Comprehensive Product Summary – PD2401 PoE Device (IEEE 802.3at 24W)

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### 1. Product Overview

Product Name: PD2401
Model Number: PD2401
Series: PoE Device Module Series (IEEE 802.3at Class 4)
Article Number: PD2401
Manufacturer: Rayon Technology Co., Ltd.
Product Type: Power over Ethernet (PoE) Powered Device Module
Description: Compact, high-efficiency IEEE 802.3at-compliant PoE device module providing up to 24W output power for integration into network-enabled equipment.
Manufacturer Address:
2F, No. 177, Chung Shan 2 Rd., Lu Chou City, Taipei Hsien, Taiwan
Contact:
Tel: +886-2-82858362
Fax: +886-2-82857065
Email: rayon@ms1.hinet.net
Web: [www.rayontech.com](http://www.rayontech.com)

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### 2. Key Features

- IEEE 802.3at PD Class 4 Compliance: Fully compliant with IEEE 802.3at (PoE+) standard, supporting up to 24W of delivered power.
- Backward Compatibility: Compatible with IEEE 802.3af power sourcing equipment (PSE), ensuring interoperability with existing PoE infrastructure.
- High Output Power: Provides up to 1.9A at 12.5VDC, suitable for medium-power network devices such as wireless access points, IP cameras, and VoIP terminals.
- Wide Input Voltage Range: Accepts 36VDC to 57VDC input, allowing flexible operation with various PoE injectors and switches.
- Compact PCB Design: Small footprint of 2.54 cm × 7.4 cm (25.4 mm × 74 mm) for easy integration into embedded systems and compact enclosures.
- Advanced Auto-Sensing Algorithm: Automatically detects and negotiates power from IEEE 802.3at-compliant PSEs, ensuring safe and efficient power delivery.
- Event Classification Support: Includes D4.1 Event Classification Indication pin for accurate power classification and system diagnostics.
- Short Circuit Protection: Built-in protection circuitry ensures device safety and reliability under fault conditions.
- Thermal Operating Range: Designed for industrial and commercial environments with an operating temperature range of -15°C to +50°C.
- Cost-Effective Integration: Eliminates the need for separate power cabling, reducing installation complexity and cost for networked devices.
- Ease of Integration: Designed for direct PCB integration into PoE-capable devices, simplifying product development for OEMs.

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### 3. Technical Specifications

| Parameter | Specification |
|----------------|-------------------|
| Model | PD2401 |
| Standard Compliance | IEEE 802.3at (PoE+), backward compatible with IEEE 802.3af |
| Power Classification | PD Class 4 |
| Input Voltage Range | 36VDC – 57VDC |
| Output Voltage | 12.5VDC |
| Maximum Output Current | 1.9A |
| Maximum Output Power | 24W |
| Protection Features | Short circuit protection, overcurrent protection |
| Event Classification | D4.1 Event Classification Indication pin |
| Operating Temperature | -15°C to +50°C |
| Physical Dimensions | 25.4 mm (W) × 74 mm (L) |
| Form Factor | Compact PCB module |
| Material | High-quality PCB substrate (Rayon standard) |
| Mounting Type | Embedded PCB integration |
| Manufacturer | Rayon Technology Co., Ltd. |
| Country of Origin | Taiwan |

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### 4. Functionality

The PD2401 functions as a Powered Device (PD) module within a Power over Ethernet system. It receives DC power and data over a single Ethernet cable from a Power Sourcing Equipment (PSE) such as a PoE switch or injector. The module then converts the received power into a regulated 12.5VDC output, which can be used to power internal circuitry or external devices.

Operational Process:
1. Detection and Classification: The PD2401 uses an advanced auto-sensing algorithm to detect the presence of a compliant PSE. It communicates its power class (Class 4) to the PSE using IEEE 802.3at classification signaling.
2. Power Negotiation: Once classification is complete, the PSE supplies the appropriate voltage (typically 48VDC nominal) over the Ethernet cable.
3. Power Conversion: The PD2401 converts the incoming 36–57VDC to a stable 12.5VDC output, capable of delivering up to 1.9A.
4. Protection and Regulation: Integrated short circuit and overcurrent protection ensure safe operation under varying load conditions.
5. Output Delivery: The regulated DC output can be used to power network devices such as wireless access points, IP cameras, VoIP phones, or embedded controllers.

Typical Applications:
- Wireless LAN access points (WLAN APs)
- IP surveillance cameras
- VoIP telephones and video phones
- Networked sensors and controllers
- Industrial Ethernet devices
- Embedded systems requiring PoE power input

Compatibility:
- Compatible with IEEE 802.3at and IEEE 802.3af PSEs
- Works with Rayon’s PoE injectors (FPI400, FPI401, GPI4000, GPI4001) and PoE switches (GPS8075, GPS8180)
- Integrates seamlessly with Rayon’s PoE splitters (SP1301, SP2401) for non-PoE device adaptation

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### 5. Components & Accessories

Included Components:
- PD2401 PoE device module (bare PCB form)
- Integrated classification and protection circuitry

Optional Accessories and Related Products:
- PD1301: 13W PoE device module (IEEE 802.3af Class 0) for lower power applications.
- SP1301: 13W Gigabit PoE power splitter for converting PoE to 12.5VDC for non-PoE devices.
- SP2401: 24W Gigabit PoE power splitter compatible with IEEE 802.3at Class 4.
- FPI400 / FPI401: PoE injectors for 10/100 Mbps networks (Power over Spare Lines).
- GPI4000 / GPI4001: PoE injectors for 10/100/1000 Mbps networks (Power over Data Lines).
- GPS8075 / GPS8180: PoE switches supporting multiple PoE ports with total power budgets of 75W and 180W respectively.

