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Active Loads
C
7.4.7
ONNECTORS
M
AINFRAME
The Active Load modules will operate from a wide variety of AC and
DC input power sources, as distributed through the Mainframe.
Although the Mainframe could be connected to either single-phase or
three-phase AC power, the modules have single-phase inputs. They
are connected to the source, through the Mainframe, either phase-to-
neutral or line-to-line, depending on the available source voltage. The
power source voltage must be within the range of 90–264VAC at 47-
63Hz and 400Hz, or 210-300VDC. The input voltage ranges are
continuous, and do not require any manual setup.
CAUTION
Exceeding the maximum rated Mainframe AC/DC input voltage could
result in damage to the module.
The Mainframe distributes the input power through backplane
connectors to three groups of four slots connected in parallel. The
groups are connected to separate pair of pins in the Mainframe rear
panel AC/DC input connector (one line and return per connection); the
connector has six power pins plus ground. Balance in phase currents
can be achieved only if the power modules are located in the
Mainframe so that equal distribution between the three groups of slots
is maintained, and if the same load is applied to the set of modules in
each group.
The load applied to a particular Mainframe AC/DC input line is
dependent on the location of the modules in the Mainframe slots. The
slots are grouped in sets of four: Slot 1-4, Slot 5-8, and Slot 9-12. Slot
1 is the left-most slot, as viewed from the front (Figure 7-5). Each of
the four slots is supplied by one of the AC/DC input lines. In a double-
width and triple-width module, the module connector is located so that
it mates to a backplane connector in the right-most slot, as viewed
from the front of the Mainframe. Refer to Table 7-1 for Mainframe
input connector pinout and power allocation to the Mainframe slots.
7-16
AC/DC I
NPUTS
ReFlex Power™
M380056-01 Rev L
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