IBM Series 1 User Manual page 150

TELETYPEWRITER ADAPTER PHYSICAL CHARACTERISTICS
C
Phys!cal
Q~riEtio!!
c
o
The teletypewriter adapter is a standard IBM printed circuit
card with 2 signal planes. (For an illustration of the
card, see "I/O Channel Physical Component Description" in
Chapter 2.) Four connectors on the card plug into a
backpanel board that distributes the processor I/O channel
signal lines. There is a 16-pin (2x8) connector at the top
of the card for device inputs and outputs.
The cable that plugs into this connector should be made
using .24 AWG wire, and must use Berg* part number 75598-003
pins (or equivalent) and a Berg part number 65405-005
housing (or equivalent).
Figure 4-8 shows how to identify pins on the cable
connector. The following table is a list of the signals and
their pin assignments.
.fin
Signal
Pin Signal
A1 Isolated receive input+ B1 Non-isolated receive input-
A2
Current driver, current
B2
(Pol ar ization pin)
=mark
A3 Isolated receive input- S3 Current driver, current=
or non-isolated receive space
input+
A4 ElA received data in B4
TTL
received data in
A5 Frame ground
85
Signal ground
A6
ElA data terminal ready
B6
ElA transmitted data
A7
SSS closed=data mark B7
sss
open=data mark or
or -TTL data out
+TTL
data out
18
SSS/TTL write control
B8
SSS/TTL read control
*Berg Electronics, Division of E.I. duPont de Nemours~ Co.
Teletypewriter Adapter 4-27