Using the Battery Management System The Battery Management System (BMS) does the following: battery management system USER’S GUIDE Capabilities of the System • Monitors each battery in the system and optimizes the state of its charge. • Identifies failing or failed batteries so that you can replace them before they cause damage to other batteries in the same string. • Extends battery life and ensures that batteries are able to supply back-up power on demand.
Sensors • Each current probe measures the charge and discharge current of its battery string. The Battery Management System uses this measurement to assess the performance of individual batteries, and to determine when the batteries are discharging. APC Field Service personnel can use the information about the current of the battery string for diagnostic purposes.
Adding or Removing Components Disconnect power to the system battery management system USER’S GUIDE Adding or Removing a Battery String Warning When adding or removing a battery string, first disconnect power to the Battery Management System by unplugging the power input cable to avoid causing sparks that could cause a battery to explode. Connect the new battery string See also See the installation guide (990-1224B), which came with your system, for battery string connection instructions.
Set the DIP switches The DIP Switches must be set to one of the following valid configurations. If the DIP switches are set incorrectly, your Battery Management System may not operate properly. battery management system USER’S GUIDE After disconnecting the input power, reset the DIP switches to configure the change in your system.
battery management system USER’S GUIDE Condition Switch Number 8 7 6 5 80 Amp Hour Batteries On Off Off Off 90 Amp Hour Batteries On Off Off On 100 Amp Hour Batteries On Off On Off 115 Amp Hour Batteries On Off On On 125 Amp Hour Batteries On On Off Off 150 Amp Hour Batteries On On Off On 175 Amp Hour Batteries On On On Off 200 Amp Hour Batteries On On On On *Default Setting ® 5 4 3 2 1
Install a current sensor 1. Set the DIP switches on the new current sensor to identify its location correctly. battery management system USER’S GUIDE If you add a second battery string to a system that had only one string, you need to install a second current sensor. The system needs one sensor per string to measure the current throughout the string. 2. Plug the ambient temperature sensor into the unused port on the current sensor to be located at the warmest area of the enclosure.
Restart the Battery Management System battery management system USER’S GUIDE After adding or removing a battery string, restart the Battery Management System by reconnecting the power input cable that you disconnected. At start-up, the Battery Management System integrates any new battery string and resets each battery's “current acceptance” (response) benchmark. After the system restarts, check the Batteries LEDs.
Troubleshooting The twelve LEDs on the front panel of the Battery Management System indicate the status of the system. The Battery Management System does not require a computer. The system notifies you of battery conditions and any system alarms through a set of LEDs and alarm relays. See LED states, and Interpreting alarms. battery management system USER’S GUIDE LED Definitions As a test, all LEDs turn on for 3 seconds when the system starts up. Observe this test carefully at start-up.
Alarm indicators Refer to the following table to determine the status of your system and follow the link for each event for more information.
Interpreting alarms The Battery Management System can generate Major or Minor alarms. • A Minor alarm indicates a condition that is not likely to result in the batteries being unable to provide back-up power, but could develop into a major alarm, or could prevent the detection of a major alarm. battery management system USER’S GUIDE • A Major alarm requires immediate action to ensure that the batteries are able to provide back-up power.
battery management system USER’S GUIDE Loss of System Power. The Battery Management System is not powered. Possible Causes Corrective Action Power leads are swapped or backwards • Reverse the power leads. Power leads are not connected to a power source • Connect the Battery Management System to a power source. Blown power lead fuse • Check the Battery wire harness for pinched or frayed wires. • Replace the fuse.
battery management system USER’S GUIDE String Polarity Mismatch. The second battery string’s polarity is reversed from the polarity of the first battery string. The Battery Management System will not detect the second string if its polarity is reversed. Possible Causes Corrective Action Second battery string’s polarity does not match the first string’s polarity • Reverse the order of the battery leads connected to one of the battery strings. Battery String A Missing. Minor Alarm.
battery management system USER’S GUIDE Discharge or Charger Inactive. Minor Alarm. The BMS detects 5 amps of continuous discharge current on either battery string for more than 5 seconds. Possible Causes Corrective Action Loss of AC to power supply • Restore AC input before batteries are exhausted.
battery management system USER’S GUIDE Charger Voltage High. Major Alarm. After a discharge or application of power, the Charger Voltage High alarm condition is ignored for 60 minutes. After the 60-minute delay, the Charger Voltage High alarm occurs if the string voltage value (the sum of all battery voltages in the string) is above the string voltage limits.
battery management system USER’S GUIDE Major Battery Fault. Major battery alarms require immediate corrective action. They usually result in the loss of the critical load during emergency battery operation.
Product Information Electrical battery management system USER’S GUIDE Specifications Item Specification Operating voltage range 22 – 54 VDC Monitoring current 1.6 A Maximum (Boost) current 3.
Physical battery management system USER’S GUIDE Item Specification Dimensions (H × W × D) 1.75 × 10 × 4 in (4.45 × 25.4 × 10.16 cm) Net weight 2.2 lb (1.0 kg) Shipping dimensions (H × W × D) 5.3 × 11.5 × 8.3 in (13.46 × 29.21 × 21.08 cm) Shipping weight 6 lb (2.
Warranty and Service APC warrants the Battery Management System to be free from defects in materials and workmanship for a period of two years from the date of purchase. Its obligation under this warranty is limited to repairing or replacing, at its own sole option, any such defective products. This warranty does not apply to equipment that has been damaged by accident, negligence, or misapplication or has been altered or modified in any way. This warranty applies only to the original purchaser.
Obtaining service To obtain support for problems with your Battery Management System: 0 2. Contact Customer Support at a phone number at the end of this user’s guide. A technician will try to help you solve the problem by phone. battery management system USER’S GUIDE 1. Note the serial number and date of purchase. The serial number is on the bottom of the unit. 3. If you must return the product, the technician will give you a return material authorization (RMA) number.
Life-Support Policy General policy battery management system USER’S GUIDE American Power Conversion (APC) does not recommend the use of any of its products in the following situations: • In life-support applications where failure or malfunction of the APC product can be reasonably expected to cause failure of the life-support device or to affect significantly its safety or effectiveness. • In direct patient care.
Customer support for this or any other APC product is available at no charge in any of the following ways: • Visit the APC Web site to find answers to frequently asked questions (FAQs), to access documents in the APC Knowledge Base, and to submit customer support requests. – www.apc.com (Corporate Headquarters) battery management system USER’S GUIDE APC Worldwide Customer Support Connect to localized APC Web sites for specific countries, each of which provides customer support information. – www.apc.
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