Swapping SBC-5XXX-PSUAC (451-01025) Power Supplies with SBC-5400-PSUAC-N (451-01061) on SBC 5400

SBC 5400 systems configured for AC power are equipped with either single or dual redundant AC power supplies. These are Customer Replaceable Units (CRU). The original SBC-5400-PSUAC power supply has reached its End-of-Life and can be replaced by the SBC-5400-PSUAC-N. Only when a customer requests a replacement and Ribbon's stock of spare 451-01025 PSUs is depleted will the customer be sent two newer 451-01061 PSUs and adapter kits. In this case, both PSUs must be replaced at the same time.

This is the only case when the EOL supply should be replaced with the new supply.  There is no requirement to install the 451-01061 PSU if spares of the 451-01025 are still available.

Because the new supply is shorter and narrower, each power supply slot needs an adaptor tray to accept the new unit. In the figure below, the left supply is the original SBC-5400-PSUAC AC supply, and the right supply is the replacement SBC-5400-PSUAC-N supply:

Prerequisites

• Ensure the BMC firmware version is 3.27 or higher. If both AC supplies fail, you can install the new supplies with the CSC100 removed to update the BMC firmware. After the update, once the CSC100 is reinstalled, you must perform the BMC firmware update to update the BIOS on the CSC100. The 3.27 firmware was released under the SBC 11.1.1R0 software bundle on the Ribbon Support Portal. This release, or any newer release, will recognize this new power supply.
  
  
  Warning

  Before proceeding with the PSU swap, the Baseboard Management Controller must run V3.27 or later to recognize the new supply. Failure to do so may result in a system that will not power up.

  Read Appendices A-C for further assistance.

• You must replace both the power supplies. The system is not intended to operate with a combination of Tectrol and GE power supplies.
• Shut down the chassis gracefully before performing the procedure to prevent SSD drive corruption. For more details, refer to Appendix B.

SBC 5400-PSUAC and 5400-PSUAC-N AC Power Supply States

Shut Down the System

Because the new power supply will not work alongside the old power supply, you must swap both power supplies at the same time. Therefore, you must ramp down and stop all traffic before proceeding. The system should be shut down gracefully before removing the power from the chassis.

Parts and Tools Required

• Electrostatic discharge (ESD) strap
• Replacement AC power supply
• Adapter tray
• C19 to C13 power adapter

Replacing a Power Supply

Perform the following procedure to replace a power supply:

Start

1. Verify the POK LED of both LEDs is blinking Green.
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 cables from both AC power supplies, as shown below.
   
4. Disengage the AC power supply by moving the latch to the left, as shown below.
   Pull on the loop handle to slide the AC power supply out of the SBC 5400 chassis.
   
5. The adapter trays must be installed into the chassis before the new power suppliers are installed.
   The adapter tray before insertion:
   
6. Line up the adapter tray with the bottom PSU slot as shown below, resting the bottom edge of the sheet metal tray on the bottom of the PSU slot.
   
   
7. Push the tray into the chassis and push on the right edge until you hear a click when the latch engages on the right side.  Install the top tray in the same fashion.
   
   
8. Install the replacement AC power supplies into the SBC 5400 chassis by sliding each one forward until the locking latch on the PSU clicks in place.
   
   After both new supplies are installed:
   
9. The old PSU has a different connector (C19) than the new PSU (C13). A plug adapter (P/N 401-00186) has been provided to adapt the current cable to the new supply.
   
10. Connect the C19 connector from the original power supply to the plug adapter.
    
11. Insert the plug adapter into the newly installed PSU. Do this for both power cords.
    
    
    The POK green LED on the newly inserted power supply may flash initially but will resolve to solid green.
    The system should restart after plugging in at least one of the AC supplies.
12. Once booted, 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.
  
  

Appendix A - Checking and Updating BMC Firmware

Use the procedure below to check and update the BMC firmware.

Start

1. Obtain a valid BMC IP address. For more information, refer to Appendix C.
2. Enter the BMC IP address and log on to the BMC GUI.
   Username: root
   Password: superuser
3. Select Login.
4. Check and update the BMC firmware. For more information, refer to Upgrading the BMC and BIOS Firmware.

Appendix B - Gracefully Shutting Down the Host CPU from the BMC GUI

Use the procedure below to shut down the system gracefully from the BMC GUI or HOST processor.

Start

1. Connect to the BMC GUI using the BMC IP address. Enter the credentials and click Login. See Appendix C to obtain the BMC IP address.
   
   
   
2. On the BMC GUI, click the Remote Control tab and then select Server Power Control.
   
   
   
3. Select Power Off Server, and then select Perform Action.
   

Appendix C - Determining the BMC IP Address from the BMC Serial Port

Use the following steps to determine the BMC IP address from the BMC serial port.

Start

1. If the IP address is unknown and there is a serial connection to the BMC module, log in to the BMC Console.

   Log in to BMC Console

   BMC00106B03CB0C login: root
   Password: 
   Executing [-/bin/sh]
   
   BusyBox v1.13.2 (2014-05-23 07:42:17 EDT) built-in shell (ash)
   Enter 'help' for a list of built-in commands.
   
   

2. Enter ifconfig to find the BMC ip-address to use for the GUI.

   Enter ifconfig

   # ifconfig 
   eth0      Link encap:Ethernet  HWaddr 00:10:6B:03:CB:0C  
             inet addr:10.2.12.252  Bcast:10.2.12.255  Mask:255.255.255.0
             UP BROADCAST MULTICAST  MTU:1500  Metric:1
             RX packets:0 errors:0 dropped:0 overruns:0 frame:0
             TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
             collisions:0 txqueuelen:1000 
             RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
             Interrupt:2

   
   You can also enter solssh to connect directly to the host processor and  perform the shut down.
   
   

3. Type "n" when prompted to enter maintenance mode.

   Enter solssh

   #  solssh
   -/bin/sh: solssh: not found
   # /usr/local/bin/solssh
   Hit <Enter><Esc>t to exit solssh
   --------------------------------------------------------------------------------------
   Terminal is serial port. Dropping to Maintenance shell for debug purposes
                           Please note that this maintenance shell is only intended for use by
                           Authorized,qualified personnel for maintenance purposes.
                           If you are not a A,Q personnel, STOP.
                           You risk making the card non-functional by attempting any operations using
                           this shell.
   --------------------------------------------------------------------------------------
   Enter Maintenance Mode?(y/n):n
   
   

4. Once the host processor starts up, log in and then type init 0 to shut down the host processor.

   Enter init 0 to Shutdown Host Processor

   ConnexIP 02.01.01-R000 GNU/Linux 6.0 connexip.sonusnet.com ttyS0
    
   connexip.sonusnet.com login: linuxadmin
   Password: <linuxadmin password>
   
   linuxadmin@connexip.sonusnet.com:~$ su
   Password: <root password>
   [root@connexip.sonusnet.com linuxadmin]# init 0