HP B132L+, Owner'S Manual, Page: 32 / 256

18
System Overview
System Unit Rear Panel Connectors
Serial I/O Connectors
You can attach a variety of pointing devices (such as a mouse or trackball),
or peripheral devices to the Serial Input/Output (SIO) ports on the B132L/
B132L+/
B160L/B180L workstation. Peripheral devices include printers,
plotters, modems, and scanners. Consult the documentation that accompa-
nies each pointing or peripheral device for specific information concerning
its use.
The SIO ports are programmable. You can set functions such as bit rate,
character length, parity, and stop bits. The SIO ports are used as an interface
for serial asynchronous devices to the CPU. The ports operate at up to a
460.8K baud rate.
Table 2 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.
SCSI Connectors
Use the narrow single-ended SCSI, and fast, wide differential SCSI, or ultra
wide, single-ended SCSI connectors to connect external SCSI devices such
as DDS-format tape drives, disk drives and CD-ROM drives. Consult the
Table 2 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