1. Introduction
Welcome to your new APC BK500 500VA UPS Surge Protector. This device provides reliable power protection for your electronic equipment, safeguarding against power outages, surges, and spikes. It features a 500VA/300W output capacity and includes both battery backup and surge-only outlets. Please read this manual thoroughly before installation and operation to ensure proper use and maximum longevity of your product.

This image illustrates the APC BK500 UPS unit positioned alongside a desktop computer setup, including a monitor and keyboard, demonstrating a typical use case for the device in a home or office environment.
2. Important Safety Instructions
Please observe the following safety precautions to prevent injury or damage to the unit and connected equipment:
- Do not install the UPS in direct sunlight, near heat sources, or in areas with excessive dust or humidity.
- Connect the UPS to a grounded outlet only.
- Do not open the UPS casing. There are no user-serviceable parts inside. Refer all servicing to qualified service personnel.
- Ensure proper ventilation around the UPS. Do not block ventilation openings.
- Disconnect the UPS from the power outlet before cleaning.
- The battery inside the UPS is not user-replaceable. Contact APC support for battery replacement.
3. Package Contents
Verify that all items are present in your package:
- APC BK500 500VA UPS Unit
- Software CD
- Cord Management Straps
- USB Communication Cable
- User Manual (this document)
4. Product Features
The APC BK500 UPS offers the following key features:
- Battery-Protected and Surge-Only Outlets: Provides backup power and surge protection for critical devices, and surge protection only for less critical devices.
- Dataline Surge Protection: Protects connected equipment from surges traveling over data lines (e.g., phone/fax lines).
- Power Conditioning: Guards against surges, spikes, lightning, and other power disturbances.
- Audible Alarms: Notifies you of changing utility power and UPS conditions.
- Automatic Restart of Loads: Automatically restarts connected equipment after UPS shutdown due to power depletion, once utility power returns.

This image displays the front panel of the APC BK500 UPS. Visible are the 'On Line', 'On Battery', 'Overload', and 'Replace Battery' indicator lights, along with the main power button. The 'Back-UPS CS 500' model name and APC logo are also present.

This image shows the rear panel of the APC BK500 UPS. It features multiple power outlets, clearly labeled for 'Battery Backup Plus Surge Protection' and 'Surge Protection Only'. Also visible are modem/phone/fax ports, a data port, and a push-to-reset circuit breaker button.
5. Setup Instructions
- Unpack the UPS: Carefully remove the UPS from its packaging. Inspect for any shipping damage.
- Connect to Power: Plug the UPS power cord directly into a grounded 3-prong wall outlet. Do not use extension cords or surge protectors.
- Initial Charge: Allow the UPS to charge for at least 10 hours before connecting any equipment. This ensures optimal battery runtime.
- Connect Equipment:
- For critical devices requiring battery backup and surge protection (e.g., computer, monitor), plug them into the outlets labeled "Battery Backup Plus Surge Protection".
- For devices requiring only surge protection (e.g., printer, scanner), plug them into the outlets labeled "Surge Protection Only".
- Connect Data Lines (Optional): If desired, connect your phone/fax line or network cable through the dataline surge protection ports on the rear of the UPS.
- Install Software (Optional): Install the included power management software on your computer using the provided CD. This software allows for advanced monitoring and graceful shutdown of your computer during extended power outages.
6. Operating the UPS
- Power On/Off: Press the power button on the front panel to turn the UPS on or off.
- Indicator Lights:
- On Line (Green): The UPS is supplying utility power to connected equipment.
- On Battery (Yellow): The UPS is supplying battery power to connected equipment.
- Overload (Red): Connected equipment exceeds the UPS's capacity. Disconnect non-essential equipment.
- Replace Battery (Red): The UPS battery needs replacement.
- Audible Alarms:
- Four beeps every 30 seconds: UPS is running on battery power.
- Continuous tone: Low battery condition or UPS overload.
- Self-Test: To perform a self-test, ensure the UPS is connected to utility power and press and hold the power button for a few seconds until the UPS beeps and the 'On Battery' light flashes. The UPS will return to 'On Line' mode after the test.
7. Maintenance
- Battery Replacement: The battery in the APC BK500 is not user-serviceable. When the 'Replace Battery' indicator illuminates, contact APC customer support or a certified service provider for battery replacement. Using non-APC approved batteries may void your warranty and pose a safety risk.
- Cleaning: Disconnect the UPS from the power outlet before cleaning. Use a soft, dry cloth to wipe the exterior. Do not use liquid or aerosol cleaners.
- Storage: If storing the UPS for an extended period, charge it every three months to prevent battery degradation.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| UPS will not turn on | UPS not connected to utility power; Battery not charged; UPS fault. | Ensure power cord is securely plugged in. Allow 10 hours for initial charge. If problem persists, contact support. |
| UPS beeps continuously | UPS is overloaded; Low battery. | Disconnect non-essential equipment from battery backup outlets. Allow battery to charge. |
| 'Replace Battery' light is on | Battery has reached end of life. | Contact APC support for battery replacement. |
| No power to connected equipment | Circuit breaker tripped; UPS is off; Battery depleted. | Press the circuit breaker reset button on the rear panel. Turn on the UPS. Allow battery to charge. |
| Dataline protection not working | Incorrect connection. | Ensure input and output lines are correctly connected to the respective ports on the UPS. |
| UPS not providing expected runtime | Battery not fully charged; Battery nearing end of life; Overload. | Allow battery to fully charge. Consider battery replacement if old. Reduce connected load. |
9. Specifications
- Model: BK500
- Output Power Capacity: 500VA / 300W
- Input Voltage: 120 Volts AC
- Output Voltage: 120 Volts
- Form Factor: Rack
- Color: WHITE
- Item Weight: 13.2 pounds
- Manufacturer: APC Products
10. Warranty and Support
For warranty information, technical support, or service inquiries, please visit the official APC website or contact APC customer service. Keep your purchase receipt as proof of purchase.
Online Resources: www.apc.com





