Chapter 10: Replacing DC Power Supplies in Summit Family Switches
Summit Family Switches Hardware Installation Guide
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5 For a Summit X670 series switch, note the direction of ventilation airflow, and verify that the power
supply airflow direction is the same as that of the switch.
● In a switch with front-to-back airflow, the fan modules are labeled Air Out.
● In a switch with back-to-front, the fan modules are labeled Air In.
6 Push the latching tab toward the power supply handle and pull outward on the handle to disengage
the power supply internal connectors (see Figure 305).
Figure 305: Removing a Summit 450 W or 550 W DC Power Supply
7 Carefully slide the power supply the rest of the way out of the switch.
8 If a replacement power supply will not be installed, install a cover over the unoccupied power
supply bay.
NOTE
Unoccupied power supply bays must always be covered to maintain proper system ventilation
and EMI levels.
Installing the Replacement Power Supply
To install a replacement Summit 450 W or 550 W DC power supply:
1 Verify that the replacement power supply is oriented the same as the unit you removed (see
Figure 312).
For a Summit X670 series switch, verify that the airflow direction of the power supply matches the
airflow direction of the switch.
2 Carefully slide the power supply all the way into the power supply bay (see Figure 312). Push the
power supply in until the latch snaps into place.
CAUTION
Do not slam the power supply into the switch.
SH_163
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