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17
EXTERNAL CABLE INSTALLATION
The microdiagnosti.es can
be
run before
the external cables are installed.
The dummy EPO plug must
be
plugged into
position
J1
of the
EPO panel.
If
you
elect to run the micros, skip
to
section
18
and perform sections
18, 19,
and
20.
The EPO check should
be
performed
again after the external cables and
units are installed.
NOTE:
If 3210
Model
II is
installed,
the cables must be installed and power
on the 3210
II
for the microdiagnostics
to run properly.
Separate,
as
far as practical, all power
cords and signal cables.
Treat EPO cables
as
power cords.
They
should not parallel other power
cords,
signal cables, or conduit.
Signal cables should
be
placed
in
an
orderly fashion between interconnecting
system units.
Parallel signal cables
between units should pass thru
a
minimum
of metal structural elements and should
follow the same routing.
Cables must not
be laid out
with closed
loops or coils, but should
be
routed
in a
way to avoid this condition.
Avoid inter-twining
of
signal cables
in
parallel runs.
Each external cable
is
labeled
at
each
end.
A red label
is
used
on the "from"
end and
a
white label
is
used
on the
"to" end.
The "from" end
is
the cable
end away from the processor and the
"to"
end
is
the end toward the processor,
As
a
check on interface cable hookup
be sure that the light
gray/dark gray
connectors are always connected light
to dark and dark to light.
Mark
"BUS"
and "TAG" on all unlabled
interface cables before
installation.
'TO'
End
White
label
Dark
gray
connector
Plug
this
end toward
CPU
White
stripe
on
each
branch
indicates floor
line
rvJ
'FROM' End
Red
label
Light gray
connector
Plug
end
away from
CPU
Part
No.
Key
No.
Length
X
From
To
EC
No.
Tot
Ch
Ch
Part
No.
EC
No.
Key
No.
Length
X
Tot
From
Ch
To
Ch
Exceptions:
Chanel
Channel
to
Channel
Direct
Control
Multi-system
EPO
If
cable lengths were not checked
before the system arrived, check
them
now.
P/N 1993512
Previous EC 136398
Present EC 137171
Page
13
of
19
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