Removing And Installing A Power Supply Blank - Cisco Catalyst 9400 Series Hardware Installation Manual

Removing and Replacing FRUs
Step 2
Check that the INPUT and OUTPUT LEDs on the power supply module are green.
Note
Step 3
Verify the polarity by measuring the voltage between the DC cable leads.
When measuring, check that the positive (+) lead and the negative (–) lead match the + and – labels on the
DC-input power supply module's terminal block.
If the DC inputs are powered from separate sources, also check that you have wired the cables straight across
to their respective A source and B source, and respective negative and positive terminals. Crossed positive or
negative cables constitute a severe safety hazard.
Step 4 Verify the module's operation by performing the steps described here:
Installation, on page

Removing and Installing a Power Supply Blank

If a power supply bay in a chassis is unused, you must cover it with a power supply blank cover to maintain
proper airflow through the chassis. (Part number C9400-PWR-BLANK=).
Figure 33: Front View of a Power Supply Blank Cover
1
DC-input power supply modules are shipped with the power button in the default auto-on mode,
which means that the module automatically starts on application of DC-input power. When you
install a new or replacement module straight out of the box, you do not have to press the power
button.
127.
Two finger holes with rings on the blank
cover.
To remove the blank cover, use the finger
holes to hold the blank cover and squeeze
both rings towards each other.
To install the blank cover, hold the blank
cover by the outside edges and push straight
into the bay; alternatively, use the finger
holes to hold the blank cover and push
straight into the bay, but do not squeeze the
rings.
Removing and Installing a Power Supply Blank
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Cisco Catalyst 9400 Series Switches Hardware Installation Guide
Verifying the Power Supply Module
125