RX900 S2 Operating Manual 71
Hardware installation
5.4 Connecting the server to the mains
V CAUTION!
The server supports a mains voltage in the range of 200 - 240 V. You may
only operate the server if its rated voltage range corresponds to the local
mains voltage.
I Phase redundancy is possible in regions, where a single phase provides
200 - 240V; in other regions with lower single phase voltage, two phases
must be coupled and complete phase redundancy thus is not possible.
Installation requirements
The power subsystem consists of:
● Up to 4 Power Supply Units (PSU) which convert the local mains voltage to
an output voltage of 12 V DC, 5VL.
● A Power Distribution Board (PDB) which connects to the power supply units
and distributes power to each server component.
The total system is rated 200 - 240 V, 50/60 Hz, 28/14 A. Each hot-plug power
supply unit can be replaced during operation without affecting the system
functionality (see "Hot-plug power supply units" on page 105).
The system can be configured to support *True AC redundancy or non-AC
redundancy, see table 3.
I *True AC redundancy is recommended for systems used for critical
business applications. This will result in the system to continue operation
during a power failure as the redundant part of the subsystem is plugged
into a separate AC source [e.g. uninterruptable power supply (UPS)).
AC redundancy is available in a 1+1 (with 4 CPUMEMR installed) or a 2+2 (with
more than 4 CPUMEMR) configuration when half the power supply units are
plugged into a main AC source and the remaining are plugged into a separate
AC source (e.g. UPS).
For systems not requiring AC redundancy, the power supply subsystem can be
configured with 2, 3 or 4 power supply units. The power supply units can be
connected to a single AC source or to multiple AC sources.
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