IBM 7014 T00, Manual

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b. Connect the -48V return wire to the position matching the circuit breaker position on the PDP
return, i.e. if the -48V DC wire is connected to circuit breaker A3, the return wire should be
connected to the A3 position on the return bus bar.
c. Connect the ground wire to the matching position on the copper ground bar.
d. Route the DC power cable to the system component and connect it to power supply 1 (A).
e. If there are additional units or power supplies to be connected to the A side of the PDP, repeat step
2 for each additional unit/power supply.
Attention: When there are more than two power supplies in the unit being installed, refer to
the unit documentation to ensure that the DC wiring is connected properly to ensure proper
power redundancy.
f. After all the A side connections are complete, replace the A side plastic cover. To replace the
plastic cover, complete the following steps:
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 have turned off the -48V DC B power sources that are connected to the PDP.
4. After the -48V DC B power sources is turned off, be sure there is a tag or label over the B power source
switch or fuse (lock-out/tag-out) to indicate that the B power source has been turned off intentionally.
5. Remove the B side plastic bus bar covers. To remove the B side plastic bus bar covers, complete the
following steps:
a. Remove the two retaining screws from B side cover.
b. Remove the B side cover.
6. Connect DC power cable for power supply 2 (B) to the PDP.
a. Connect the -48V DC wire to the circuit breaker lug on the B side that matches the A side position,
i.e. if the A side -48 V DC wire is connected to circuit breaker A3, the wire should be connected 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.
b. Connect the -48V return wire to the position matching the circuit breaker position on the PDP
return, i.e. if the -48V DC wire is connected to circuit breaker B3, the return wire should be
connected to the B3 position on the return bus bar.
c. Connect the ground wire to the matching position on the copper ground bar.
d. Route the DC power cable to the system component and connect it to power supply 2 (B).
e. If there are additional units or power supplies to be connected to the B side of the PDP, repeat step
6.
Attention: When there are more than two power supplies in the unit being installed, refer to
the unit documentation to ensure that the DC wiring is connected properly to ensure proper
power redundancy.
f. After all the B side connections are complete, replace the B side plastic cover. To replace the
plastic cover, complete the following steps:
1) Position the cover over the B side connections.
2) Install the two retaining screws for the B side cover.
g. Replace the PDP top cover. To replace the PDP top cover, complete the following steps:
1) Position the PDP top cover onto the PDP.
2) Install the four retaining screws.
36 Power Systems: Racks and rack features