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INSTRUCTION
MANUAL
Model
750 Printer
SECTION
3
2.
Floating
decimal
lines
(m.
This
tnput
requires
a Logic
"0"
to
cause
a decimal
point
to
be printed
in the
specified
column.
This
input
has a sink
current
rating
of
I.6
milliamperes.
The
lines
are
coded
as follows:
(Pin
43)
IO-DP
= decimal
point
in column
IO
(Pin
47)
g-DP = decimal
point
in column
9
(Pin
45)
8-DP = decimal
point
in column
8
[;jn
z;i
In
7-DP = decimal
point
in column
i
6-DP = decimal
point
in column
4.
EXTERNAL PRINT
Command (Pin
42).
An input
transition
from
Logic
"0"
to
Logic
"I"
causes
a print
command
in
the
Model
750.
Sinking
current
for
Logic
"0"
is
4.2
milliamperes.
See Figure
7
for
timing
considerations.
3.
RED.
(Pin
44)
This
input
requires
a Logic
"0"
to
cause
the
Model
750 to
print
in "red".
This
feature
may be used
to
indicate
an overload
condition
on the
digital
measurin,g
instrument.
The RED input
is
level
sensitive
with
a minimum
duration
of
25
milliseconds
at
Logic
"0"
from
the
start
of
PRINT
cycle.
See Figure
8
for
timing
considerations.
Sinking
current
for
Logic
"0"
is
2.6
milliamperes.
TABLE
3-2.
I
'in
No.
Function
Pin
No.
I
2
z
2
is
9
IO
II
:;
I4
15
I6
1;
19
7.0
21
22
2';
25
P n Identification
l-l
2-l
1-2
2-2
l-4
2-4
l-8
2-8
3-l
4-l
3-2
4-2
2:;
3-8
4-8
2:;
2:;
2:;
2:;
7-I
"CONNECTOR A"
26
27
28
29
;:
2:
47
48
49
50
Function
=
8-l
7-2
8-2
7-4
8-4
7-8
8-8
9-l
IO-I
9-2
IO-2
9-4
IO-4
9-8
10-8
6-DP
EXTERNAL PRINT
7-DP
RED PRINT
8-DP
COMMON
3-DP
+5v
IO-DP
DATA HOLD
AA
3-3
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