SATELLINE-3AS and SATELLINE-3ASd
43
7.2
7.2
Interface Cable Connections
Interface Cable Connections
7.2.1
RS-232 Wiring
PORT COM1
PORT COM1
RS-232 interface basic connection:
RS-232 interface basic connection:
FUSE 630 mA slow
DTR
+Vb
GND
11
9
7
1
15
8
+Vb GND
RADIO MODEM
TD
RD
2
3
7
25-PIN D-CONNE CTOR
SGND
TD
RD
2
3
5
9-PIN D-CONNECTOR
SGND
TD
RD
SGND
The range of voltage is 9 - 30 V
DC
. Connect the power cables to a power supply with a power
rating of at least 1 A. The operating voltage of the positive pole of the D 15 connector is
connected to the pin 15 of the D connector and to the negative pole 8. The DTR line in position
"1" can be used as an ON/STAND-BY switch. In this case the logical state "1" (+5...+30 V)
corresponds to ON and "0" (0 V...-12 V) to STAND-BY.
Especially in portable applications the DTR line (pin 1) of the radio modem should be switched to
position "0" when possible to save power.
NOTE!
Whenever connecting RS-232 interface cables to equipment, the equipment MUST FIRST BE
TURNED OFF.
