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1402 MODEL 2
DESCRIPTION
The 1402 Model 2 is a slightly revised 1402 Model
1.
The Model
2
is primarily used as an input-output
unit with the 1410 system.
Mechanically the only
differences are the addition of the punch emitter and
a clutch controlling the fourth read feed roll. Elec-
trically, the primary differences are the addition of
several power supplies and the addition of several
operational controls.
VARIA TIONS BETWEEN THE
MODEL
1
AND MODEL
2
Read Feed Roll Number
4
(Figure 1-1)
This feed roll is put under the control of the read
clutch.
In
the Modell it is continually running.
In
the Model
2
this feed roll is belt driven whereas in
the Modell it is gear driven.
In
the event of belt or
feed roll replacement, there is no special timing
condition.
Punch Emitter
This is a decoder unit which is located in the punch
'feed on the front end of the PLCB shaft. This punch
emitter is actually a gating device that provides a
gated pulse at each digit time during a punch opera-
tion. The information coming from the 1414 must be
"anded" with the gated pulse from the decoder. The
output from this "and" switch will condition the
punch magnets to become energized and therefore
punch the card.
Electrical Changes
There are two new power supplies in the 1402 Model
2.
A -12 v, 20 amp, and a +12 v, 4 amp supply are
added to the 1401 Modell to form the 1402 Model 2.
PUNCH
CHIPS
STACI<ER
READY
I
PUNCH
I
PUNCH
STOP
CHECK
PUNCH
FUSE
SID P
Figure 11-1. Operating Controls and Light Schematic
POWER
The - 20 v power supply has been revised to 6 amp
(the 1401 Modell had 15 amp).
The primary 208 or 230 volt "power up" sequence
relays are not located in the 1402 Model 2. The
voltage comes into the machine from another unit.
Instead of the master CB pulses (RLCB) going
directly to the power transistor as in the 1402 Model
1, the Model 2 pulses go to the 1414 unit then return
through "single shots" which condition the power
transistor.
Operating Controls and Lights (Figure
11-1)
The 1402 Model 2 has the same basic control and light
panel as the 1402 Modell, with the addition of the
following controls:
1.
Punch Start: Depressing this key causes two
cards to be fed into the punch feed, the computer
interlock to be established, and the punch ready light
to be turned on. If the punch has been stopped, de-
preSSing the punch start key will re-establish the
interlock, turn on the punch ready light and card
punching will resume under program control. After
the cards have been removed from the punch feed,
depressing the punch start key will cause the re-
maining three cards to be moved to the non-select
pocket.
The first card that enters the non-select
pocket will be unchecked.
2. Punch Ready: This light indicates that the
computer interlock has been established. The punch
is then under the control of the stored program.
3.
Punch Stop: Depressing this key causes the
punch to stop, the computer interlock to be removed,
and the punch ready light to be turned off.
4. Reader Ready: This light indicates that the
computer interlock has been established. The reader
is then under control of the stored program.
NOTE: Mechanical hardware differences are noted
in currep.t parts catalogs.
5.
End-of-File: The end-of-file key controls
circuits which create at last-card condition in the
CPU.
.... ALIDITy
READER
READY
READER
READER
CHECK
0'
STOP
FILE
TRANSPORT
READER
STOP
12-1
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