Watchguard XTM 1520 Hardware Manual page 9

Rear View - XTM 1520-RP, 1525-RP
The fans, replaceable and redundant power supplies, AC receptacles, power switch, and alarm override switch
are located on the rear of the device..
Fans
The fans decrease the internal temperature of the device. The fans start at maximum RPM when the
device is powered on. The device continually adjusts the fan speed based on the external
temperature and device CPU load.
AC receptacles on each power supply
Each AC receptacle accepts a detachable AC power cord supplied with the XTM device. Each power
supply for the device is a WatchGuard standard auto-sensing AC power supply.
Replaceable power supplies and power switch
There are two power supplies on the XTM 1520-RP and 1525-RP devices, each with a power indicator
light at the top. The power switch activates both power supplies.
It is not necessary to turn off the XTM device to replace a failed power supply.
If one of the power supplies fails, the green power indicator light for that power supply goes out and
an audible alarm sounds.
Caution
Alarm reset button
If either of the two power supplies fails for any reason, an audible alarm sounds. To silence the audible
alarm, press the reset button located to the left of the power supplies.
Alarm reset
Hardware Guide
You must disconnect power the AC power cord from both power supplies before you remove
the cover of the XTM 1520-RP or 1525-RP device for any reason.
Power Indicators
Hardware Specifications
7