2.6.3
Rear Panel Components
Tape Drives
Power
Supply
Modules
Power Inlet, Line Fuse and Rocker Switch
Expansion
Card Slots
Control
Electronics
Figure 2-4 RLS-85XX Rear Panel Details
2.6.3.1
N+1 Power Option
The RLS libraries have a distributed power system. The RLS-85XX models can have
up to four power supply modules (PSM), which accommodate a range of power
requirements. The RLS-8350 models can accommodate a maximum of two PSM’s. The
N+1 Option adds an extra module, ensuring system redundancy.
The PSMs operate in parallel, sharing the load. This reduces the stress on the
individual power supplies and greatly extends their service life. When the N+1 Option
is installed, the library will continue to operate if one module fails. The remaining
power supply module or modules will power the RLS indefinitely. The library and
tape drives will continue to function, uninterrupted by the failure and subsequent
replacement of the failed PSM. A green "Power Good" LED indicates that a PSM is
operating properly. A failed PSM causes an alarm condition.
All PSMs supply regulated 24-volts DC to the RLS-8350/85XX. The unit is powered
from AC mains of 100- to 240-volts, 50 or 60 Hertz.
511000 Rev. F
Product Description
2-7