Db25 Direct Connection To Hp Vectra Pc's (9-Pin Connector); Db25 Direct Connection To Hp Printer With Hardware Handshake - HP A4500A - VMEbus Single Board Computer 744 Motherboard Manual

7 RS-232 connection

DB25 Direct connection to HP Vectra PC's (9-pin connector)

RS-232 DB25 Direct connection to HP printer with hardware handshake
Note
50
This cabling scheme is recommended for connecting to the following HP Vectra
interfaces:
HP Vectra with 9-pin connector:
HP Vectra interfaces:
25-pin male connector to DTC
-
1 - PGND
INPUT
2 - RD
OUTPUT
3 - TD
-
7 - SGND
OUTPUT
8 - RTS
22 - CTS
INPUT
This cabling scheme is recommended for connecting the following devices when a
hardware handshake is necessary:
HP Laserjet
HP Ruggedwriter
25-pin male connector to DTC
-
1 - PGND
INPUT
2 - RD
3 - TD OUTPUT
-
7 - SGND
OUTPUT
8 - RTS
22 - CTS
INPUT
HP Laser printers provide hardware flow control of host ports using DTR on pin 20.
The HP DTC family provide hardware flow control of devices using RTS/CTS on
pins 8 and 22.
386/XX,486/XX
24540B port A, 24541B port A
9-pin female connector to Vectra
HP648A/P, 86A/D, HP33440A/F, 47A/F, 49A, 59A,
41063A, C1200A, C1202A
Hp 2235
9-pin female connector to Vectra
3 - TD OUTPUT
INPUT
2 - RD
OUTPUT
7 - RTS
8 - CTS
INPUT
6 - DSR
INPUT
-
5 - SGND
INPUT
1 - DCD
OUTPUT
4 - DTR
INPUT
9 - RI
1 - PGND -
OUTPUT
2 - RD
INPUT
3 - TD
-
7 - SGND
OUTPUT
4 - RTS
20 - DTR
OUTPUT