Backup Battery Charger manages power for control panel alarms.

Press Release Summary:

Battery Operated and Alarm Charger (BOAC) charges backup battery found in control panels using 12 Vdc alarm strobe and horn. With power loss alarm mode switch in enable position, loss of 120 Vac power activates strobe light and horn after 5 sec delay. Alarm contact closure across pins 3 and 10 will also activate strobe light and horn. Battery charge controller IC, designed to manage charging of sealed lead-acid batteries, offers Cyclic Charging and Float Charging modes.

Original Press Release:

M.P. Electronics Announces a Product Redesign for Its Popular Battery Operated and Alarm Charger (BOAC)

The BOAC is a device that charges the backup battery found in control panels using a 12 V DC alarm strobe and horn. The BOAC has a built in Power Loss Alarm with an Enable/Disable Select Switch.  With the Power Loss Alarm Mode Switch in the Enable position, the loss of 120 VAC power will cause the strobe light and horn to be activated after a 5 second delay. During an alarm with a loss of 120 VAC, the alarm strobe light and horn are powered by the battery.  Battery power is conserved by operating the horn intermittently, on for 2 seconds, and then off for 2 seconds.  An alarm contact closure across pins 3 and 10 will also activate the strobe light and horn.  A push-to-test button is provided to verify system operation.

The newly re-designed BOAC utilizes a battery Charge Controller IC chip that was specifically designed to manage the charging of sealed lead-acid batteries.  This chip carefully controls the charging current and voltage during the charging process to maximize battery capacity and life.

The BOAC now has two charging modes, “Cyclic Charging” and “Float Charging”, thanks to the new Charge Controller chip.  If the BOAC unit were to be turned on often enough (or stay on long enough) to run the battery down below 12.1 V (50% charged), the Charge Controller will toggle into the Cyclic Charging Mode and recharge the battery to 14.6 V ± 1% @ 25°C. As long as the battery voltage stays above 12.1 V (50% charged), the Charge Controller will stay in the Float Charging Mode. Battery manufacturers typically recommend this dual voltage charging regiment to ensure the optimum capacity and life of their batteries.

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