HP Server rp7420 Installation Guide, Fifth Edition - HP 9000 rp7420 Server - Page 59

Power Source versus. Power Distribution, Power Source B

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Cabling and Power Up AC Input Power If two separate power sources are available, the two power supplies can be plugged into the separate power sources, increasing system reliability should one power source fail. Figure 4-2 Power Source versus. Power Distribution BPS 0 BPS 1 A0* A1* B0* B1* Power Source A Power Source B *180-269 VAC WARNING Voltage is present at various locations within the server whenever a power source is connected. This voltage is present even when the main power switch is in the OFF position. To completely remove power, all power cords must be removed from the server. Failure to observe this warning could result in personal injury or damage to equipment. NOTE System firmware prevents boot when a single power cord configuration is detected. Chapter 4 59

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Chapter 4
Cabling and Power Up
AC Input Power
59
If two separate power sources are available, the two power supplies can be plugged into the separate power
sources, increasing system reliability should one power source fail.
Figure 4-2
Power Source versus. Power Distribution
WARNING
Voltage is present at various locations within the server whenever a power source is
connected. This voltage is present even when the main power switch is in the OFF
position. To completely remove power, all power cords must be removed from the
server. Failure to observe this warning could result in personal injury or damage to
equipment.
NOTE
System firmware prevents boot when a single power cord configuration is detected.
BPS 0
BPS 1
A0*
A1*
B0*
B1*
*180-269 VAC
Power Source A
Power Source B