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      MPA-HD Power Supply Unit Installation and Removal

      How to insert and remove MPA-HD Power Supply Units

      MP-HD PSU 1

      MPA-HD Power Supply Unit #2 (left), and Power Supply Unit #1 (right)

      important

      MPA-HD Power Supply Unit Information:
       
      • The MPA-HD Power Supply Units (PSU) are shipped separately from the MPA-HD chassis, and will need to be installed prior to use.
      • The MPA-HD supports up to two field-replaceable PSU modules, PSU #1 is on the right and PSU #2 is on the left. 
      • Each AC PSU module can support both 110v/120v AC and 220v/240v AC input sources to support common testing environments.
      • Typically, each AC PSU can provide up to roughly 1000W of power when connected to a 110v/120v AC power source, or up to 2200W of power when connected to a 220v/240v AC power source. Thus, an MPA-HD chassis powered by 110/120v AC input, with more than two MPM-HD test modules, may require two PSU modules.
      • When a single PSU module can adequately provide enough power to meet the system's configuration requirements (inserted into the PSU #1), then PSU #2 should remain covered with blank dust cover when not needed. Or PSU #2 can be equipped with a second PSU for optional load sharing or redundant backup power.
      • Each AC PSU's supports an IEC320 C20 power inlet connector, and requires an IEC320 C19 power cord rated for 15A (included).  It is recommended to plug the AC power cord into the PSU module before connecting it to the wall outlet.
      stop The MPA-HD chassis must be turned off when inserting or removing the Power Supply Unit. Refer to the Shutdown procedure in the MPA-HD User Manual to safely turn off the MPA-HD system. 
      caution Hardware required: #1 Phillips-Head Screwdriver (for PSU slot #2 only). 

      safety  Safe Module Handling:

      • Inserting and removing MPA-HD hardware components should only be performed by authorized and suitably qualified personnel.
      • Thoroughly read all the provided instructions from start to finish, making sure to understand each step clearly, and then execute the actions exactly as outlined without making any assumptions or changes unless explicitly authorized.
      • Prevent foreign objects from entering the MPA-HD chassis while inserting and removing test modules, which could create short circuits or damage internal fans and components.
      • When electrical components are removed from the MPA-HD chassis, always store test modules by themselves in individual ESD protected packaging (with no loose elements such as screws, tools, laser modules, or other test modules).

      ESD danger  Danger of Electrostatic Discharge (ESD):

      • Static electricity can harm sensitive electronic components. Always follow proper ESD procedures when handling MPA-HD electrical components, such as wearing a grounded ESD wrist strap or ESD shoe grounders. 
      • A chassis ground plug is located on the back of the chassis, andMPA-HD ESD terminal a 4 mm banana-jack terminal for an ESD wrist strap is located on the front of the chassis, in the lower-left corner below the “VeEX” logo.

       

      Power Supply Unit Insertion:

      How to insert the Power Supply Unit into the MPA-HD chassis:

      1. Make sure that the MPA-HD chassis is powered off. Refer to the MPA-HD Shutdown Procedure as needed.
      2. Carefully remove the Power Supply Unit (PSU) from its shipping container and protective ESD bag.    
      3. When inserting a second PSU into slot 2, if slot 2 is covered, then remove the four screws and blank faceplate.PSU Blank Faceplate-1
      4. Verify the PSU is oriented correctly, where the release handle is on the right and the extraction handle is on the left.                            IMG_5129
      5. Carefully slide in the PSU until it contacts the backplane socket, then apply enough pressure on the front of the module to fully seat the module’s connector into the backplane socket.                                          MPA-HD_PSU1_(insert)
        • PSU modules are secured in place with the release handle, which make a click sound when fully seated.                                               
      6. The AC PSU supports an IEC320 C20 power inlet connector, and requires an IEC320 C19 power cord rated for 15A (included).  MPA-HD_PSU1_PSU2
        • When connecting the AC power cord, it is recommended to plug the power cord into the PSU module before connecting the other end to the wall outlet. 
            

           

      Power Supply Unit Removal:

      How to remove the Power Supply Unit from the MPA-HD chassis:

      1. Make sure that the MPA-HD chassis is powered off, and the power LED (labeled PWR) is off.
        • The stand-by LED (labeled STBY) will remain lit while the power cable is still plugged in.
      2. Unplug the AC power cord from the AC PSU.
        • The release handle on the AC PSU cannot be moved while the power cord is plugged in.
        • If removing just one of two PSU modules, be sure to remove the PSU from slot #2 (left slot).  When a single PSU module is being used, it must be plugged into PSU slot #1 (right slot).
      3. Wait for the amber LED on the PSU to turn off (20-30 secs) before extracting the PSU module, or before re-inserting the AC power cord.  PSU Amber LED
        • If the power cord is just being unplugged and re-inserted before the amber LED turns off, then the PSU may end up in a non-working state and the MPA-HD will not power up. If this occurs remove the power cord from the wall, wait for the LED to clear, then plug it in again.
      4. Push the release handle to the left to unlock the PSU from the chassis, and use the extraction handle to carefully pull the PSU module out of the chassis.PSU Remove     MPA-HD_PSU1_(remove)
      5. Place the Power Supply Unit on an ESD-protected surface or into an ESD antistatic bag when not in use.
      6. If removing the PSU from slot 2 and a replacement PSU is not being installed into the empty slot, then attach a blank PSU faceplate cover over the open slot using the four screws provided to prevent dust or other foreign objects from entering the MPA-HD chassis. (#1 Phillips-Head Screwdriver required)
      caution To maintain product compliance with EMI requirements, all slots (including unused PSU slots) in the MPA-HD chassis must either be occupied or covered with a blank faceplate when the system is in use.