User's Guide

Chapter 2 Description
Expansion Modules
Scalar i2000 Planning Guide 19
Power System 2
The library supports single and redundant power configurations. The
single configuration has a single AC line input and single DC power
supply. The redundant configuration has dual AC line input and dual DC
power supplies. You can hot swap a power supply if you have a
redundant power supply. You can hot add a second power supply.
The power system consists of the following:
• Power supply
• Power distribution unit
• AC power cord
A single power switch, located on the front door, turns on and off all
power for the control module and attached expansion modules. Each
power distribution unit has a second circuit breaker, located in the rear of
the module, that controls the module power supply output. The power
supply has three LEDs that provide status information. The power
system also has four fuses for system protection.
Expansion Modules
Expansion modules enable the library to expand by adding space for tape
drives, an I/E station, and cartridges. Each expansion module adds from
300 through 456 LTO or from 250 through 380 SDLT cartridge slots
depending on the number of tape drives installed and whether an I/E
station is installed. See
figure 9 on page 20 for location information. The
library’s maximum configuration includes up to seven expansion
modules for a total of eight modules. Expansion modules can be added
only to the right of the control module.
The expansion modules can accommodate the following functional units:
• I/O management unit
• Tape drives
• Cartridge storage
• I/E station (optional)
• AC power compartment (required only if drives are added)