NOTE: You can connect the power cable to the 24V AC/DC, 19 VDC, and
a battery simultaneously.
NOTE: The power adapter and sealed lead-acid battery are sold separately.
NOTE: Installing the battery is optional. It is recommended to connect a
sealed 12V lead-acid battery to the power module.
NOTE: The 12V lead-acid battery is not sold by Dell.
Power module — Connecting a battery
For uninterrupted operation of the system, an additional redundancy option is to
connect an external battery. If the power supply through the power adapter (19.5
VDC) or power port (24 VAC or 24 VDC) fails, the power module will seamlessly
switch to the battery.
Power Module Overview 47
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