SATELLINE-2ASxE
User Guide, Version 2.0
39
11.1 RS-232 Interface
The radio modem is connected to terminal via RS-232 interface. A typical connection where all
handshaking lines are used should be made according to the figure below.
TD
RD
RTS
CTS
SGND
CD
DTR
+Vb
GND
11
9
13
6
7
2
1
15
8
+ V b G N D
RADIO MODEM
FUSE 630 mA slow
TD
RD
RTS
CTS
CD
2
3
4
5
7
8
25-PIN D-CONNECTOR
DTR
20
DSR
6
SGND
TD
RD
RTS
CTS
CD
2
3
5
1
7
8
9-PIN D-CONNECTOR
DTR
4
DSR
6
SGND
In some systems the radio modem is connected to another Data Transmission Equipment (modem).
The signal lines should in this case be connected according to the picture below.
TD
RD
RTS
CTS
CD
2
3
4
5
7
8
TD
RD
RTS
CTS
SGND
CD
DTR
+Vb
GND
11
9
13
6
7
2
1
15
8
+Vb GND
RADIO MODEM
FUSE 630 mA slow
DTR
20
DSR
6
SGND
DSR
10
TD
RD
RTS
CTS
CD
2
3
5
1
7
8
9-PIN D-CONNECTOR
DTR
4
DSR
6
SGND
25-PIN D-CONNECTOR
