XR150/XR550 Series Installation Guide Digital Monitoring Products
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INSTALLATION
6.5 Discharge/Recharge
The XR150/XR550 Series battery charging circuit oat charges at 13.8 Vdc at a maximum current of 1.0 Amps using a
50 VA or 56 VA transformer. Listed below are the various battery voltage level conditions:
Battery Trouble: Below 11.9 Vdc
Battery Cutoff: Below 10.2 Vdc
Battery Restored: Above 12.6 Vdc
6.6 Battery Supervision
The XR150/XR550 Series tests the battery when AC power is present. The test is done every three minutes and lasts
for ve seconds. During the test, the panel places a load on the battery; if the battery voltage falls below 11.9 Vdc
a low battery is detected. If AC power is not present, a low battery is detected any time the battery voltage falls
below 11.9 Vdc.
If a low battery is detected with AC power present, the test repeats every two minutes until the battery charges
above 12.6 Vdc indicating the battery has restored voltage. If a weak battery is replaced with a fully charged
battery, the restored battery will not be detected until the next two minute test is completed.
6.7 Battery Cutoff
The panel disconnects the battery any time the battery voltage drops below 10.2 Vdc. This prevents battery deep
discharge damage.
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