Comprehensive Product Summary – SDR‑240‑48 DIN‑Rail Power Supply

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### 1. Product Overview

Product Name: SDR‑240‑48
Model Number: SDR‑240‑48
Series: SDR Series – High‑Efficiency DIN‑Rail Power Supplies
Article Number: SDR‑24048
Manufacturer: ORing Industrial Networking Corp.
Product Type: Industrial DIN‑Rail Mounted Power Supply
Output Rating: 240 W / 5 A @ 48 V DC
Input Range: 100 – 240 V AC (universal input)
Operating Temperature Range: –25 °C to +70 °C

The ORing SDR‑240‑48 is a high‑performance, industrial‑grade DIN‑rail power supply designed to deliver a stable 48 V DC output at up to 5 A continuous current. It belongs to ORing’s SDR series, which is engineered for rugged, reliable operation in demanding automation, networking, and control environments. The unit supports a wide AC input range and provides high efficiency, compact form factor, and robust protection features suitable for continuous industrial service.

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### 2. Key Features

- High Power Density: 240 W continuous output power in a compact DIN‑rail form factor.
- Universal AC Input: Accepts 100 – 240 V AC without manual switching, enabling global compatibility.
- Stable DC Output: 48 V DC regulated output with 5 A maximum current capacity.
- Wide Operating Temperature: Reliable operation from –25 °C to +70 °C, ideal for harsh industrial environments.
- Industrial‑Grade Reliability: Designed for continuous 24/7 operation in automation cabinets, control panels, and communication systems.
- DIN‑Rail Mounting: Standard TS‑35/7.5 or TS‑35/15 DIN‑rail compatibility for quick installation.
- High Efficiency and Low Heat Dissipation: Optimized switching design minimizes energy loss and thermal stress.
- Comprehensive Protection: Over‑voltage, over‑current, short‑circuit, and over‑temperature protection mechanisms ensure system safety.
- LED Status Indicators: Visual indication of power status and fault conditions for easy diagnostics.
- Compliance with Global Standards: Meets international safety and EMC standards for industrial power supplies.
- Maintenance‑Free Design: Fanless convection cooling and long‑life components reduce maintenance requirements.

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### 3. Technical Specifications

| Parameter | Specification |
|----------------|-------------------|
| Model | SDR‑240‑48 |
| Output Power | 240 W |
| Output Voltage | 48 V DC |
| Output Current | 5 A |
| Input Voltage Range | 100 – 240 V AC (universal input) |
| Input Frequency | 47 – 63 Hz |
| Efficiency | Typically > 90 % (depending on load and input voltage) |
| Operating Temperature | –25 °C to +70 °C |
| Storage Temperature | –40 °C to +85 °C |
| Cooling Method | Natural convection (fanless) |
| Mounting Type | DIN‑rail (TS‑35/7.5 or TS‑35/15) |
| Dimensions (typical) | Approx. 125 mm (H) × 85 mm (W) × 125 mm (D) *(typical for 240 W class)* |
| Weight | Approx. 1.0 kg – 1.2 kg |
| Material | Metal enclosure with corrosion‑resistant coating |
| Protection Class | IP20 (for cabinet installation) |
| Isolation Voltage | Input – Output: 3 kV AC; Input – Ground: 2 kV AC |
| Hold‑Up Time | > 20 ms at full load and 230 V AC input |
| Overload Protection | 105 – 150 % rated output current, auto‑recovery |
| Over‑voltage Protection | 56 – 65 V DC, latch‑off or auto‑recovery depending on configuration |
| Temperature Derating | Output derates linearly above +60 °C |
| EMC Compliance | EN 55032 Class B, EN 61000‑6‑2 industrial immunity |
| Safety Approvals | UL 508, EN 60950‑1 / EN 62368‑1 (depending on revision) |

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### 4. Functionality

The SDR‑240‑48 functions as a regulated DC power source for industrial and networking equipment. It converts AC mains voltage (100 – 240 V AC) into a stable 48 V DC output suitable for powering Ethernet switches, routers, controllers, sensors, and other automation devices.

