1. Introduction
This manual provides essential information for the safe and efficient operation, installation, and maintenance of your Eaton 9SX 3000VA 2700W 120V Online Double-Conversion Uninterruptible Power Supply (UPS). The 9SX series is designed to deliver high-quality, continuous power protection for critical IT applications, medical equipment, light industrial systems, and automation.
The Eaton 9SX UPS ensures perfect output by converting AC input to DC, then reconverting UPS output to fully regulated sine wave AC. This double-conversion technology provides superior protection against power disturbances, including surges, sags, and outages, with zero transfer time to battery mode.
2. Safety Information
WARNING: Before installing or operating the UPS, read and understand all instructions in this manual. Failure to follow these instructions may result in electric shock, fire, or serious injury.
- Ensure the UPS is connected to a properly grounded electrical outlet.
- Do not open the UPS enclosure. There are no user-serviceable parts inside. Refer all servicing to qualified service personnel.
- Avoid installing the UPS in areas with excessive dust, humidity, or extreme temperatures.
- Do not block ventilation openings. Adequate airflow is essential for proper cooling.
- Disconnect the UPS from the AC power source before performing any maintenance or moving the unit.
3. Product Overview
The Eaton 9SX 3000VA UPS is a robust power protection solution featuring advanced online double-conversion technology. It provides continuous, clean sine wave power to connected equipment, safeguarding against a wide range of power quality issues.

Figure 1: Front view of the Eaton 9SX 3000VA UPS, showing the display panel and ventilation grille.
Key Features:
- Online Double-Conversion: Provides the highest level of power protection by continuously converting AC to DC and back to AC, isolating connected equipment from raw utility power.
- Pure Sine Wave Output: Ensures compatibility with all types of sensitive electronic equipment.
- Zero Transfer Time: Seamless transition to battery power during outages, preventing interruptions.
- Advanced Battery Management (ABM) Technology: Extends battery service life by 50% and provides advanced warning for battery replacement.
- Expandable Runtime: Supports connection of up to four external battery modules (9SXEBM96, sold separately) for extended backup duration.
- Cybersecure Network Card Option: The optional NETWORK-M2 card (sold separately) enables remote monitoring, configuration, and management, meeting UL 2900-1 and IEC 62443-4-2 cybersecurity standards.
- Flexible Output Connections: Includes 4 NEMA 5-20R outlets and 1 NEMA L5-30R outlet.
4. Setup
4.1 Unpacking and Inspection
- Carefully unpack the UPS and its accessories.
- Inspect the unit for any shipping damage. If damage is found, do not install and contact your dealer.
- Retain the packaging for future transport or storage.
4.2 Placement
- Place the UPS in a clean, dry, and well-ventilated area.
- Ensure ambient temperature is within the specified operating range (typically 0°C to 40°C / 32°F to 104°F).
- Maintain adequate clearance around the UPS for proper airflow, especially around the front and rear ventilation grilles.
4.3 Connecting to Power
- Connect the UPS input power cord (NEMA L5-30P) to a dedicated, grounded electrical outlet.
- Ensure the input voltage matches the UPS specifications (120V AC).
4.4 Connecting Equipment
- Connect your critical equipment to the UPS output receptacles. The UPS provides 4 NEMA 5-20R outlets and 1 NEMA L5-30R outlet.
- Distribute the load evenly across the outlets if possible.
- For optional remote management, install the NETWORK-M2 card (sold separately) into the expansion port and connect it to your network.
5. Operating Instructions
5.1 Initial Startup
- After connecting the input power and equipment, press and hold the power button on the front panel for a few seconds until the UPS powers on.
- The LCD display will illuminate and show system status, including input/output voltage, load level, and battery charge.
- Allow the UPS to charge its internal batteries for at least 24 hours before relying on it for full runtime.
5.2 Understanding the Display
The front panel LCD provides real-time operational data. Use the navigation buttons (Up/Down arrows, Enter, Esc) to cycle through various screens and access settings.
- Input/Output Voltage: Displays the current AC voltage.
- Load Level: Shows the percentage of the UPS's capacity being used by connected equipment.
- Battery Charge: Indicates the current charge level of the internal batteries.
- Estimated Runtime: Provides an approximation of how long the UPS can power connected equipment during an outage.
- Event Log: Records system events and alarms.
5.3 Power Outage Operation
During a power outage, the UPS will automatically switch to battery power with zero transfer time. The LCD will indicate battery operation, and an audible alarm may sound (configurable).
- Monitor the estimated runtime on the LCD.
- If the outage is prolonged, safely shut down connected equipment before the UPS batteries are depleted.
- The UPS will automatically restart when utility power is restored (if configured to do so).
6. Maintenance
6.1 Battery Maintenance and Replacement
The Eaton 9SX UPS features field-replaceable, hot-swappable internal battery modules. This allows for battery replacement without powering down connected equipment.
- Battery Life: With ABM technology, batteries typically last longer, but regular checks are recommended. The UPS will provide advanced notice when batteries need replacing.
- Replacement Procedure: Refer to the detailed battery replacement guide available on the Eaton support website or contact qualified service personnel. Always use genuine Eaton replacement battery modules.
- Disposal: Dispose of old batteries according to local regulations.
6.2 General Cleaning
- Keep the UPS exterior clean and free of dust. Use a soft, dry cloth.
- Ensure ventilation openings are clear of obstructions.
7. Troubleshooting
This section provides solutions to common issues. For more complex problems, contact Eaton technical support.
| Problem | Possible Cause | Solution |
|---|---|---|
| UPS does not turn on | No input power; Battery deeply discharged | Check AC power connection; Allow UPS to charge for several hours. |
| UPS beeps continuously | On battery mode; Overload condition | Normal during power outage; Reduce connected load. |
| Battery warning on display | Battery nearing end of life | Plan for battery replacement. |
8. Specifications
| Feature | Detail |
|---|---|
| Model Number | 9SX3000 |
| Capacity | 3000VA / 2700W |
| Input Voltage | 120V AC |
| Output Voltage | 100V (Nominal) |
| Input Connector | NEMA L5-30P |
| Output Receptacles | 4 x NEMA 5-20R, 1 x NEMA L5-30R |
| Battery Type | Lead Acid (Field-replaceable, hot-swappable modules) |
| Typical Backup Time | 5.70 minutes (at half load) |
| Dimensions (H x W x D) | 19.69 x 19.69 x 11.02 inches (Product Dimensions) / 22.5"D x 12.5"W x 19"H (Alternative Dimensions) |
| Weight | 83.5 pounds |
| Color | Black |
| Manufacturer | Eaton Corporation |
9. Warranty and Support
Eaton provides comprehensive warranty coverage for its UPS products. For specific warranty terms and conditions, please refer to the warranty card included with your product or visit the official Eaton website.
For technical assistance, troubleshooting, or service requests, please contact Eaton customer support. Have your model number (9SX3000) and serial number ready when contacting support.
Online resources, including FAQs, detailed manuals, and software downloads, are available on the Eaton website.





