Cisco Nexus 93108TC-EX User manual

Replacing Modules
•Replacing a Fan Module, on page 1
•Replacing a Power Supply Module, on page 2
Replacing a Fan Module
You can replace a fan module while the switch is operating so long as you perform the replacement within
one minute. If you cannot perform the replacement within one minute, leave the original fan module in the
chassis to maintain the designed airflow until you have the replacement fan module on hand and can perform
the replacement.
If you are replacing a module during operations, be sure that the replacement fan module has the correct
direction of airflow, which means that it has the same airflow direction as the other modules in the chassis.
Also, be sure that the airflow direction takes in air from a cold aisle and exhausts to a hot aisle. Otherwise,
the switch can overheat and shutdown.
If you are changing the airflow direction of all the modules in the chassis, you must shutdown the switch
before replacing all the fan and power supply modules with modules using the other airflow direction. During
operations, all of the modules must have the same direction of airflow.
Caution
Removing a Fan Module
Statement 263—Fan Warning
The fans might still be turning when you remove the fan assembly from the chassis. Keep fingers, screwdrivers,
and other objects away from the openings in the fan assembly's housing.
Warning
Step 1 On the fan module that you are removing, press the two sides of the fan module handle next to where it connects to the
fan module and pull on the handles enough to unseat it from its connectors.
Step 2 Holding the handle, pull the module out of the chassis.
Replacing Modules
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Do not touch the electrical connectors on the back side of the module and prevent anything else from coming
into contact with and damaging the connectors.
Caution
Installing a Fan Module
Before you begin
• A fan slot must be open and ready for the new fan module to be installed.
• You must have a new fan module on hand and ready to install within one minute of removing the original
fan module if the switch is operating.
• The new fan module must have the same airflow direction as the other fan and power supply modules
installed in the switch. All of these modules must have either burgundy coloring (port-side intake airflow)
or they must all have blue coloring (port-side exhaust airflow).
Step 1 Holding the fan module by its handle, align the back of the fan module (the side with the electrical connectors) to the
open fan slot in the chassis.
Step 2 Slide the fan module into the slot until it clicks in place.
Step 3 Verify that the Status (STS) LED turns on and becomes green.
Replacing a Power Supply Module
The switch requires two power supplies for redundancy. With one power supply providing the necessary
power for operations, you can replace the other power supply during operations so long as the new power
supply has the same airflow direction as the other modules in the chassis.
You can replace a power supply with another supported power supply that has the same power source type
and the same wattage rating as the other installed power supply. Additionally, the airflow direction of the
power supply must match or conform to the airflow direction of the installed fan modules. For the airflow
direction used by the switch, see the coloring of the fan modules.
Removing an AC Power Supply
To remove an AC power supply, you must first disconnect the power cable and then remove the module from
the chassis.
Before you begin
• To replace a power supply during operations, you must have a functioning power supply providing power
to the switch while you replace the other power supply. If there is only one power supply installed in the
switch and you need to replace it, install the new power supply in the open slot and power it up before
removing the original power supply.
Replacing Modules
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Replacing Modules
Installing a Fan Module

