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systems configured for AC power are equipped with either a single or dual redundant AC power supplies. These are Customer Replaceable Units (CRU). The figure AC Power Supply depicts a dual redundant configuration. The AC Power Supply product code is SBC-5400-PSUAC.

AC Power Supply

In a dual redundant power supply configuration, the power supplies are hot-swappable meaning that a power supply may be replaced without powering down the 

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platform (provided that the redundant power supply is operational).

 

Important
Before replacing a power supply in a redundant power supply configuration, verify the status of the redundant power supply. The “POK” LED status must be “solid green”. Removing the power supply when the redundant supply does not show a solid green status, may cause the system to power down. Contact Sonus Customer Support if required.

SBC 5400 AC power supply states

Power Supply ConditionLED Status (Green/Amber)
Standby ON, Main Output OFF, AC PresentBlinking Green
Standby ON, Main Output ONSolid Green
Main Output OCP, UVP, OVPBlinking Amber
FAN Fail, OTP, Standby OCP/UVPAmber

Parts and Tools Required

  • Electrostatic discharge (ESD) strap
  • Replacement AC power supply

 

The chassis is shipped with one power supply, unless a second power supply is added to the order.

 

 

To prevent damage from electrostatic discharge, an ESD strap is provided in the accessory kit. See Connecting ESD Wrist Strap to install it.

 

Replacing a Power Supply

Perform the following procedure to replace a power supply:

  1. Verify the POK green LED of the redundant power supply is lit.
  2. Attach an Electrostatic Discharge wrist strap to the ESD grounding point on the back panel of the chassis, and place the other end around your wrist (see Connecting Electrostatic Discharge Wrist Strap for details).

  3. Disconnect the AC power cable from the AC power supply as shown below.

    Disconnecting the AC power cable

  4. Disengage the AC power supply by moving the latch to the left as shown below.

    Disengaging the AC Power supply

  5. Pull on the loop handle to slide the AC power supply out of the 

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    chassis as shown below.

    Disengaging the AC Power supply from the SBC 5000 series chassis

  6. Install the replacement  AC power supply into the 
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    chassis by sliding it forward until you hear the latch click in place.

  7. Reconnect the AC power cable, as shown below.

    Reconnecting the AC power cable

  8. Observe that the POK green LED on the newly-inserted power supply is solid green.
  9. From the application, ensure that no power supply alarms are generated. 

CRU Storage

All 

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CRUs are shipped in electrostatic discharge bags and must be handled using appropriate ESD precautions.

 The storage environment for these CRUs are:

  • Humidity must be less than 95% (non-condensing)
  • Temperature must be between -40C and +70C.

The ESD Susceptibility symbol warns of the presence of Sonus devices susceptible to electrostatic discharge. Do not handle equipment without wearing a properly grounded ESD wrist strap.

 

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