Hardware options installation 71
This USB storage device contains a dual-SD card module that supports up to two SD, SDHC, or SDXC
storage cards providing data redundancy through a mirrored RAID-1 configuration. This USB storage
device connects to an internal USB connector and is configured upon boot.
To locate the internal USB connector, see "System board components (on page 10)." For more
information, see the Dual 8Gb microSD EM USB storage device documentation on the Hewlett Packard
Enterprise website (http://www.hpe.com/support/8GBDualMicrosd_ug_en).
Redundant power supply option
The redundant power supply option consists of an RPS backplane assembly and two power input
modules. Install the RPS option to improve power efficiency and enable power redundancy. Power
redundancy requires the installation of two power input modules.
When the RPS backplane and a single power input module are installed in the server, you can install or
remove a second power input module without powering down the server.
Power input module and RPS backplane characteristics
• HPE 800 W/900 W Gold AC Power Input Module (744689-B21)
o This module is compatible with the AC RPS backplane (745813-B21).
o The module wattage rating changes depending on whether one or two power input modules are
installed in the server:
— One power input module installed (nonredundant): 900 W
— Two power input modules installed (redundant): 800 W
• HPE 900 W AC/240 V DC Gold Power Input Module (775595-B21)
o This module is compatible with the AC/240 V DC RPS backplane (814835-B21).
o The 240 V DC function of this module only applies to server installations based in China.
For more information about the power supply features, specifications, and compatibility, see the Hewlett
Packard Enterprise website (http://www.hpe.com/servers/powersupplies).
Installing the redundant power supply option
To install the component:
1. Power down the server (on page 15).
2. Access the product rear panel (on page 17).
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