APC RAID Subsystem SCSI-SATA II Specifications Page 86

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Appendix B Uninterruptible Power Supply
Appendix B
Uninterruptible Power Supply
B.1. Uninterruptible Power Supply Overview
An uninterruptible power supply (UPS) is a separately purchased battery backup unit that
can be connected to an RAID subsystem. If the UPS is sufficiently large, it can power the
whole subsystem in the event of an AC power failure allowing the RAID subsystem to
safely distribute the on-going I/O processes onto the hard drives.
B.2. Compatible UPS Supplies
The APC SMART UPS series is compatible with the Falcon subsystems.
B.3. Serial Communication Cables
Part Number: IFT-9270CUPSCab-0030
The customized audio-jack-to-DB9 serial communication cable for UPS monitoring
should be purchased separately. This cable is used to connect the controller module(s) on
a subsystem to a UPS. If you wish to use a UPS with your subsystem, use an included
audio jack-to-DB9 serial communication cables (see Figure B-1).
Figure B-1: Audio-Jack-to-DB9 Serial Communication Cable
CAUTION!
The pinouts on the audio jack-to-DB9 serial cable used to connect to the UPS are
different from the pinouts on the serial cables that are used to connect a PC running a
terminal program. When connecting the UPS device, please be sure to use the correct
cable.
Uninterruptible Power Supply Overview B-1
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