User Service Guide, Third Edition - HP Integrity cx2620 Server

Connecting Cables
This section provides information on cables and cable connections.
DC Input Power
The server comes with two power supplies installed each powered from its own power cable.
The input for each connector is rated for -48 VDC (-40 to -72 VDC) at up to 15 amps maximum.
The server functions normally with only one power supply installed, but N+1 redundancy
requires that both power supplies are used during normal operations. Under normal operating
conditions, the two power supplies share the load.
Figure 3-26 shows the power supply rear view.
Figure 3-26 Power Supply Rear View
WARNING! Ensure that the system is powered off and all power sources are disconnected
from the server prior to removing or installing server hardware unless you are removing or
installing a hot-swappable or hot-pluggable component.
Voltages are present at various locations within the server whenever a DC power source is
connected. This voltage is present even when the main power switch is turned off.
Failure to observe this warning can result in personal injury or damage to equipment.
DC Power Terminal and Wire Connection
WARNING! Always check that the power cable is not connected to a power source before
attempting to connect the power cable to server power supply terminals. Failure to observe this
warning can result in personal injury or damage to equipment.
WARNING! Failure to use the appropriate wire and terminal lugs when connecting DC power
to the server can result in personal injury or damage to equipment.
A DC power terminal block is provided at the rear of each DC power supply. You must use all
four terminals (2+ and 2-). HP recommends a minimum #12 America wire gauge (AWG) or larger
82 Installing the System