Nokia IP1200 Series Installation Manual page 142

8
Installing and Replacing Other Components
The power supplies are autosensing and can accept input voltages between
85 VAC and 264 VAC. The power supply output is regulated to a tolerance of
± 5 percent of the specified output voltage.
Under certain circumstances, the power supplies feel hot to the touch. This
happens when the power supply is connected to AC power, but is not turned
on. In this state the 3.3 V standby circuitry is powered on, causing the power
supply to heat up. Because the power supply is not turned on, the integrated
cooling fan is not operating.
In this situation, the power supply still meets all safety standards.This
condition is normal and does not affect the performance of the Nokia IP1200
Series. To cool the power supply down, use the power supply switch to turn
on power and activate the integrated cooling fan.
Caution
The Nokia IP1200 Series power supply might be hot to the touch
when the power supply unit is plugged in to an AC power source and
the power supply is not turned on
AC power receptacle
Power supply A
Power supply B
142
Integrated power supply
cooling fans
Nokia IP1200 Series Security Platform Installation Guide
Power supply switches
00308a