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INSTALLATION-PERIPHERALS
SECTION 200-096-208
FEBRUARY1991
IBM XT PERSONAL COMPUTER
OR ASCII TERMINAL
(FUNCTIONS LIKE A DTE)
DB25 PIN DESIGNATIONS
PDIU-DI
PIN# 1 2 3 4 5 6 7 8 20 22
NAME FG TD RD FITS CTS DSR SG DCD DTR RI
Rear view of personal computer
PDIU-DI
PIN# 1
2 3 4 5 6 7 8 20 22
NAME FG TD RD RTS CTS DSR SG DCD DTR RI
PDIU-DI
(FUNCTIONS LIKE A DCE)
DB25 PIN DESIGNATIONS
RS-232 CABLE
.
DB25
DB25
PIN# NAME PIN #
8
DCD 8
3
RD 3
2 TD 2
20
DTR 20
7 SG 7
6 DSR 6
4
RTS 4
5
CTS 5
22
RI 22
1 FG 1
IBM PC AT modem style (serial)
DB25 to DB2.5 (M/F) E-232
cable (50 ft max, 24 AWG,
customer supplied).
NOTE:
The PC/ASCII terminal receives data on pin 3 (RD) and transmits data on pin 2 (TO).
I
FIGURE 8-30-POIU-DITOIBMXTTYPE COMPUTER, RS-232 CONNECTOR/CABLE CONNECTIONS
8-50