Advantech Modem ADAM-4550 User Manual page 9

2 RX
3 TX
P C
7 RTS
8 CTS
4 DTR
6 DSR
5 GND
RS-232
Note: The RS-232 cable does not have to be
a null-modem cable. The ADAM-4550
will automatically detect and set itself
as a DCE.
ADAM-4550 User's Manual
2 RX/TX
RF
Module
3 TX/RX
7 CTS/RTS
8 TRS/CTS
4 DSR/DTR
DATA+
6 DTR/DSR
DATA-
RS-485
5 GND
ADAM-4550
Figure 1: Basic Connection Diagram
RF
DATA+
Module
DATA-
RS-485
RS-232 Connector
ADAM-4550
DATA+
DATA-
RS-485
ADAM-4011
9