IBM BNT RackSwitch G8124, Руководство по установке

Страница: 22 / 88

DANGER
An electrical outlet that is not correctly wired could place hazardous
voltage on the 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. (D004)
Each power supply can be connected to a separate AC circuit to mitigate the risk of
down time during a power failure. When used in a redundant configuration, the dual
power supplies have a load-sharing capability that enables each power supply to
operate at approximately 50 percent of full load. Using redundant power can
minimize the power disruption during a power supply failure and extend the
expected lifetime of each power supply by operating normally in a conservative
power mode.
There is no power switch on the G8124; the switch unit powers up when power is
supplied through the power cords.
The Power Supply LED indicates the status of the power supplies. The LED flashes
when only one power cord is connected, and is steady when both power cords are
connected and operating.
DC power supply
The DC-powered G8124 has two redundant 250 W DC-DC power supplies,
operating from 42V to 60V. Each internal power supply has a DC filter input on the
rear panel. The DC power sources are connected to the G8124 via the mating
connector cable assemblies provided. One end of the cable is connected to the
G8124 and the three DC-input leads connect the DC-input power supply to the site
power source. The pigtail end of the cable is color coded, as follows:
Table 1. Color Code
Color Function
Black Negative (-48V)
Red Positive (return)
Green Ground
CAUTION:
The product may be equipped with a hard-wired power cable. Ensure that a
licensed electrician performs the installation per national electrical code.
(C022)
6
IBM System Networking RackSwitch G8124 and G8124-E: Installation Guide