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DGS Card Reader
Model 70/6331
(Cont'd)
Variable Data
Reader (Keyboard)
Model 70/6341
Options and Fcaflu-cs
DGS C01nponents
In the event that an error occurs during transmission, the Input
Station receives a negative acknowledgement. Since the card has been
held in the read position, the Input Station can then retransmit without
a second message setup by the operator. \Vith a successful retransmission,
the Input Station receives a positive acknowledgement and the document
is released. Should an error occur the second time, an alarm is displayed
at the Input Station. The operator must then press the Clear button to
have the card returned.
The Card Reader "throat" is located on the front of the Input Station
directly under the input requirement display panel.
Each Card Reader mechanism is a discrete operating unit.
It
can be
removed and replaced or initially installed at the user site by authorized
service personnel.
•
The DGS Variable Data Reader accepts 10 variable numeric digits as
inpu,t through a 10 x 10 matrix keyboard. Each column of keys is conspicu-
ously numbered 0 (the top most key) through 9. The keys have been
designed to accommodate the largest of hands. They are approximately one
inch square.
To enter variable data, such as quantities or weights, the operator
keys in the proper digits in the appropriate field. As each digit is pressed,
it is lighted on an otherwise dark panel. When the variable data input
requirement is satisfied the respective display indicator on the input
requirement display panel is turned off but the digits display remains
lighted. The Input Station/Variable Data Reader combination is condi-
tioned to hold the selected keys in the depressed (or read) position until
a positive acknowledgement is returned. At this time, all keys are reset
to the home position automatically.
In the event of a negative acknov.rledgement, since the keys are being
held in the depressed position, retransmission can take place without
resetting by the operator. Should a second error occur, an alarm condition
is displayed at the Input Station and the operator must press the Clear
pushbutton to reset the keys.
Only one key per column can be pressed. Upon recognition by the
operator that he has entered an incorrect digit in any column, he can
press the proper key resulting in the clearing of the erroneous one. Or the
operator may reset all keys by pressing the Clear button.
The Variable Data Recorder keyboard is conspicuously located on top
and right hand side of the Input Station.
It
is slightly inclined away from
the operator to coincide with natural arm movement.
The Yariable Data Readei' and keyboanl is a disci'ete opei'ating unit.
It can be removed and i'eplaced or initially installed at the
US(T
site by
authorized service personnel.
•
Expansion to 20 variable numeric digits and inhibit of automatic.: i'eset
(no cost) such that the same variable numeric data can be automatically
repeated through successive message transmissions.
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