User guide

SATELLINE-3AS NMS / NMS Epic / NMS 869 / VHF
User Guide, Version 1.0
80
14.2
Wiring
14.2.1
RS-232 wiring - both Ports 1&2 connected (DATA and NMS in use)
A typical connection between a radio modem and the PC serial ports (RS-232) is depicted in the
schematic below. One of the ports serves as the DATA port while the other is for NMS.
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
Fuse
3AS: 630 mA slow
3AS Epic: 4 A slow
+Vb
GND
3
2
5
2
3
7
TD2
TD2
RD2 RD2
SGND
SGND
4
3
NOTE!
When installing the cables of the serial interface, the operating voltage of all devices must
be off (POWER OFF condition).
Due to the greater current consumption of SATELLINE-3AS-NMS Epic operating voltage
must be connected to pins 14 AND 15, and ground to pins 7 AND 8. Correct fuse rating is
in this case 4 A (SLOW FUSE).