XTL Installation Guide
Digital Monitoring Products
5
InstallatIon
Secondary Power Supply
6.1 Standby Battery
The XTL rechargeable battery is used to provide 24 hours of backup battery power when DC power is not
available. The battery is intended for backup power only and not to operate the XTL panel on a daily basis.
If the battery is low, or not plugged into the J1 battery connector, a low battery condition is indicated by the
XTL panel.
Note: If removing the XTL panel from service, disconnect the backup battery from the XTL connector.
6.2 Replacement
Use the following steps to replace the XTL standby battery. DMP recommends replacing the battery every 3
years under normal use.
Top PCB Snaps
Bottom PCB Snaps
Battery
connector
3.7V
Rechargeable
Battery
Figure 4: Standby Battery Replacement
1. Unplug the battery connector (J1) from the XTL panel.
2. Loosen the top PCB snaps.
3. Lean the panel PCB forward and lift out from the bottom PCB snaps.
4. Remove and properly dispose of the used battery.
Caution: Risk of fire, explosion, and burns. Do not disassemble, heat above 212°F (100°C),
or incinerate. Properly dispose of used batteries.
5. Place the new battery into the XTL housing base with the battery wires directed toward the
bottom right corner. See Figure 4.
6. Set the XTL PCB into the bottom snaps and press into the top snaps to secure in place.
7. Plug the battery into the panel connector (J1).
6.3 Battery Supervision
The panel tests the battery once every hour when DC power is present. This test occurs 15 minutes past
each hour and lasts for five seconds. A load is placed on the battery and if the battery voltage is low, a low
battery is detected. If DC power has failed, a low battery is detected any time the battery voltage falls
below 3.7V.
