User's Manual

SATELLINE-M3-TR1
User Guide, Version 3.0
13
3 SERIAL INTERFACE
The radio modem module is referred to as DCE (Data Communication Equipment) whereas the
PC or equivalent device is referred to as DTE (Data Terminal Equipment). The SATELLINE-M3-
TR1 includes a 15-pin ‘D’-type female connector, which contains all the connections required to
establish communication between the radio modem, acting as the DCE, and the PC, acting as
the DTE.
The radio modem contains two (2) serial ports, which are designated as Port 1 or Port 2 for
communication. Only one port at a time can be used for communication. The Interface must be
specified in the order. The user can set the Ports ON/OFF afterwards in the programming
mode. The Port 1 is always RS-232, but the Port 2 has 4 alternatives:
1. RS-232 / RS-422 (programmable)
2. LVTTL
3. TTL
3.1 D-15 connector
D-15 female connector adapter of the radio modem
Pinout of the D-15
PORT
PIN
DIR
SIGNAL
PORT 1
RS-232
6
OUT
CTS*
9
OUT
RD1
11
IN
TD1
13
IN
RTS*
PORT 2
TTL/LVTTL
2
OUT
CTS
3
OUT
RD
4
IN
TD
5
IN
RTS
PORT 2
RS-232
2
OUT
CD
3
OUT
RD2
4
IN
TD2
5
-
NC
PORT 2
RS-422
2
OUT
A'
3
OUT
B'
4
IN
A
5
IN
B
COMMON
1
IN
DTR
10
OUT
DSR
12
IN
MODE
7,8
-
GND
14,15
-
VB