Installing A Hot-Swap Dc Power Supply - IBM x3550 M4 Type 7914 Installation And Service Manual

Installing a hot-swap dc power supply

Observe the following precautions when you install a hot-swap dc power supply.
The following notes describe the type of power supply that the server supports
and other information that you must consider when you install a power supply:
v Before you install an additional power supply or replace a power supply with
one of a different wattage, you may use the IBM Power Configurator utility to
determine current system power consumption. For more information and to
download the utility, go to http://www.ibm.com/systems/bladecenter/
resources/powerconfig.html.
v The server comes with one hot-swap 12-volt output power supply that connects
to power supply bay 1. The input voltage is -48 V dc or -60 V dc auto-sensing.
v Before you install a dc power supply in the server, you must remove all ac
power supplies. Do not use both ac and dc power supplies in the same server.
Install up to two dc power supplies or up to two ac power supplies, but not a
combination.
v Power supply 1 is the default/primary power supply. If power supply 1 fails,
you must replace the power supply with the same wattage immediately.
v You can order an optional power supply for redundancy.
v These power supplies are designed for parallel operation. In the event of a
power-supply failure, the redundant power supply continues to power the
system. The server supports a maximum of two power supplies.
Regulations
v It is the customer's responsibility to supply the necessary power cable.
To reduce the risk of electric shock or energy hazards:
– Use a circuit breaker that is rated at 25 amps.
– Use 2.5 mm
– Torque the wiring-terminal screws to 0.50 ~ 0.60 newton-meters (4.43 ~ 5.31
inch-pounds).
For more information, see "Statement 34" on page 78.
v If the power source requires ring terminals, you must use a crimping tool to
install the ring terminals to the power cord wires. The ring terminals must be
UL approved and must accommodate the wire that is described in the
above-mentioned note .
Statement 29
CAUTION:
This equipment is designed to permit the connection of the earthed conductor of
the dc supply circuit to the earthing conductor at the equipment.
This equipment is designed to permit the connection of the earthed conductor of
the dc supply circuit to the earthing conductor at the equipment. If this connection
is made, all of the following conditions must be met:
2
(12 AWG) at 90°C copper wire.
Chapter 2. Installing optional devices
75