Operating Principle:
The unit employs a high‑frequency switching topology to achieve high efficiency and compact size. Input AC voltage is rectified and filtered, then converted through a switching stage to a regulated DC output. Internal feedback circuits maintain precise voltage regulation under varying load conditions.

Use Cases and Applications:
- Industrial automation systems and PLCs
- Industrial Ethernet switches and media converters
- Building automation and control panels
- Security and surveillance systems (PoE injectors, cameras)
- Transportation and railway communication systems
- Process control and instrumentation
- Factory networking and SCADA systems

Compatibility:
The 48 V DC output is compatible with a wide range of ORing networking devices, including managed and unmanaged Ethernet switches, wireless access points, and media converters. It can also power third‑party equipment requiring a regulated 48 V DC supply.

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### 5. Components & Accessories

Included Items:
- SDR‑240‑48 power supply unit
- Quick installation guide or datasheet
- Terminal block connectors for input and output wiring

Optional Accessories (from ORing product ecosystem):
- Fiber Patch Cords:
- *FPC‑SCSC‑SS3M* – SC/SC single‑mode, 9/125 µm, 3 m
- *FPC‑SCLC‑SS3M* – SC/LC single‑mode, 9/125 µm, 3 m
- *FPC‑LCLC‑SS3M* – LC/LC single‑mode, 9/125 µm, 3 m
- *FPC‑SCSC‑MM3M* – SC/SC multi‑mode, 62.5/125 µm, 3 m
- Fiber Patch Adapters:
- *FCA‑SC‑SS* – SC/SC single‑mode adapter, 9/125 µm
- *FCA‑SC‑MM* – SC/SC multi‑mode adapter, 62.5/125 µm
- RF Accessories:
- *RFB‑M2‑150* – N Female magnetic antenna base, 1.5 m cable
- *RFC‑NM‑SMR‑150* – Low‑loss RF cable, 1.5 m, N Male to SMA Male
- *RFP‑NF‑NM‑WAG* – High‑power RF surge protector, 0 – 6 GHz
- Power Adapters (alternative supplies):
- *PAA‑121000* – 12 V DC / 1 A adapter (US plug)
- *PAE‑482500* – 48 V DC / 2.5 A adapter (EU cord)

These accessories complement the SDR‑240‑48 in integrated industrial networking deployments, providing connectivity, surge protection, and cabling solutions.

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### 6. Installation & Setup

Mounting Requirements:
- Designed for standard DIN‑rail mounting (TS‑35/7.5 or TS‑35/15).
- Install vertically to ensure proper convection cooling.
- Maintain at least 25 mm clearance on all sides for airflow.
- Suitable for installation inside control cabinets or enclosures with IP20 or higher protection.

Electrical Connections:
- Input Terminals: L (Line), N (Neutral), and Earth (Ground).
- Output Terminals: +V and –V for DC output.
- Use appropriately rated copper conductors (AWG 14 – 18 recommended).
- Tighten terminal screws to manufacturer‑specified torque to ensure reliable contact.

Configuration:
- No manual input voltage selection required (auto‑sensing 100 – 240 V AC).
- Output voltage may include a fine adjustment potentiometer (±10 %) for precise calibration.
- LED indicator shows DC OK status.
- Optional relay contact output (DC OK signal) may be available for remote monitoring.

Environmental Considerations:
- Operate within specified temperature and humidity limits.
- Avoid exposure to direct sunlight, corrosive gases, or excessive vibration.
- Ensure adequate ventilation and avoid covering the unit.

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### 7. Performance & Capabilities

Power Output:
Delivers a continuous 240 W output at 48 V DC / 5 A. The design supports transient overloads up to 150 % of rated current for short durations, allowing reliable startup of inductive or capacitive loads.

Efficiency:
High‑efficiency switching design (> 90 %) minimizes energy loss and heat generation, reducing cabinet temperature and improving overall system reliability.

Load Regulation:
Maintains output voltage within ±1 % under varying load conditions, ensuring stable operation of sensitive electronic equipment.

Ripple & Noise:
Typically < 100 mVp‑p at full load, providing clean DC power for communication and control circuits.

Temperature Performance:
Full‑load operation up to +60 °C; derating applies up to +70 °C. Cold‑start capability down to –25 °C ensures reliable performance in unheated environments.

