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3.
Connection Configuration
This chapter explains the connection configuration of the ETERNUS AF.
Power Supply Connection
Connect the power cords of the ETERNUS AF to the power sockets, the UPS sockets, or the power control unit
sockets.
For details about the types and number of power sockets that can be used for the ETERNUS AF, refer to "Power
Socket Specifications" in "Site Planning Guide".
Input Power Supply Lines
For details on input power supply lines, refer to "Site Planning Guide".
UPS Connection
It is recommended that an Uninterruptible Power Supply System (UPS) is used as the power supply source for the
ETERNUS AF to cope with power outages and momentary voltage drops in the normal power supply.
When one of the power supply lines fails for redundantly configured UPS units with two power supply lines, all of
the power for the ETERNUS AF must be supplied from the other line. Select a UPS that can supply sufficient
power so that the total value of the power requirements does not exceed the UPS output capacity in case only
one power supply line is available.
For details about the necessary UPS output capacity, refer to the specifications of the UPS that is used.
A UPS must satisfy the following conditions:
●
Rating Capacity
Secure a sufficient rating capacity for the total value of the maximum power requirements for the enclosures
that are to be installed.
For the maximum power level requirements of each enclosure, refer to "Installation Specifications" in "Site
Planning Guide".
●
Supply Time
The total time for the server to shut down and for the ETERNUS AF to power off must be taken into
consideration for the power supply time of the battery.
●
Switching Time during Power Failure
The normal power supply must be switched to UPS output within 15ms after a power failure occurs.
●
Socket Type
If the power plug type and the socket type of the UPS do not match, it is necessary to equip the UPS (AC
output) with an appropriate type of socket. Request a qualified electrician to perform the necessary work to
make terminal block connections available.
●
Power Supply Configuration
If a UPS is used, make sure that it supplies power to all the enclosures.
Configurations where the controller enclosure is powered by the UPS while the drive enclosures are powered
directly from AC are not supported.
133
Design Guide
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