Technical information

Direction refers to the direction of signal flow as viewed from the
printer.
Return denotes “twisted-pair return” and is to be connected at
signal-ground level. When wiring the interface, be sure to use a
twisted-pair cable for each signal and never fail to complete con-
nection on the return side. To prevent noise effectively, these
cables should be shielded and connected to the chassis of the
system unit and printer, respectively.
6 Data 5 InOut
7 Data 6 InOut
8 Data 7 InOut
9 Data 8 InOut
10 Acnlg- Out
11 Busy+ Out
12 Pe+ Out
13 Select Out
14 Autofeed In
15 Reserved -
16 Ground -
17 Ground -
18 Vcc Test -
19-30 Ground -
31 Iprime In
32 Fault- Out
33 Reserved -
34 Reserved -
35 Reserved -
36 Selectin In