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
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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.
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Ensure that the chassis is grounded. For grounding instructions, see Grounding the Chassis.
Procedure
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.
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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. |
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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. |
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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).
Procedure
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. |
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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. |
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Step 3 |
Grasp the power supply handle while pressing the release latch towards the power supply handle. |
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Step 4 |
Place your other hand under the power supply to support it while you slide it out of the chassis.
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What to do next
You are ready to install an HVAC/HVDC power supply in the open slot.
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).
Procedure
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:
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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
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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).
Note
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.
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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+n power redundancy, there must be a separate power source for each power supply installed in the chassis. Otherwise, only one power source is required.
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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.
Procedure
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 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.
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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. |
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Step 3 |
Attach the power cable to the electrical outlet on the front of the power supply. |
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Step 4 |
Make sure that the other end of the power cable is attached to the appropriate power source for the power supply.
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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.
Note |
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
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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.
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If you are using n+n power 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.
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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.
Procedure
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 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.
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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. |
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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. |
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Step 4 |
Make sure that the other end of the power cable is connected to the appropriate power source for the power supply. |
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Step 5 |
If using a DC power source, turn on the circuit breaker for the DC power source connected to the power supply. |
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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
You can replace one power supply while the other one provides power to the switch.
Before you begin
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The circuit breaker for the DC power source for the power supply must be turned off.
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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
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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+n power 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.
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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.
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We recommend 8-AWG wire for DC installation in the U.S.
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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.
Procedure
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 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.
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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. |
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Step 3 |
Turn on the circuit breaker for the DC power source connected to the power supply. |
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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.
Note |
The recommended wire gauge is 8 AWG. The minimum wire gauge is 10 AWG. |
Warning |
<!--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. |
Before you begin
You must turn off the circuit breaker for the DC power cables that you are connecting to prevent electrocution.
Procedure
Step 1 |
Verify that the circuit breaker for the power feed to the replacement power supply is turned off. |
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Step 2 |
Remove the DC power connector block from the power supply by doing the following:
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Step 3 |
Strip 0.6 inches (15 mm) of insulation off the DC wires that you are using. |
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Step 4 |
Orient the connector as shown in the following figure with the orange plastic button on top.
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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. |
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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. |
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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. |
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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". |
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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. |