Installing A Dc Power Supply - Cisco Nexus 9236C Hardware Installation Manual

Installing a DC Power Supply

Note DC power supplies with green coloring have the same port-side intake airflow direction as the power supplies
with red coloring, and DC power supplies with gray coloring have the same port-side exhaust airflow direction
as the power supplies with blue coloring. HVAC/HVDC power supplies automatically use the same airflow
direction as the installed fan modules. If the power supply that you are replacing has a different color handle
than the replacement power supply, verify that it has or will have the same airflow direction as the other
modules in the switch.
Before you begin
• If you are using DC power for the replacement power supply, the circuit breaker for the power feed to
• If you are using n+n power redundancy, there must be a separate power source for each power supply
• There must be an earth ground connection to the chassis that you are installing the replacement module.
Step 1 Holding the replacement power supply with one hand underneath the module and the other hand holding the handle, turn
the power supply so that its release latch is on the right side and align the back end of the power supply (the end with the
electrical connections) to the open power supply slot before carefully sliding the power supply all the way into the slot
until it clicks into place.
If the power supply does not fit into the open slot, turn the module over before sliding it into the open slot.
Note
Step 2 Test the installation by trying to pull the power supply out of the slot without using the release latch.
If the power supply does not move out of place, it is secured in the slot. If the power supply moves, carefully press it all
the way into the slot until it clicks in place.
Step 3
If the DC power cables and a grounding cable are already connected to an electrical connector block, insert the block
into the power receptacle on the power supply.
If the electrical cables have not been connected to the electrical connector block, wire them as described in
V DC Electrical Connector Block, on page
Step 4 Make sure that the other end of the power cable is connected to the appropriate power source for the power supply.
Step 5 If using a DC power source, turn on the circuit breaker for the DC power source connected to the power supply.
Step 6
Verify that the power supply is operational by making sure that the power supply
what the power supply LEDs indicate, see
Installing a DC Power Supply
This topic is for installing the 48-V DC power supply into switch chassis. If you need to install a high voltage
(HVAC/HVDC) power supply, see
Cisco Nexus 9236C NX-OS Mode Switch Hardware Installation Guide
38
the power supply that you are replacing must be turned off.
installed in the chassis (power sources must be of the same type—do not mix AC and DC power sources
for the same switch). Otherwise, only one power source is required.
Typically, the chassis is grounded by its metal-to-metal connection to a grounded rack. If you need to
ground this chassis by another means, see
39.
Power Supply LEDs, on page
Grounding the Chassis, on page
54.
Installing an HVAC/HVDC Power Supply, on page
Replacing Modules
24.
Wiring a 48
LED is green. For information on
37.