Texas Microsystems, Inc. 2003 - Cable Connections; Power Connections and Operating Voltagea; Keyboard Connections

2.2 Cable Connections
Before connecting the computer to a power source,
connect the CRT display and keyboard to the computer.
If the computer is to be rack mounted, refer to the
slide and rack mounting instructions before connecting
cables.
2.2.1 Power Connections and Operating Voltages
The 2001A rack mountable computer is capable of
powering two devices plugged into two external AC
receptacles on the rear. The combined current handling
capability of the two receptacles is approximately 6
amps. The total current drawn by a fully loaded unit
including the computer with a full set of circuit cards
and 6 amps on external devices is 10 amps.
The 2003A and 2004A
draw approximately
configured.
computers are self contained and
4 amps of current when fully
The 2000 Series Computers can be modified at the
factory to operate using 220-volt AC power or various
DC power voltages. The following considerations apply
with this modification: l)the fan is replaced to
operate properly with the selected input power
selected; 2)fuses are replaced; 3)the power supply is
Jumper selected for 220 volts or replaced with the
correct DC modules.
It should be noted that special considerations may be
necessary to select CRT monitors for non standard power
situations.
2.2.2 Keyboard Connections
Both the AT and XT keyboard five-pin connectors are
identical for all 2000 Series computers. The XT key-
board is specifically designed for the XT computer and
do •• not operate properly with an AT model. However, a
Jumper .'odification inside the AT keyboard allows it to
be downward compatible and to operate as an XT
keyboard. Identification part numbers are placed on
the underside of each keyboard.
On the 2001A computer, the keyboard connector is at the
lower left corner of the front panel~ For applications
which require it, a rear mounted keyboard connector is
available as an option.
On the 2003 computer, the keyboard connector is at the
lower right corner at the back of the computer.
Preliminary AT Users Manual
4
11/26/86