Product Information

System Unit Rear Panel Connectors

Serial Input/Output Connectors

There are a variety of pointing devices (mouse or trackball) or peripheral devices that can attach to the Serial Input/Output (SIO) ports on the worksta- tion. Peripheral devices include printers, plotters, modems, and scanners. Consult the documentation that accompanies each peripheral device for spe- cific information concerning its use.

The SIO ports are programmable, allowing functions such as bit rate, character length, parity, and stop bits to be set. The SIO Ports are used as interfaces for serial asynchronous devices to the CPU. The ports operate at up to a 460.8 K baud rate.

Table 5 shows the SIO connector pin listings. The serial connectors are 9-pin D-sub connectors. Signal names are those specified in the EIA RS-232 stan- dard.

Table 5

Serial I/O Pins

 

 

 

 

 

 

 

 

Pin No.

 

Signal

Description

 

 

 

 

 

 

1

 

DCD

Data Carrier Detect

 

 

 

 

 

 

2

 

RXD

Receive Data

 

 

 

 

 

 

3

 

TXD

Transmit Data

 

 

 

 

 

 

4

 

DTR

Data Terminal Ready

 

 

 

 

 

 

5

 

GND

Ground

 

 

 

 

 

 

6

 

DSR

Data Set Ready

 

 

 

 

 

 

7

 

RTS

Request To Send

 

 

 

 

 

 

8

 

CTS

Clear To Send

 

 

 

 

 

 

9

 

RI

Ring Indicator

 

 

 

 

 

18