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title: "Changing AC Power Supplies"
canonical: "https://docs.infoblox.com/space/IIGFIAIA/14385248/Changing%20AC%20Power%20Supplies"
format: markdown
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**Note**: Before changing power supplies, make sure that they are securely cabled. An apparently failed power supply may simply be improperly connected to its power source.

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The Infoblox-4030 and Infoblox-4030-10GE appliances ship with two redundant, auto-switching AC power supplies or optional DC power supplies, in a 1+1 configuration. The power supplies are "hot-swappable", so you can remove or replace one power supply without interrupting appliance operation and network services.  
 When a power supply fails for any reason, NIOS displays a power supply alarm. The Infoblox NIOS Dashboard will also display an Error under Grid Status. An email notification will be sent and an SNMP Trap will be reported.  
 When the appliance contains two functioning power supplies, they share the power load. If one power supply fails, the other assumes the full load automatically and the appliance sends the system alarm to NIOS. Although the appliance can run with only one power supply, Infoblox recommends installing both power supplies that are shipped with the appliance. This configuration minimizes the chance of system failure due to failure of an individual power supply.   
 Each power supply weighs about three pounds (1.36 kg). The faceplate of the power supply contains a power LED and a power switch. Each AC power supply provides a dedicated male power outlet. *<span style="color: #0000ff">[Figure 14](#ChangingACPowerSupplies-bookmark62)</span>* illustrates the process of replacing an AC power supply.

  
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*Figure 14* *Removing an Infoblox-4030/Infoblox-4030-10GE* *AC* *Power Supply*

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 To replace an Infoblox-4030/Infoblox-4030-10GE AC power supply, do the following:

1. Turn off the power supply.
2. Disconnect the AC power cable from the power outlet.
3. Gently push back the red catch-release lever, grip the power supply handle, and pull the power supply unit out of the chassis as illustrated in *<span style="color: #0000ff">[Figure 14](#ChangingACPowerSupplies-bookmark62)</span>*.
4. Place the replacement power supply into the bay and push it forward until it is fully seated in the chassis. The catch-release lever will gently click into place.
5. Reconnect the power cable.
6. Turn on the power supply. If it is fully seated, powered on, and operating properly, the LED glows steady green.

# Changing DC Power Supplies

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***<span style="color: #ff0000">WARNING</span>****<span style="color: #ff0000">:</span>* *<span style="color: #ff0000">When</span>* *<span style="color: #ff0000">installing</span>* *<span style="color: #ff0000">a DC</span>* *<span style="color: #ff0000">power</span>* *<span style="color: #ff0000">supply,</span>* *<span style="color: #ff0000">connect the ground wire to the</span>* *<span style="color: #ff0000">PSU</span>* *<span style="color: #ff0000">before</span>* *<span style="color: #ff0000">connecting the</span>* *<span style="color: #ff0000">positive or negative</span>* *<span style="color: #ff0000">leads.</span>* *<span style="color: #ff0000">Ensure</span>* *<span style="color: #ff0000">that</span>* *<span style="color: #ff0000">you</span>* *<span style="color: #ff0000">use the</span>* *<span style="color: #ff0000">correct</span>* *<span style="color: #ff0000">polarity when</span>* *<span style="color: #ff0000">connecting</span>* *<span style="color: #ff0000">power</span>* *<span style="color: #ff0000">leads</span>* *<span style="color: #ff0000">to</span>* *<span style="color: #ff0000">the</span>* *<span style="color: #ff0000">PSU. Always remove</span>* *<span style="color: #ff0000">power</span>* *<span style="color: #ff0000">from</span>* *<span style="color: #ff0000">the</span>* *<span style="color: #ff0000">power supply before</span>* *<span style="color: #ff0000">performing</span>* *<span style="color: #ff0000">any</span>* *<span style="color: #ff0000">installation</span>* *<span style="color: #ff0000">or</span>* *<span style="color: #ff0000">replacement</span>* *<span style="color: #ff0000">steps</span>* *<span style="color: #ff0000">or</span>* *<span style="color: #ff0000">maintenance of</span>* *<span style="color: #ff0000">the power</span>* *<span style="color: #ff0000">supply.</span>*

