IBM Series 1 User Manual page 246

o
c
c
TNL: GN34-0368 to GA34-0033-O (February 4,1977)
Figure ij-10. Connections for current loop when the
teletypewriter adapter supplies current for the loop
Connections for current loop when teletypewriter adapter supplies current
Teletypewriter adapter
I/O device
ASR ASR
33
35
Current driver, current
A2
Transmit +
:;;: mark*
....... .......
Receive +
'-' ""
X7 T7
B5
Transmit -
Signal ground
0
-
'U
Receive
X6 T8
A3
Receive +
Nonisolated contact in +
o
Transmit + X3
T5
Bl
Receive -
Nonisolated contact in - 0
.......
'V
Transmit-
X4
T6
(or) B5
(B5 for 12 volts)
(Bl for 24 volts)
ASR 33 cable connections
~
*Inverted signal
from ASR 33 wiring diagram
(current:;;: space)
is available on B3.
ASR 35 cable connections
from ASR 35 schematic
Teletypewriter Adapter
ij-33