APC AP7723 Automatic Transfer Switch User Manual

1. Introduction

The APC AP7723 Automatic Transfer Switch (ATS) is a rack-mountable device designed to provide redundant power to connected equipment. It automatically transfers power from a primary source to a secondary source when the primary source becomes unavailable, ensuring continuous operation of critical loads. This manual provides essential information for the safe and efficient installation, operation, and maintenance of your AP7723 ATS.

2. Safety Information

Please read and understand all safety instructions before installing or operating the AP7723 ATS. Failure to follow these instructions may result in electric shock, fire, or serious injury.

• Ensure the unit is properly grounded.
• Do not operate the unit in wet or excessively humid environments.
• Disconnect all power sources before performing any maintenance or installation procedures.
• Only qualified personnel should install and service this equipment.
• Verify that the input voltage and current ratings of the ATS match the power sources and connected equipment.

3. Setup and Installation

3.1 Package Contents

Verify that all components are present:

• APC AP7723 Automatic Transfer Switch unit
• Rack-mounting hardware
• Documentation (this manual)

3.2 Physical Installation (Rack-Mounting)

The AP7723 is designed for installation in a standard 19-inch equipment rack, occupying 1U of rack space.

1. Secure the rack-mounting brackets to the sides of the ATS unit using the provided screws.
2. Mount the ATS into the desired 1U space in your equipment rack using the appropriate rack screws. Ensure it is securely fastened.

3.3 Connecting Power Sources

The AP7723 features two independent AC power inputs (Source A and Source B) and multiple output connectors.

Figure 1: Rear panel of the AP7723 ATS, illustrating the dual power inputs (Source A and Source B) and the nine output connectors. This view helps in identifying where to connect primary and secondary power, as well as the devices to be powered.

1. Connect the primary power source cable to the "Source A" input on the rear panel of the ATS.
2. Connect the secondary power source cable to the "Source B" input on the rear panel of the ATS.
3. Ensure both power sources are active and stable.

3.4 Connecting Output Devices

The AP7723 provides 9 output connectors to power your equipment.

1. Connect your critical equipment power cords to the available output connectors on the rear panel of the ATS.
2. Ensure that the total load of the connected equipment does not exceed the maximum current rating of the ATS.

3.5 Network and Serial Connection

The AP7723 supports Ethernet 10/100 and RS-232 for remote management and monitoring.

• Ethernet: Connect a standard Ethernet cable from the ATS's Ethernet port to your network switch or router for network-based management.
• RS-232: Connect a serial cable from the ATS's RS-232 port to a computer or console server for local management.

4. Operation

4.1 Front Panel Overview

Figure 2: Front panel of the AP7723 ATS, displaying the Input A/B indicators, Output indicator, Preference A/B buttons, Amps display, and Status LEDs. This panel allows for monitoring power status and setting power source preference.

• Input A/B LEDs: Indicate which input source is active and available.
• Output LED: Indicates that power is being supplied to the connected equipment.
• Preference A/B Buttons: Allow manual selection of the preferred input source.
• Amps Display: Shows the total current draw of the connected equipment.
• Status LEDs: Provide information on the unit's operational status and any potential issues.

4.2 Automatic Transfer Logic

The AP7723 continuously monitors both input power sources. Under normal conditions, it will draw power from the preferred source (default or user-selected). If the preferred source fails or deviates from acceptable voltage/frequency parameters, the ATS will automatically transfer the load to the alternate source within milliseconds, ensuring uninterrupted power to connected devices.

4.3 Setting Power Source Preference

You can set a preferred input source using the front panel buttons or through the network management interface.

• Press the "Preference A" button to set Source A as the preferred input.
• Press the "Preference B" button to set Source B as the preferred input.
• The ATS will attempt to draw power from the preferred source whenever both sources are available and within acceptable limits.

5. Maintenance

The APC AP7723 ATS is designed for reliable operation with minimal maintenance. However, periodic checks are recommended.

• Cleaning: Keep the unit free from dust and debris. Use a dry cloth to wipe the exterior. Do not use liquid cleaners.
• Cable Inspection: Periodically inspect all power and network cables for signs of wear or damage. Replace any damaged cables immediately.
• Firmware Updates: Check the APC website for available firmware updates to ensure optimal performance and access to new features. Follow the provided instructions for updating firmware.

6. Troubleshooting

This section provides solutions to common issues you might encounter with your AP7723 ATS.

If the problem persists after attempting these solutions, contact APC technical support.

7. Specifications

8. Warranty and Support

For information regarding product warranty, technical support, or service, please refer to the official APC website or contact your local APC representative. Keep your purchase receipt for warranty claims.

Online Resources: www.apc.com/support