• Ensure that the chassis is grounded. For grounding instructions, see Grounding the Chassis.
Step 1 Pull the power cord out from the power receptacle on the power supply to be removed and verify that the LED turns
off.
The LED might be on and amber colored to indicate that the input power has been disconnected.
Note
If you need to remove an Anderson's Saf-D-Grid power cable connector from a high-voltage power supply,
press the tab at the top of the connector and pull the connector out of the power supply.
Note
Step 2 Remove the power supply from the chassis by pushing and holding its thumb latch to the left and pulling the power supply
part way out of the chassis.
Step 3 Place your other hand under the power supply to support it while you slide it out of the chassis.
Either place the power supply on an antistatic surface or pack it in its packing materials.
Step 4 If the power supply slot is to remain empty, install a blank power supply filler panel (part number N2200-P-BLNK).
What to do next
You are ready to install the replacement power supply.
Removing an HVAC/HVDC Power Supply
You can remove one power supply while the other one provides power to the switch.
To disconnect the power supply from its power cables, you must shut off the power from the power source
and then either disconnect a connector for the power cables or release each of three cables from the power
supply (requires a standard screw driver).
Step 1 Turn off the circuit breaker for the power feed to the power supply that you are replacing.
Be sure that the LEDs turn off on the power supply that you are removing.
Step 2 Remove the power cable from the power supply by pressing the tab on the top of the Anderson Power SAF-D-Grid
connector and pull the cable and connector out of the power supply.
Step 3 Grasp the power supply handle while pressing the release latch towards the power supply handle.
Step 4 Place your other hand under the power supply to support it while you slide it out of the chassis.
Do not touch the electrical connectors on the back side of the module and prevent anything else from coming
into contact with and damaging the connectors.
Caution
What to do next
You are ready to install an HVAC/HVDC power supply in the open slot.
Replacing Modules
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Replacing Modules
Removing an HVAC/HVDC Power Supply

Removing a DC Power Supply
You can remove one power supply while the other one provides power to the switch.
To disconnect the power supply from its power cables, you must shut off the power from the power source
and then either disconnect a connector for the power cables or release each of three cables from the power
supply (requires a standard screw driver).
Step 1 Turn off the circuit breaker for the power feed to the power supply that you are replacing.
Be sure that the LEDs turn off on the power supply that you are removing.
Step 2 Remove the power cable from the power supply by doing the following:
• To remove an orange power cable connector from a 48-V DC power supply, do the following:
a. Push the orange plastic button on the top of the connector block inward toward the power supply.
b. Pull the connector block out of the power supply.
• To remove an Anderson Power Products Saf-D-Grid power cable connector from a high-voltage power supply, press
on the tab at the top of the Saf-D-Grid connector and pull the connector out of the power supply.
Step 3 Grasp the power supply handle while pressing the release latch towards the power supply handle.
Step 4 Pull the power supply out of the bay.
What to do next
You are ready to install a DC power supply in the open slot.
Installing an AC Power Supply
You can replace one power supply while the other one provides power to the switch.
Before you begin
• The power supply that you are installing must be capable of using the same airflow direction as the fan
trays installed in the same switch and it must use the same type of power source as the other power supply
installed in the same switch (do not mix AC and DC power supplies in the same switch).
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.
Note
Replacing Modules
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Replacing Modules
Removing a DC Power Supply

• An AC power source must be within reach of the power cable that will be used with the replacement
power supply. If you are using n+npower redundancy, there must be a separate power source for each
power supply installed in the chassis. Otherwise, only one power source is required.
• There must be an earth ground connection to the chassis that you are installing the replacement module.
Typically, the chassis is grounded by its metal-to-metal connection with a grounded rack. If you need to
ground the chassis, see Grounding the Chassis.
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 carefully 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 Attach the power cable to the electrical outlet on the front of the power supply.
Step 4 Make sure that the other end of the power cable is attached to the appropriate power source for the power supply.
Depending on the outlet receptacle on your power distribution unit, you might need the optional jumper cable
to connect the switch to your outlet receptacle.
Note
Step 5 Verify that the power supply is operational by making sure that the power supply LED is green. For information on
what the power supply LEDs indicate, see Power Supply LEDs.
Installing an HVAC/HVDC Power Supply
You can replace one power supply while the other one provides power to the switch.
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.
Note
Before you begin
• If you are using DC power for the replacement power supply, the circuit breaker for the power feed to
the power supply that you are replacing must be turned off.
Replacing Modules
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Replacing Modules
Installing an HVAC/HVDC Power Supply

