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INSTALLATION-PERIPHERALS
SECTION 100-816-207
MARCH 1993
7-42
FIGURE 7-25
DK8 AND DK16 PDIU-DI TO IBM AT-TYPE COMPUTER, RS-232 CONNECTOR/CABLE CONNECTIONS
IBM PC AT modem style (serial)
DB25 to DB9, RS-232 cable.
Pin to pin connections are
confiqured as a straight cable,
not as a null modem cable
(50 ft max, 24AWG;
customer-supplied).
6789
23451
6789
23451
DB9
PIN #
1
2
3
4
5
6
7
8
9
NAME
DCD
RD
TD
DTR
SG
DSR
RTS
CTS
RI
DB25
PIN #
8
3
2
20
7
6
4
5
22
12345678
2022
12345678
2022
Rear view of asynchronous (serial)
communication interface connector (DB9) of
Toshiba laptop or IBM AT personal computer
Rear view of PDIU-DI DB25,
RS-232 female connector
TOSHIBA LAPTOP OR IBM AT-TYPE
PERSONAL COMPUTER (DTE)
PDIU-DI
(FUNCTIONS LIKE A DCE)
DB25
FEMALE
CONNECTOR
DB25
MALE
CONNECTOR
DB9
MALE
CONNECTOR
DB9
FEMALE
CONNECTOR
NOTES:
1. Some RS-232 EIA leads may be called by other names by some manufacturers.
2. The computer receives data on Pin 2 (RD) and sends data on Pin 3 (TD).
PIN DESIGNATIONS
COM PORT
PIN #
NAME
1
DCD
2
RD
3
TD
4
DTR
5
SG
6
DSR
7
RTS
8
CTS
9
RI
PDIU-DI
PIN #
NAME
1
FG
3
RD
4
RTS
5
CTS
6
DSR
7
SG
8
DCD
20
DTR
22
RI
PIN DESIGNATIONS
2
TD