Operating instructions

5. Installation MICRO PANEL XV-102 3.5"
26 M002869-02, 07/2009
5.3.4 System Port (RS232)
The System Port is implemented as a standard RS232 interface. This interface is not electrically
isolated.
Tab. 7 Pin assignment of the RS232 interface
Wiring #
##
# Shielded cables must be used.
#
##
# The maximum baud rate depends on the cable length:
Tab. 8 Relationship of cable length / baud rate
Fig. 8 RS232 interface (9-pin, D-Sub, male, UNC)
Pin Signal Assignment
1 DCD Data Carrier Detected
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
12
3
4
5
6
7
89
Cable length Max. baud rate
30 m 9600 Bit/s
15 m 19200 Bit/s
10 m 38400 Bit/s
5 m 57600 Bit/s
2.5 m 115200 Bit/s
!
When preparing the cables, ensure that there is a low-resistance connection between
the cable shield and the connector casing (→ Chapter 5.3.2, "
""
" 23).