Specifications

AC Power Planning 2-1
Chapter 2
AC Power Planning
2-
This chapter describes the AC power requirements of ftServer V 100, V 200, and V 400
systems. It contains the following sections:
 ‘‘AC Power Overview’’ on page 2-1
 ‘‘Redundant Power Sources’’ on page 2-1
 ‘‘AC Power and HVAC Worksheets’’ on page 2-2
 ‘‘Selecting a UPS Unit for ftServer V 200 and V 400 Systems’’ on page 2-4
 ‘‘Selecting a UPS Unit for ftServer V 100 Systems’’ on page 2-9
 ‘‘Power Cord Summary’’ on page 2-10
AC Power Overview
For fault tolerance, each ftServer V 100, V 200, and V 400 system requires two
separate and independent AC power sources. These power sources feed two UPS
units. The UPS units feed power to a pair of power distribution units (PDUs) inside the
main cabinet that, in turn, distribute power to the system’s components.
Expansion storage-system cabinets also require two separate and independent AC
power sources, each fed by two UPS units. The same UPS units can feed the ftServer
system and any expansion storage-system cabinets. Use one of the UPS models that
Stratus has qualified. See ‘‘Selecting a UPS Unit for ftServer V 200 and V 400
Systems’’ on page 2-4 or ‘‘Selecting a UPS Unit for ftServer V 100 Systems’’ on
page 2-9 for more information.
You must also provide AC power to peripherals located outside the main cabinet, such
as the system console, RSN console server, and RSN modem (if present).
Redundant Power Sources
Each ftServer V 100, V 200, and V 400 system requires two separate and independent
AC power sources: an A-side power source and the B-side power source. Because
either side must be capable of continuing to provide power if power to the other side is
lost, each power source must provide uninterruptible AC power.