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Note: For a translation of this notice, see the System Unit Safety Information manual.
DANGER
An electrical outlet that is not correctly wired could place hazardous voltage
on metal parts of the system or the devices that attach to the system. It is the
responsibility of the customer to ensure that the outlet is correctly wired and
grounded to prevent an electrical shock.
Before installing or removing any additional devices to or from the system,
ensure that the power cables for those devices are unplugged before the signal
cables are connected. If possible, disconnect all power cables from the existing
system before you add a device.
Use one hand, when possible, to connect or disconnect signal cables to prevent a
possible shock from touching two surfaces with different electrical potentials.
During an electrical storm, do not connect cables for display stations, printers,
telephones, or stations protectors, for communications lines.
3. Switch off power on all disk drive drawers in the rack.
4. Switch off power to all external devices attached to the system unit, and then unplug the
device power cords from the electrical outlets.
5. Except for any circuit breaker that is connected to an attached system unit, set all circuit
breaker switches to the off position (down).
Note: For a translation of these notices, see the System Unit Safety Information manual.
CAUTION:
Energy hazard, remove power before servicing. Disconnect two power supply cords.
Notes:
1. An electrical hazard from an external -48 V dc power source exists in this unit. To
2. Because many external devices can be connected to the system unit, it may be
Front View of Power
Distribution Panel
50-Amp Circuit
Breaker Switch
(EIA23) Input A
On Position
4-10
Service Guide
prevent electrical shock, ensure that power to this unit is off before servicing.
impractical for you to switch off power to all the devices and unplug their power
cords.
(Up)
50-Amp Circuit
Breaker Switch
(EIA23) Input B
Off Position
(Down)
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