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SBC 5400 systems configured for AC power are equipped with 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-5XXX-PSUAC.

In a dual redundant power supply configuration, the power supplies are hot-swappable, meaning that they may be replaced without powering down the SBC 5400 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 unit. 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 Ribbon Customer Support if required.

SBC 5XXX-PSUAC AC Power Supply States

The PSU LEDs 

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. 

The accessory kit includes an ESD strap to prevent damage from electrostatic discharge. See Connecting ESD Wrist Strap to install it.

Replacing a Power Supply

Perform the following procedure to replace a power supply:

Start

  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 ESD Wrist Strap for details).

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

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

  5. As shown below, pull on the loop handle to slide the AC power supply out of the chassis.

  6. Install the replacement  AC power supply into the SBC 5400 chassis by sliding it forward until you hear the latch click in place.

  7. Reconnect the AC power cable to the rear of the device.

  8. Observe that the POK green LED on the newly inserted power supply is solid green.
  9. Ensure that no power supply alarms are generated from the application. 

CRU Storage

All SBC 5400 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 Ribbon devices susceptible to electrostatic discharge. Do not handle equipment without wearing a properly grounded ESD wrist strap.