Installation Of M=Mory Power Equipment - HP 3000 Series Installation And Service Manual

I
Installation
2-8. Installation of Memory Power Equipment
The HP 3000 Series II and some of the earlier Series III crnnpute~
systems had their I/O card cages supplied only with I/O power,
because none of the I/O devices in existance at that time needed
memory backup power. Now, the INP requires both I/O power
and
memory power; so this capability must be added to the card cages
where INPs are to be installed in these systems. The necessary
equipment for adding memory power is included with the HP
300101\
INP. (See "Equipment Supplied" in Section
I . )
If your HP
3000
Computer System is a Series III, Model
32435A,
all necessary memory power equipment was built into it at the
factory when it was manufactured; so no memory power modification
is required in this model. Therefore, disregacd the memory
power installation procedure in this paragraph and proceed
directly to the installation of the communication cables
(paragraph
2-9).
If your computer system is an HP
3000
Series II or a Model
32421A
of the Series III, and if this is the first INP to be installed,
memory power must be added. In the case of multiple INP instal-
lations, the second, third, and fourth INPs (installed in the
sarne card cage) require no additional memory power equipment,
since they are supplied by the same source as the first INP.
However, the fifth INP installed in the same
HP
3000 comput(~r
must have an additional Memory Power Jumper
PCA
board
added to
another HP
30311
power supply. The sixth and seventh INP can use
the same neraory power source as the fifth INP. Therefore,
it
this is the installation of a second, thir-d, fourth, sixth, or
seventh ItJP, disregard the memory power installation procedure in
this paragraph and proceed directly to the installation of the
INP PCA boards (paragraph 2-8). If, however, you are installiny
the first or fifth INP, proceed as follows:
a. Determine that the power is still turned off (see step
paragraph 2-7) before proceeding with this part
ins tal lat ion.
b
of
of the
b. Open the reac cabinet doors, and locate the HP
30311A
Power
Supply to be used (see figure 2-4).
2-10
JUN 1980