Note: For a translation of the following notice, see the 7133 Serial Disk Systems and
SSA Adapters: Translated Safety Notices manual.
DANGER
In the following step you are going to remove the power cable. This cable is
live if the rack power distribution unit or battery-backup unit is still switched
on.
Step 6. Remove the power cables
4
from the back of the 7133.
Step 7. To return power to the 7133:
a. Reinstall the power cables
4
.
Attention:
v
Never use power cables from a 7133 Model 010, 020, 500, or 600 to
connect a 7133 Model D40 to the mainline power outlet. Use only
the shielded power cables that are supplied with the 7133 Model
D40.
v
On −48 volt models, ensure that one power supply assembly is
connected to power source A in the rack, and that the other is
connected to power source B (see the 7133 Model D40 Serial Disk
System: Installation Guide for details).
b. Switch on both power supply assemblies. For each assembly, push the
PWR/FAULT RESET switch
5
upward.
Note: On early power supply assemblies, pull the switch outward, then
push it upward.
Power is restored to the 7133. You do not need to press the power switch.
Note: The 7133 Models D40 and T40 have no power sequencing. All the disk
drive modules start their power sequence when the input voltages are
inside the specified limits. Their motors are started under control of the
SSA attachments in the using system. To prevent the need for
excessive electrical current, the disk drive module motors are not all
started together. Up to eight disk drive modules can be started together.
At least 10 seconds must elapse before the next group of motors is
started. Normally, all the disk drive module motors are running in less
than 30 seconds from the time the 7133 is switched on.
Chapter 3. Removal and Replacement Procedures
147
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