Connecting the system component power to the PDP

Install the component -48V dc power cable assemblies into the PDP. Power cables are supplied with the IBM device that you want to install.

1. If you already applied dc power to the rack, continue with the next step. If you have not applied dc power to the rack, go to step 2.
   DANGER

   If you do not disconnect the -48V dc power sources to the rack, the cable installation must be completed by a qualified electrician.

   1. Remove the cable channel cover. To remove the cable channel cover, complete the following tasks:
      1. Loosen the four retaining screws.
      2. Align the larger openings in the cover with the retaining screw heads.
      3. Lift the cover up to clear the retaining screws and remove it.
   2. Remove the PDP top cover. To remove the PDP top cover, complete the following tasks:
      1. Remove the four retaining screws.
      2. Remove the PDP cover.
      DANGER

      Ensure that you have turned off the -48V dc A power sources that are connected to the PDP before you continue.

   3. After the -48V dc A power sources are turned off, be sure that a tag or label is present over the A power source switch or fuse (lock-out/tag-out) to indicate that the A you intentionally turned off the power source.
   4. Remove the A side plastic bus bar cover. To remove the A side plastic bus bar cover, complete the following tasks:
      1. Remove the two retaining screws from A side cover.
      2. Remove the A side cover.
   5. Continue with step 2.
   CAUTION:
   Ensure that the circuit breaker the unit will be connected to has the proper current rating, so that the unit is properly protected.
2. Connect the dc power cable for power supply 1 (A) to the PDP. To connect the dc power cable for power supply 1 (A) to the PDP, complete the following task:
   Note: Tighten the nuts that secure the output connections to 5.6 newton-meters (50 inch\pounds), maximum.
   Note: Tighten the screws that secure the ground wire to the ground bus bar to 3 newton\meters (26.5 inch-pounds), maximum.
   1. Connect the -48V dc wire to the first available circuit breaker lug on the A side.
   2. Connect the -48V return wire to the position that matches the circuit breaker position on the PDP return, for example, if the -48V dc wire is connected to circuit breaker A3, connect the return wire to the A3 position on the return bus bar.
   3. Connect the ground wire to the matching position on the copper ground bar.
   4. Route the dc power cable to the system component and connect it to power supply 1 (A).
   5. If you must connect more units or power supplies to the A side of the PDP, repeat step 2 for each additional unit/power supply.
      Attention: If there are more than two power supplies in the unit that is being installed, refer to the unit documentation to ensure that the dc wiring is connected properly. This ensures that you have power redundancy.
   6. After all the A side connections are complete, replace the A side plastic cover. To replace the plastic cover, complete the following tasks:
      1. Position the cover over the A side connections.
      2. Install the two retaining screws for the A side cover.
3. If power was previously applied to the rack, restore the -48V dc A side power to the PDP. Otherwise, go to step 6.
   DANGER

   Ensure that you turn off the -48V dc B power sources that are connected to the PDP.

4. After you turn off the -48V dc B power sources, ensure that a tag or label is placed over the B power source switch or fuse (lock-out/tag-out) to indicate that you intentionally turned off the B power source.
5. Remove the B side plastic bus bar covers. To remove the B side plastic bus bar covers, complete the following tasks:
   1. Remove the two retaining screws from B side cover.
   2. Remove the B side cover.
6. Connect dc power cable for power supply 2 (B) to the PDP.
   1. Connect the -48V dc wire to the circuit breaker lug on the B side that matches the Aside position, for example, if the A side -48 V dc wire is connected to circuit breaker A3, connect the wire to the B3 position. If the B position is already used, connect the -48V dc wire to the first available circuit breaker lug on the B side.
   2. Connect the -48V return wire to the position that matches the circuit breaker position on the PDP return. For example, if the -48V dc wire is connected to circuit breaker B3, connect the return wire to the B3 position on the return bus bar.
   3. Connect the ground wire to the matching position on the copper ground bar.
   4. Route the dc power cable to the system component and connect it to power supply 2 (B).
   5. If you must connect more than one unit or power supply to the B side of the PDP, repeat step 6.
      Attention: If there are more than two power supplies in the unit that you are installing, refer to the unit documentation to ensure that the dc wiring is connected properly. This ensures that power is redundant.
   6. After all the B side connections are complete, replace the B side plastic cover. To replace the plastic cover, complete the following task:
      1. Position the cover over the B side connections.
      2. Install the two retaining screws for the B side cover.
   7. Replace the PDP top cover. To replace the PDP top cover, complete the following task:
      1. Position the PDP top cover onto the PDP.
      2. Install the four retaining screws.
   8. Install the cable channel cover. To install the cable channel cover, complete the following task:
      1. Position the cover over the retaining screws and align the larger openings in the cover with the retaining screw heads.
      2. Set the cover down over the retaining screws and slide it toward the rear of the rack so that the screws are now located in the narrow slots.
      3. Tighten the four retaining screws.
7. If power was previously applied to the rack, restore the -48V dc B side power to the PDP. If power was not previously applied to the rack, apply power to both the A and B sides of the PDP.
8. Continue with Installing the system component circuit breakers in the PDP.