DF56 – User’s Manual
8
System powered by two power supplies
Note that this system, for greater efficiency, is optimized for power distribution by groups of rows of
racks. Thus, a power supply powers a whole number of rows it supports. However, in rare cases,
with long rows or many modules with great consumption in the same row, there is the option to add
power supplies in the middle of the row, dividing the power within this row. In this case, the power
supply added powers only the modules positioned on the right in the same row, up to the end, or
even where there is another power supply added. In the rack where the power supply was added, in
this scheme, the
W1
jumper must be cut and left lateral connection terminal (+5 Vdc) must be
disconnected (collapsed).
In this system, the DF56 modules must be their
CH1
jumper always configured in
R
, even if they are
not in redundant pairs.
ATTENTION
A mixture of these power supplies with the
CH1
configured in
R
and in
E
in any
DFI302
system, is not allowed!
On
DF92
, the pair of redundant power supplies must be installed in the first and second slots.
On
DF93
is recommended the placement of the redundant pair in the first and second slots, but it
can be installed in any slots if necessary.
The system has diagnostic for voltage level distributed to racks. It also supports modules with great
power consumption in any place on the bus. Nevertheless, is recommended to place those modules
close to the power supplies, to avoid unnecessary power transmission.
For systems based on DF78 and DF1A Racks
1. Observe the maximum current values from the power supply module specification. The limit for
DF56 is 3 A.