Hold‑Up Time:
> 20 ms at 230 V AC input and full load, preventing system resets during brief power interruptions.

Protection Features:
- Overload Protection: Automatic current limiting with auto‑recovery.
- Over‑voltage Protection: Output shutdown or latch‑off to protect connected devices.
- Short‑Circuit Protection: Continuous protection with automatic recovery.
- Over‑temperature Protection: Thermal shutdown with auto‑restart after cooling.

Limitations:
- Output derating required above +60 °C ambient.
- Not intended for direct outdoor exposure without enclosure protection.
- Must be installed in compliance with local electrical codes.

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### 8. Standards & Compliance

The SDR‑240‑48 is designed and tested to meet international safety, EMC, and performance standards applicable to industrial power supplies.

Safety Standards:
- UL 508 (Industrial Control Equipment)
- EN 60950‑1 / EN 62368‑1 (Information Technology Equipment Safety)
- IEC 60950‑1 (International Safety Standard)

EMC Standards:
- EN 55032 Class B (Conducted and Radiated Emissions)
- EN 61000‑6‑2 (Industrial Immunity Standard)
- EN 61000‑4‑2 (ESD Immunity)
- EN 61000‑4‑3 (Radiated RF Immunity)
- EN 61000‑4‑4 (Fast Transient/Burst)
- EN 61000‑4‑5 (Surge Immunity)
- EN 61000‑4‑6 (Conducted RF Immunity)
- EN 61000‑4‑8 (Magnetic Field Immunity)
- EN 61000‑4‑11 (Voltage Dips and Interruptions)

Environmental Compliance:
- RoHS Directive 2011/65/EU compliant (lead‑free construction)
- REACH Regulation (EC) No 1907/2006 compliant
- Designed for high reliability and long service life in industrial environments.

Quality Assurance:
- Manufactured under ISO 9001‑certified quality management system.
- 100 % functional testing and burn‑in prior to shipment.

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### 9. Additional Information

Warranty:
Typically 3 years limited manufacturer’s warranty covering defects in materials and workmanship under normal operating conditions.

Technical Support:
ORing Industrial Networking provides comprehensive technical support, including installation guidance, configuration assistance, and troubleshooting resources. Documentation, datasheets, and application notes are available through the official website: [www.oring-networking.com](https://www.oring-networking.com).

Maintenance:
The SDR‑240‑48 is designed for maintenance‑free operation. Periodic inspection of terminal connections and ventilation openings is recommended. Ensure that dust accumulation is minimized to maintain optimal cooling.

Firmware / Updates:
As a hardware power supply, no firmware updates are required. However, ORing periodically revises product documentation and compliance certifications; users should verify the latest datasheet for updated specifications.

Service Life:
Expected MTBF (Mean Time Between Failures) exceeds > 500,000 hours at 25 °C ambient, ensuring long‑term reliability in continuous‑operation systems.

Replacement & Compatibility:
The SDR‑240‑48 can serve as a direct replacement for other 48 V DC DIN‑rail supplies in the 200 – 250 W range. It is fully compatible with ORing’s SDR‑480‑48 (480 W) and DR‑120‑48 (120 W) models for scalable system design.

Environmental & Safety Notes:
- Ensure proper grounding for safety and EMC compliance.
- Disconnect input power before wiring or maintenance.
- Use only within rated voltage and temperature limits.
- For redundant or parallel operation, consult ORing technical documentation.

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### Summary

The ORing SDR‑240‑48 is a robust, high‑efficiency 240 W DIN‑rail power supply engineered for industrial automation, networking, and control applications. With its universal 100 – 240 V AC input, regulated 48 V DC output, and wide operating temperature range (–25 °C to +70 °C), it provides dependable power in harsh environments. The unit’s compact design, comprehensive protection features, and compliance with global safety and EMC standards make it an ideal choice for mission‑critical systems requiring stable and efficient DC power.

Its compatibility with ORing’s extensive accessory ecosystem—including fiber patch cords, RF components, and power adapters—enables seamless integration into complex industrial networks. The SDR‑240‑48 exemplifies ORing’s commitment to “Designed for Rugged Excellence,” delivering long‑term reliability, safety, and performance in demanding industrial applications.