Connectors and Interfaces:
- RJ45 Ethernet interface (via host device integration)
- DC output terminals for 12.5VDC power delivery
- Classification indication pin (D4.1)

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### 6. Installation & Setup

Integration Requirements:
- Designed for direct PCB integration within host devices.
- Requires connection to an RJ45 Ethernet interface capable of receiving PoE power.
- Must be connected to a compliant IEEE 802.3at or 802.3af PSE (PoE switch or injector).

Mounting Options:
- Embedded mounting on device mainboard or daughterboard.
- Compact size allows installation in space-constrained enclosures.

Configuration Steps:
1. Electrical Integration: Connect the PD2401 input lines to the Ethernet transformer center taps or PoE input circuitry.
2. Output Connection: Route the regulated 12.5VDC output to the device’s power input rail.
3. Classification Pin Setup: Optionally connect the D4.1 event classification pin for system-level power management or monitoring.
4. Testing: Verify voltage levels and ensure correct detection by the PSE before full system deployment.

Environmental Considerations:
- Ensure adequate ventilation within the device enclosure to maintain operation within the -15°C to +50°C range.
- Avoid exposure to moisture or corrosive environments.

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### 7. Performance & Capabilities

Power Delivery:
- Maximum Output Power: 24W (sufficient for most mid-power network devices).
- Output Voltage Regulation: Maintains stable 12.5VDC under varying load conditions.
- Efficiency: Optimized for low power loss and high conversion efficiency typical of IEEE 802.3at PD modules.

Electrical Performance:
- Input Voltage Range: 36–57VDC ensures compatibility with standard PoE voltage levels.
- Output Current: Up to 1.9A continuous.
- Protection: Automatic short circuit and overcurrent protection prevent damage to both the PD2401 and connected equipment.

Operational Reliability:
- Temperature Range: -15°C to +50°C ensures reliable operation in indoor and light industrial environments.
- Auto-Sensing: Automatically detects and negotiates with compliant PSEs, preventing accidental power draw from non-PoE sources.

Limitations:
- Designed for IEEE 802.3at Class 4 applications; not suitable for devices requiring more than 24W.
- Requires integration into a host device; not a standalone external module.

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### 8. Standards & Compliance

Industry Standards:
- IEEE 802.3at (PoE+) – Defines power delivery up to 25.5W per port.
- IEEE 802.3af (PoE) – Backward compatibility for up to 15.4W per port.

Electrical Safety and Protection:
- Integrated short circuit and overcurrent protection circuits.
- Designed to meet standard PoE safety isolation and surge requirements.

Environmental Compliance:
- Manufactured in accordance with RoHS (Restriction of Hazardous Substances) guidelines.
- Complies with standard environmental and electromagnetic compatibility (EMC) requirements for network equipment.

Quality Assurance:
- Produced under Rayon Technology’s quality management system ensuring consistent performance and reliability.

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### 9. Additional Information

Warranty:
Standard manufacturer warranty provided by Rayon Technology Co., Ltd. (terms vary by region and distributor).

Technical Support:
- Direct technical assistance available via email or phone.
- Documentation and integration guides available from Rayon’s official website.

Maintenance:
- The PD2401 is a solid-state module requiring minimal maintenance.
- Periodic inspection of solder joints and connectors recommended in high-vibration environments.

Firmware/Hardware Updates:
- As a hardware-only module, no firmware updates are required.
- Future revisions may include enhanced efficiency or extended temperature range.

Product Line Context:
The PD2401 is part of Rayon’s comprehensive PoE ecosystem, which includes:
- PD Modules (PD1301, PD2401): For integrating PoE power into new device designs.
- PoE Splitters (SP1301, SP2401): For adapting non-PoE devices to PoE networks.
- PoE Injectors (FPI400, FPI401, GPI4000, GPI4001): For adding PoE capability to existing network infrastructure.
- PoE Switches (GPS8075, GPS8180): For building complete PoE-enabled network environments.

Use Case Integration Example:
In a new network deployment, a GPS8075 PoE switch can supply power and data to multiple PD2401-integrated devices such as wireless access points or IP cameras. For legacy devices without PoE capability, SP2401 splitters can be used to extract 12.5VDC power from the same Ethernet line, ensuring a unified and efficient power distribution system.

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### Summary

The Rayon PD2401 is a compact, high-performance Power over Ethernet (PoE) device module designed for seamless integration into network-enabled equipment requiring up to 24W of power. Fully compliant with IEEE 802.3at Class 4, it supports a wide input voltage range (36–57VDC) and delivers a stable 12.5VDC output at 1.9A. Its advanced auto-sensing algorithm, short circuit protection, and D4.1 event classification make it a robust and reliable choice for OEMs developing PoE-capable products.

With its small PCB footprint (25.4 × 74 mm), broad compatibility, and industrial-grade operating range (-15°C to +50°C), the PD2401 offers a cost-effective and efficient solution for integrating PoE functionality into modern network devices. Supported by Rayon Technology’s comprehensive PoE ecosystem—including injectors, splitters, and switches—the PD2401 enables flexible, scalable, and power-efficient network designs for both new and existing installations.