Securitron AQU126B User Manual

Page 6

Page 6

P/N 500-30035

Rev. A, 04/13

C. Install Batteries
1. Understanding Battery Charging and Backup Power

The AQU126B is a backup battery charger with automatic fail over to battery power in case of primary AC
power failure when batteries are installed and connected to the power module. The use of battery backup is
optional - the unit will function without batteries installed, but no internal backup power will be available in
case of AC power failure.

Note: The battery circuit features automatic disconnect when the battery output falls to 9.8VDC to prevent
deep discharge and also protects the power module in case the battery is connection is reversed.

For battery backup in 12VDC operation, a single 12V battery may be used, or two (2) 12V batteries may be
used wired in parallel for longer run time.

Backup power run time depends on the continuous output needed to support the load and the ambient
temperature at the enclosure. Estimates are provided in the Estimated Standby Time table:
Estimated Standby Time (3 amp/5 minute reserve for alarm)

Standby

Amps

4Ah Battery

Standby

7Ah Battery

Standby

12Ah Battery

Standby

24Ah Battery

Standby

40Ah Battery

Standby

.6 Hrs

1.1 Hrs

2.4 Hrs

5.7 Hrs

9.5 Hrs

.4 Hrs

.79 Hrs

1.5 Hrs

3.6 Hrs

7.4 Hrs

.32 Hrs

.63 Hrs

1.2 Hrs

2.9 Hrs

5.9 Hrs

.27 Hrs

.49 Hrs

.96 Hrs

2.4 Hrs

4.75 Hrs

Larger batteries may be used external to the enclosure by running the battery cable through a dedicated
knockout separate from the AC input and DC output.

Charge current is not less than 500mA @12VDC at peak load.

2. Connecting the Battery

Plug battery cable assembly into battery backup plug -BAT+.

Install batteries. Mark batteries with “Installed” date and “Replace By” date according to manufacturer’s
battery life recommendations.

Connect leads to batteries.

For 12VDC operation:
Connect red battery lead to the Positive (+) battery terminal.
Connect black battery lead to the Negative (-) battery terminal.

Testing

Test Input and Outputs

AC Input: Enable AC power to input line. Confirm LED on front of enclosure is lit.

DC output: If connected to load or distribution board, DC output indicator on power module will be lit.

If not connected to load or distribution board, test output with Amp Meter to verify current.

AC Fail Notification: Disable AC power to input line. If AC fail notification is configured, the switch will
change state, triggering the notification output.

Low Battery Notification: Disable AC power to input and allow batteries to run down to Low Battery
Warning