Rs-232 Port A; Rs-232 Serial Connector; Rs-232-C Connector Pinouts - HP Model 745 - VME Workstation Owner's Manual

NOTE:
Figure 2-11
Table 2-8

RS-232 Port A

There are two PS/2 type serial interfaces - Port A and Port B. The serial ports
use a high-density connector. An HP A4301A conversion cable is required
to convert to a standard PC-compatible 9-pin male D-sub cable. Figure 2-11
shows the RS-232 serial connector. Also refer to Figure 2-1. Table 2-8
shows the RS-232-C connector pinouts.
The RS-232 Port B operates through different circuitry than Port A. Port B is
configured to operate when the system is built at the factory. However, if you
ever reload HP-UX, you will need to reconfigure the HP-UX kernel as
described in Chapter 9.

RS-232 Serial Connector

RS-232-C Connector Pinouts

Pin Number
1 DCD
2 RXD
3 TXD
4 DTR
5 GND
6 DSR
7 RTS
8 CTS
9 RI
Signal
Connecting Cables
Printer Connections
2-23