Transition Networks RS-232-TO-100BASE-FX User Manual
Transition Networks
SDSFE31xx-100 Industrial Device Server
24-Hour Technical Support: 1-800-260-1312 International: 00-1-952-941-7600
60
Copper DB-9 (RS-232) serial cable specifications
What is RS-232
(DB-9)?
(DB-9)?
RS-232 is a serial device control protocol that provides an interface between Data
Terminal Equipment (DTE) and Data Communications Equipment (DCE) that
employs serial binary data interchanges.
Terminal Equipment (DTE) and Data Communications Equipment (DCE) that
employs serial binary data interchanges.
DB-9 cable
specifications
specifications
Wire category:
3 to 5
Maximum data rate:
100Kb/s, 115.2Kb/s asynchronous (distance dependent)
Gauge:
24 to 22 AWG
Maximum cable distance:
50 ft (15.24 m)
DB-9 cable
pinouts
pinouts
Figure 59 shows the DB-9 (RS-232) serial cable pin assignments and pinout chart.
DB-9 Connector Pin Assignments
No
Code
Description
Signal
Direction
1
DCD
Data Carrier Detect
IN
2 RX
Receive
Data
IN
3 TX
Transmit
Data
OUT
4
DTR
Data Terminal Ready
OUT
5 GND Ground
—
6
DSR
Data Set Ready
IN
7
RTS
Request to Send
OUT
8
CTS
Clear to Send
IN
9 RI
Ring
Indicator
IN
Figure 59: DB-9 Connector and Cable Pin Assignment Chart
Note: The Device Server is configured as a DTE device. Use a straight-through
cable for connecting to a DCE device, or a crossover cable for connecting to
other DTE devices.
other DTE devices.