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Testing the Unit
Attaching the
Cables
MUX-to-Junction
Panel Cable
24 Installation I Configuration
Once you have correctly installed the PCA you should test it to verify
proper operation of the MUX. While self test may be run with or without
the connecting cable attached to the board, you should initially run the
test before attaching it. Self test is executed automatically on power up.
The information you need to interpret the results of self test are found in
Chapte .. 4. Basically, if the LED on the card stays off after 45 seconds, the
card is working correctly.
The cables you
will
use are the MUX-to-Junction Panel cable and the RS-
232-C cables attached to your peripheral devices. Before attaching the
peripheral cables to the junction
pane~
check the manuals for any specific
cabling requirements.
The MUX-to-Junction cable is a 62-conductor cable with a proprietary
female connection which fits the card edge connector.
This
fitting is black
plastic with a metal ground striponthe back. The RFI grounding clip
(grommet) approxinlately two inches (5 em) from the connection
will
help
you identify it. Press
this
connection fumly onto the PCA mounted con-
nector with the cable exiting the connector on the bottom. Press the grom-
met fumly into the slot on the cable grounding bus below the card cage. If
yoUr computer is equipped with a retaining spring below the grounding
bus, ensure the grommet
is
fully seated in the spring. These steps are criti-
cal to reducing Radio Frequency Interference from an ungrounded cable.
Since
this
cable
is
one metre long Gust less than 40 inches), you should
mount the RS-232-C mounting bracket on the computer body, or very
near it. The 10-metre optional extension cable
will
allow you to place the
panel in a more convenient location, should this
be
necessary. If you have
the extension cable, remember to include its length in all card to device
" cable length totals. FigUres 2-1 through 2-3 show the various mounting
bracket options available. Once the cable end is outside the computer,
and the b,acket with the RS-232-CJunction Panel is mounted, the 62-pin
female connector at the free" end of the cable is pressed into the male con-
nector on the panel front. Using the mounting bolts provided, secure the
connector to the receptacle.
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