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In DC power configuration, the Infoblox-4030 and Infoblox-4030-10GE appliances ship with two redundant, auto-switching DC power supplies. The power supplies are "hot-swappable", so you can remove or replace one power supply without interrupting appliance operation and network services.  
 To replace an Infoblox-4030/Infoblox-4030-10GE DC power supply, do the following:

1. Disconnect the DC power cable from the power outlet on the external transformer.
2. Disconnect the power cable from the power supply.
3. Disconnect the ground cable from the power supply.
4. Gently push back the red quick-release lever, grip the power supply handle, and pull the power supply unit out of the chassis, as shown in *<span style="color: #0000ff">[Figure 15](#ChangingACPowerSupplies-bookmark64)</span>*.
5. Place the replacement power supply into the bay and push it forward until it is fully seated in the chassis. The red catch-release lever will gently click into place.
6. Connect the ground cable to the new power supply.
7. Connect the power cable, ensuring that you use the correct polarity. If the power supply is fully seated and operating, the LED glows steady green.

  
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*Figure 15*> Macro (anchor)

 *Removing an* *Infoblox-4030/Infoblox-4030-10GE* *DC Power Supply*   
   
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Notes on Changing AC Power to DC Power

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**Note**: For additional DC power guidelines, see *<span style="color: #0000ff">[DC Power](https://infoblox-docs.atlassian.net/wiki/spaces/IIGFIAIA/pages/14385164/Powering+On+the+Appliance#PoweringOntheAppliance-bookmark38)</span>*[ ](https://infoblox-docs.atlassian.net/wiki/spaces/IIGFIAIA/pages/14385164/Powering+On+the+Appliance#PoweringOntheAppliance-bookmark38)*<span style="color: #0000ff">[Supply Guidelines](https://infoblox-docs.atlassian.net/wiki/spaces/IIGFIAIA/pages/14385164/Powering+On+the+Appliance#PoweringOntheAppliance-bookmark38)</span>*[.](https://infoblox-docs.atlassian.net/wiki/spaces/IIGFIAIA/pages/14385164/Powering+On+the+Appliance#PoweringOntheAppliance-bookmark38)

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Infoblox offers the ability to change an AC-equipped Infoblox appliance to use DC power supply units by ordering field-replaceable unit DC PSUs (listed in *<span style="color: #0000ff">[Table 9](https://infoblox-docs.atlassian.net/wiki/spaces/IIGFIAIA/pages/14385244/Infoblox-4030+Infoblox-4030-10GE+Field+Replaceable+Unit+Part+Numbers#Infoblox-4030/Infoblox-4030-10GEFieldReplaceableUnitPartNumbers-bookmark71)</span>*). Should you choose to swap out an appliance's AC PSUs to use DC PSUs, follow these key points:

- You cannot convert an AC-equipped Infoblox-4030 or Infoblox-4030-10GE appliance to NEBS compliance by swapping out AC PSUs for DC PSUs. You are simply changing the power factor of the appliance.
- Ensure that you have proper ground connections that connect to the ground lug screws on each DC PSU. These lug screws will be marked with a standard electrical ground symbol on each DC PSU, as labeled in *<span style="color: #0000ff">[Figure 15](#ChangingACPowerSupplies-bookmark64)</span>*.
- Your Infoblox appliance provides a ground lug, with two star washers and a ground lug screw, in the accessory kit bundled with your appliance. (This accessory is not used for AC power.) Ensure that this ground lug is properly installed with a grounding cable to chassis ground. For information, see *<span style="color: #0000ff">Ground</span>* *<span style="color: #0000ff">Lug</span>* *<span style="color: #0000ff">Installation (DC</span>* *<span style="color: #0000ff">Systems Only)</span>*.

*Important–Retain your original** AC** power** supplies **for** possible** future** RMAs*

- When you remove the AC power supplies for new DC power supplies, *ensure** that** you **keep** the** original** AC** power** supplies **in **a safe** place **for **use** in** RMA** situations.*
- For appliance RMAs, you must replace the DC power supplies in the appliance with its original AC power supplies *before* RMA shipment back to Infoblox.
- Keep your DC power supplies in your facility until you receive your replacement appliance.