HP c3700 HP Workstation c-class - Owner's Guide and Warranty Statement (A7814- - Page 33

RS-232C serial input/output connector - printer

Page 33 highlights

Table 1-3 system overview system unit rear panel connectors RS-232C serial input/output connector You can attach a variety of pointing devices (such as a mouse or trackball), or peripheral devices (such as printers, plotters, modems, and scanners) to the RS-232C Serial Input/Output (SIO) ports on this computer. Consult the documentation that accompanies each pointing or peripheral device for specific information concerning its use. The SIO ports are programmable. This means that you can set functions such as bit rate, character length, parity and stop bits using the System Administration Manager (SAM) or by selecting a system special device file with the functions already programmed. The SIO ports are used as an interface for serial asynchronous devices to the CPU. Table 1-3 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 standard. 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 Chapter 1 33

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Chapter 1
33
system overview
system unit rear panel connectors
RS-232C serial input/output connector
You can attach a variety of pointing devices (such as a mouse or
trackball), or peripheral devices (such as printers, plotters, modems, and
scanners)
to
the
RS-232C
Serial
Input/Output
(SIO)
ports
on
this
computer. Consult the documentation that accompanies each pointing or
peripheral device for specific information concerning its use.
The SIO ports are programmable. This means that you can set functions
such as bit rate, character length, parity and stop bits using the System
Administration Manager (SAM) or by selecting a system special device
file with the functions already programmed. The SIO ports are used as
an interface for serial asynchronous devices to the CPU.
Table 1-3 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 standard.
Table 1-3
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