
Form Factor & Cooling:
DIN Rail Mounting: All these series are designed for standard TS-35/7.5 or TS-35/15 DIN rails.
Size Matters: Consider the available panel space.
Slim Profile: SDR series (22.5mm width) is ideal for space-constrained cabinets.
Standard Profile: DNR, HDR, MDR series have wider profiles (e.g., 70-124mm) but offer higher power density or specialized features.
Cooling: HDR series use fan cooling for high power density in a compact size (be mindful of fan noise/longevity). DNR, SDR, and MDR series are convection-cooled (fanless), preferred for silent operation and higher reliability in dusty environments.
Certifications & Protection:
Industrial Standards: Ensure the PSU carries relevant safety (UL/cUL, TÜV, CE), EMC (FCC, EN), and industrial (EN 62477-1 OVC III) certifications.
Robust Protections: Look for comprehensive protection: Overload (OLP), Over Voltage (OVP), Short Circuit (SCP), and Over Temperature (OTP).
Input Voltage Range:
Wide AC Input (90-264VAC or 85-305VAC): Essential for stability in areas with fluctuating mains voltage or different global standards. All Meanwell industrial series offer wide input ranges.
Meanwell Series Comparison for Industrial Switches
Feature | DNR Series | HDR Series | SDR Series | MDR Series (Medical/Industrial) |
Power Range | 15W - 480W | 100W - 1500W | 15W - 240W | 60W - 350W |
Cooling | Convection (Fanless) | Forced Air (Fan) | Convection (Fanless) | Convection (Fanless) |
Profile | Standard | Standard (High Density) | Ultra-Slim (22.5mm) | Standard |
Key Strengths | Cost-effective, Reliable, Wide range | Very High Power Density, Wide range | Space Saving, Fanless | Ultra-Low Leakage, High EMC, Enhanced Safety (60601-1) |
Ideal For Switches | Most standard switches (Low-Med Power) | High-power switches, PoE++ switches, Multiple switches | Space-limited panels, Low-Med Power switches | Sensitive environments, Labs, Enhanced EMC requirements |
Redundancy Support | Yes (with diodes) | Yes (with diodes) | Yes (with diodes) | Yes (with diodes) |
Recommendations for Industrial Switches
Standard Switch (Low-Med Power, Space OK): DNR Series offers the best balance of reliability, cost, and availability for most applications.
High Power/PoE++ Switch or Multiple Switches: HDR Series provides the necessary high wattage in a compact footprint. Be prepared for fan noise/consider airflow.
Space-Constrained Panel: SDR Series is the clear choice with its ultra-slim 22.5mm width, offering fanless reliability where space is premium.
Sensitive Environments / Enhanced EMC/Safety: MDR Series, while designed for medical applications, excels in industrial settings requiring ultra-low leakage current, superior EMC performance, and enhanced safety features.
Velolan Networks: Your Meanwell Power Partner
Choosing the correct Meanwell DIN rail power supply is an investment in the reliability and resilience of your industrial network infrastructure. Velolan Networks, as your trusted Meanwell distributor, offers:
Expert Selection Guidance: Our technical team can help you navigate the specifications and choose the optimal DNR, HDR, SDR, or MDR model for your specific switch and application requirements.
Full Product Range: Access to the complete Meanwell industrial power portfolio.
Reliable Supply Chain: Consistent stock and timely delivery.
Technical Support: Assistance with integration and best practices.
Ensure your industrial switches have the robust, reliable power foundation they deserve. Contact Velolan Networks today to discuss your requirements and source the perfect Meanwell DIN rail power solution.