3.4 REAR CARD CONFIGURATION
The rear interface card for the Model 1205RC is equipped with two
female UD-26 connectors: one for each DTE host port. This card has
one configuration jumper (JB4). Figure 5 (below) shows the location of
this jumper on the PC board.
SGND & FRGND (JB4)
In the connected position, this jumper links UD-26 pin 7 (Signal
Ground) and frame ground. In the open position, pin 1 is “lifted” from
frame ground.
JB4
Position 1&2 = SGND (UD-26 pin 7)
and FRGND Connected
Position 2&3 = SGND (UD-26 pin 7)
and FRGND Not Connected
Figure 5.
Rear card jumper location
JB4
(peg 1 toward
bottom of card,
peg 3 toward top
of card)
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4.0 INSTALLATION
This section describes the functions of the Model 1000R16 rack
chassis, tells how to install front and rear Model 1205RC cards into the
chassis, and provides diagrams for wiring the interface connections
correctly.
4.1 THE MODEL 1000R16 RACK CHASSIS
The Model 1000R16 Rack Chassis (Figure 6) has sixteen card
slots, plus its own power supply. Measuring only 3.5” high, the Model
1000R16 is designed to occupy only 2U in a 19” rack. Sturdy front
handles allow the Model 1000R16 to be extracted and transported con-
veniently.
4.1.1 THE RACK POWER SUPPLY
The power supply included in the Model 1000R16 rack uses the
same mid-plane architecture as the modem cards. The front card of
the power supply slides in from the front, and the rear card slides in
from the rear. They plug into one another in the middle of the rack.
The front card is then secured by thumb screws and the rear card by
conventional metal screws.
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Figure 6.
Model 1000R16 Rack Chassis with power supply
WARNING!
There are no user-serviceable parts in the
power supply section of the Model 1205RC. Voltage set-
ting changes and fuse replacement should only be per-
formed by qualified service personnel. Contact Patton
Electronics Technical support at (301)975-1007,
http://www.patton.com, or [email protected] for more
information.