IBM TotalStorage SAN140M, Installation And Service Manual

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11 Chapter 1: General information
Figure 7
Ten Gbps form-factor pluggable (XFP) transceiver
Power supply
Redundant, load-sharing power supplies step down and rectify
facility input power to provide 48-volt direct current (VDC) power to
director FRUs. The power supplies also provide overvoltage and
overcurrent protection. Either power supply can be replaced while
the director is powered on and operational.
Each power supply has a separate backplane connection to allow for
different AC power sources. The power supplies are input rated at
180 to 264 volts alternating current (VAC). The faceplate of each
power supply provides the following status LEDs:
• A green AC OK LED illuminates if the power supply is
operational and receiving AC power.
• A green DC OK LED illuminates if the power supply is
operational and producing DC power.
• A red FAULT LED illuminates if the power supply fails.
AC module
The AC module is located at the bottom rear of the director. Either AC
module can be replaced while the director is powered on and
operational. The module provides:
• Two single-phase, 220 VAC, power connectors.
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