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Signals for Pin Assignments (Parallel):
Pin #
Signal
1
Strobe
2
Data 1
3
Data 2
4
Data 3
5
Data 4
6
Data 5
7
Data 6
8
Data 7
9
Data 8
10
Acknowledge
11
Busy
12
Paper end
13
Select
14+
Autofeed
15
Not used
16
0V
17
Chassis Gnd
18+
+5V*
19-30
0V
31
I–prime
32
Fault
33
0V
34-35
Not Used
36
Select-in
*50 mA maximum
+ Pins 14 and 18 are controlled by a jumper plug in the printer.
There is no signal on Pin 18 at the factory default setting of the
jumper plug.
C – 2 Appendix C: Interfacing
Return Pin #
Direction
19
To Printer
20
To Printer
21
To Printer
22
To Printer
23
To Printer
24
To Printer
25
To Printer
26
To Printer
27
To Printer
28
From Printer
29
From Printer
30
From Printer
No Return
From Printer
—
To Printer
—
—
No Return
Signal Ground
No Return
Ground
—
From Printer
—
Ground
—
To Printer
—
From Printer
—
Signal Ground
—
—
—
To Printer
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