IBM Series 1 User Manual page 244

c
(
c
TNL: GN34-0368 to GA34-0033-0 (February 4, 1977)
Figure 4-9. Connections for
supplies current for the loop
current loop
Connections for current loop when user supplies current
Teletypewriter adapter
I/O device
Transmit loop
ASR
user's power supply
33
A7
Transmit +
+ .-
SSS closed
=
da ta mark
*
0
I
~ Receive- X6
B5
Transmit -
Signal ground
0
~ Receive + X7
Receive loop
user's power supply
Al
Receive +
+
1-
Isolated receive input + "
A ~ Transmit- X4
...,
I
A3
Receive -
Isolated receive input -
0
Transmit +
X3
*
Inverted signal
j
(closed
=
data space)
is available on B7.
ASR 33 cable connections
from ASR 33 wiring diagram
ASR 35 cable connections
from ASR 35 schematic
when the user
ASR
35
T8
T7
T6
T5
j
Teletypewriter
Adapter
4-31