User guide

SATELLINE-3AS NMS / NMS Epic / NMS 869 / VHF
User Guide, Version 1.0
81
14.2.2
RS-232 wiring - Port1 without handshaking
The simplest connection to PC serial port (RS-232) is depicted in the schematic below.
14.2.3
RS-232 wiring - Port1 and handshaking signals connected
A typical connection between the Port 1 of the radio modem and the PC serial port (RS-232)
using the handshaking signals is depicted in the schematic below.
9-PIN D-CONN. 25-PIN D-CONN. RADIO MODEM
14,15
7, 8
+Vb
GND
3 2
TD
11
+Vb
GND
2 3
RD
9
7 4
RTS
13
8 5
CTS
6
6
6
DSR
10
5 7
SGND
7
1 8
CD
2
4 20
DTR
1
TD
RD
RTS
CTS
DSR
SGND
CD
DTR
TD
RD
RTS
CTS
DSR
SGND
CD
DTR
Fuse
3AS: 630 mA slow
3AS Epic: 4 A slow
3
2
5
TD
RD
SGND
9-PIN D-CONN.
2
3
7
TD
RD
SGND
25-PIN D-CONN.
TD
RD
SGND
11
RADIO MODEM
9
7
1
14,15
7, 8
DTR
+Vb
GND
+Vb
GND
Fuse
3AS: 630 mA slow
3AS Epic: 4 A slow