Product specifications

C-
1
Appendix C
Uninterruptible Power Supply
C.1 Uninterruptible Power Supply Overview
An uninterruptible power supply (UPS) is a separately purchased battery backup unit that is
connected to an EMD Storage
subsystem. If the UPS is sufficiently large, it should allow the
whole subsystem to safely finish the ongoing I/Os in the event of an AC power failure.
C.2 Compatible UPS Supplies
The APC SMART-UPS 700VA is compatible with the SecurStor subsystem.
C.3 Serial Communication Cable
The subsystem is shipped with a customized audio-jack to DB9 serial communication cable.
The cable is used to connect the controller module on a subsystem to a PC hyperterminal for
subsystem management. If you wish to use a UPS with your subsystem, an additional audio-
jack to DB9 serial communication cable (see Figure C-24) must be purchased.
Figure C-24: Audio-
Jack to DB9 Serial Communication Cable
CAUTION!
The pinouts on the COM2 audio-jack to DB9 serial cable used to connect
to the UPS are different from the pinouts on the serial cable that was
shipped with the subsystem. When connecting the UPS device, please
make sure you use the correct cable type. The cable pinouts are listed in
Appendix B.
C.4 Connecting the UPS to the Subsystem
C.4.1 Connect the PSU Module Power Cords
The two (2) power cables shipped with the subsystem must be plugged into the
power cord sockets in the rear of the PSU modules. The plug at the other end of the