1. Product Overview
The Emerson ER4830/S is a high-efficiency communication power module designed for reliable power delivery in server and desktop applications. This module provides a stable -48V DC output with a maximum power of 1740W, ensuring consistent performance for critical systems. It features a non-modular design and includes a single fan for cooling.

2. Safety Information
Please read and understand all safety instructions before installing or operating the power module. Failure to follow these instructions may result in electric shock, fire, or damage to the equipment.
- Ensure the power module is installed by qualified personnel.
- Always disconnect the power source before performing any installation, maintenance, or troubleshooting.
- Do not operate the module in wet or damp conditions.
- Ensure proper ventilation to prevent overheating.
- Do not open the power module casing; there are no user-serviceable parts inside.
- Verify that the AC input voltage and frequency match the specifications of the power module.
3. Package Contents
The package typically includes:
- Emerson ER4830/S 1740W Communication Power Module
- Basic documentation (if applicable)
Note: Additional cables or accessories may be sold separately.
4. Specifications
Refer to the product label for detailed electrical specifications and pin assignments.

| Feature | Specification |
|---|---|
| Model Number | ER4830/S |
| AC Input | 200-250V~12A, 50/60Hz |
| DC Output | -48V === 1740W MAX |
| Fans | 1 |
| D-type Bus Number | 2 |
| CPU Power Connector | 8 pin + 4 pin |
| Interface Type | 20 + 4Pin |
| Application | Server, Desktop |
| Modular | Non-Modular |
| 80 PLUS Certification | Other Certification |
| Certification | NONE |
| Origin | Mainland China |
| Product Status | Refurbished |
| Weight (approx.) | 3.0 kg |
| Dimensions (approx.) | 18 cm (L) x 12 cm (W) x 6 cm (H) |
5. Installation and Setup
Follow these steps for proper installation of the ER4830/S power module:
- Preparation: Ensure the system where the power module will be installed is powered off and disconnected from all power sources.
- Mounting: Carefully slide the power module into its designated slot in the communication rack or server chassis. Ensure it is securely seated and latched.
- AC Power Connection: Connect the appropriate AC power cable to the AC input connector on the rear of the module. The label indicates PIN 1: L (Live), PIN 2: N (Neutral), and PIN 3: ⏚ (Ground).
- DC Output Connection: Connect the DC output cables to the DC connector. The label specifies PIN 1: + and PIN 6: -. Ensure correct polarity to prevent damage to connected equipment.
- System Integration: Connect the CPU power connectors (8 pin + 4 pin) and other interface types (20 + 4Pin) to the motherboard or other components as required by your system.
- Power On: Once all connections are secure, reconnect the system to the AC power source and power it on. Observe the indicator lights on the front panel for operational status.

6. Operation
Once installed and powered on, the ER4830/S power module operates automatically to provide stable DC power. The front panel typically includes indicator lights to show the operational status:
- Power Indicator: Illuminates when the module is receiving AC input and providing DC output.
- Alarm/Fault Indicator: Illuminates or changes color to indicate a fault condition (e.g., over-voltage, over-current, over-temperature).
- Fan Status Indicator: May indicate fan operation or failure.
Consult your system's documentation for specific interpretations of these indicators in your setup.
7. Maintenance
Regular maintenance helps ensure the longevity and optimal performance of your power module:
- Cleaning: Periodically clean the exterior of the module, especially the fan intake and exhaust vents, to prevent dust buildup. Use a soft, dry cloth. Do not use liquid cleaners.
- Ventilation: Ensure that the area around the power module has adequate airflow. Blocked vents can lead to overheating and reduced efficiency.
- Cable Inspection: Regularly inspect all power cables and connectors for any signs of wear, damage, or loose connections.
- Environmental Conditions: Operate the module within its specified temperature and humidity ranges.
8. Troubleshooting
If you encounter issues with your ER4830/S power module, consider the following basic troubleshooting steps:
- No Power:
- Check if the AC power cable is securely connected to both the module and the power outlet.
- Verify that the power outlet is functional.
- Ensure the system's main power switch is in the 'On' position.
- Fault Indicator On:
- Immediately power off the system and disconnect the AC input.
- Check for any obvious signs of damage or loose connections.
- Ensure the module is not overloaded. Disconnect non-essential loads and try again.
- Verify proper ventilation; the module might be overheating.
- Fan Not Operating:
- Check for obstructions in the fan's path.
- If the fan indicator shows a fault, the fan may need replacement. Contact support.
If the problem persists after these steps, contact technical support.
9. User Tips
- For optimal performance and longevity, ensure the power module is installed in a well-ventilated area, especially when used in high-density server environments.
- Always use high-quality, appropriately rated power cables for both AC input and DC output connections.
- Consider using a UPS (Uninterruptible Power Supply) for the AC input to protect the module and connected equipment from power fluctuations.
10. Warranty and Support
For warranty information and technical support, please refer to the documentation provided by your seller or contact the seller directly. Keep your purchase records handy when seeking support.