• If you are using n+npower redundancy, there must be a separate power source for each power supply
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.
• There must be an earth ground connection to the chassis that you are installing the replacement module.
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 Grounding the Chassis.
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 Wiring a 48
V DC Electrical Connector Block, on page 7.
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 LED is green. For information on
what the power supply LEDs indicate, see Power Supply LEDs.
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 Installing an HVAC/HVDC Power Supply, on page 5.
You can replace one power supply while the other one provides power to the switch.
Before you begin
• The circuit breaker for the DC power source for the power supply must be turned off.
• The power supply that you are installing must be capable of using the same airflow direction as the fan
trays installed in the same switch
• A DC power source must be within reach of the power cable that will be used with the replacement power
supply. If you are using n+npower redundancy, there must be a separate power source for each power
supply installed in the chassis (do not mix AC and DC power sources for the same switch). Otherwise,
only one power source is required.
Replacing Modules
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Replacing Modules
Installing a DC Power Supply

• There must be an earth ground connection to the chassis that you are installing the replacement module.
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 Grounding the Chassis.
• We recommend 8-AWG wire for DC installation in the U.S.
• All DC power supplies have reverse polarity protection. When you inadvertently connect the input power
(+) to the DC PSU’s – terminal and the input power – to the DC PSU’s (+) terminal, the PSU will not
be damaged and will operate fine after the input power feeds are correctly wired.
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 carefully sliding it into the open
slot.
Note
Step 2 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 Wiring a 48
V DC Electrical Connector Block, on page 7.
Step 3 Turn on the circuit breaker for the DC power source connected to the power supply.
Step 4 Verify that the power supply is operational by making sure that the power supply LED is green. For information on
what the power supply LEDs indicate, see Power Supply LEDs.
Wiring a 48 V DC Electrical Connector Block
You must connect the ground, negative, and positive DC power cables to a connector block in order to connect
the power cables to a 48 V DC power supply.
The recommended wire gauge is 8 AWG. The minimum wire gauge is 10 AWG.
Note
<!--rcsi-show-stmt-number-->Statement 342—Before Connecting to System Power Supply
High touch/leakage current – Permanently connected protective earth ground is essential before connecting
to system power supply.
Warning
Statement 1024—Ground Conductor
This equipment must be grounded. To reduce the risk of electric shock, never defeat the ground conductor or
operate the equipment in the absence of a suitably installed ground conductor. Contact the appropriate electrical
inspection authority or an electrician if you are uncertain that suitable grounding is available.
Warning
Replacing Modules
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Replacing Modules
Wiring a 48 V DC Electrical Connector Block

Before you begin
You must turn off the circuit breaker for the DC power cables that you are connecting to prevent electrocution.
Step 1 Verify that the circuit breaker for the power feed to the replacement power supply is turned off.
Step 2 Remove the DC power connector block from the power supply by doing the following:
a) Push the orange plastic button on the top of the connector block inward toward the power supply.
b) Pull the connector block out of the power supply.
Step 3 Strip 0.6 inches (15 mm) of insulation off the DC wires that you are using.
Step 4 Orient the connector as shown in the following figure with the orange plastic button on top.
-48V (-DC) cable4Wire retainer lever1
Grounding cable (8 AWG recommended)5Orange plastic button on top of the connector2
-48V Return (+DC) cable3
Step 5 Use a small screwdriver to depress the spring-loaded wire retainer lever on the lower spring-cage wire connector. Insert
your green (ground) wire into the aperture and then release the lever.
Step 6 Use a small screwdriver to depress the spring-loaded wire retainer lever on the middle spring-cage wire connector. Insert
your black (DC negative) wire into the aperture and then release the lever.
Step 7 Use a small screwdriver to depress the spring-loaded wire retainer lever on the upper spring-cage wire connector. Insert
your red (DC positive) wire into the aperture and then release the lever.
Step 8 Insert the connector block back into the power supply. Make sure that your red (DC positive) wire aligns with the power
supply label, "+ DC".
Step 9 Verify that the other ends of the cables are attached to the DC power source and ground. You are then ready to turn on
the DC power source.
Replacing Modules
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Replacing Modules
Wiring a 48 V DC Electrical Connector Block