Unpacking And Examining The Pca; Storage; Checking Power Requirements; Power Availability Formula - HP 27140A Hardware Reference Manual

Unpacking and
Examining the
peA
Storage
Checking Power
Requirements
Power Availability
Formula
2-2 Installation
I
Configuration .
Remove the PCA from its protective envelope and place it
on anti-static
material
in
a clean workspace. Inspect the card itself for damage or
miss-
ing parts, and verify the part number. Also, check the other subassemblies
for damage.
H you store the card for any reason, place it
in
an electrically and mechani-
cally safe container. The safest place for the PCA is
in
the computer card
cage.
If you must store the peA outside of the computer, use the original
packaging material or have the card packed by a commercial firm. You
must protect this PCA from static electricity and impact. Place the pack-
age containing the card upright (like a book on a shelf), to avoid crushing.
This
card draws its electrical requirements from the host computer. You
must verify that the computer can accommodate this additional power
load. Refer to Table 2-1 for the power requirements of the MUX.
Table 2-1. Power Requirements for the UP 27140A
Power
Voltage Mean level 2alevel
+5 6.90W
12.06W
+12 1.01W 1.90W
-12
1.62W I.SOW
Mean power required can be thought of as the nominal power require-
ment of the card. For the purposes of calculating probable power usage,
use the mean power level figures plus 20% as the maximum power require-
ment. Check the computer system manual for the total power supplied to
the backplane at each voltage level. After summing the power fIgUl'es
(in
watts) for the other cards
in
the computer, subtract this total from the
wattage available. This difference is the power available for use by the HP
27140A.
Power Available Power Supplied
for the MUX
=
by the Host - L
{
Power Loads Of}
all other cards
There must be more power available to the MUX than the requirement at
each voltage level.
Power Available Power Required
for the MUX
>
by the MUX