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1.2 Description
Rack Mount Hole Pattern For Panel Model Reader
Dimensional tolerance
!
.
020
The Tally Model 424 Tape Readers, Figures 1,
3,
and 4, are self-contained bi-direc-
tional,
asynchronous
devices for reading any standard perforated
tape.
Tapes having five to
eight levels of information may be interchanged
and read without reader
adjustment.
The reading
rate
is
variable from 0 to 60
characters
per second
in
either direction of tape feed.
Tape wear
is exceptionally
low,
and standard paper tape may be
re
-read
hundreds
of
times.
Model types and associated
tape
handling facilities:
Model
424
c
424 CF
424 p
424 PF
424
PR
Console Model
"
Panel Model
"
Tape Handling Facility
No Tape
Handling
Fan Fold Tape Handling
No Tape Handling
Fan Fold Tape Handling
Reel Tape
Handling
The panel model
series
are mounted
on
an anodized aluminum
panel
1/
4"
x 8
-23/
32 x 19".
Refer
to
Section 1.1 for rack
mounting
dimensions.
Drive
power is supplied to the
capstan
from an integrally mounted
1/
30 HP motor
through a
bevel
gear and differential drive assembly.
The
use
of
special clutches in
the drive
assembly permits high speed resi)onse
for
bi-directional tape movement.
1.3
Input
Requirements
The
drive motor
(1/
30
HP)
requires
105-125
volt AC,
'so
cps, at 0.4 amperes.
To move
the tape, a 4.5
±
0.5 millisecond DC pulse (rise time less than 0.5 millisecond) of 48 or
24
±
10%
volts
(according to customer
specification) is
applied to
either
the forward or reverse escape-
ment assembly. One pulse must
be supplied
for each movement
of the
tape.
SEATTLE
Page
2
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