Serial connection – Beijer Electronics MT 230 Nautic Monitor EN User Manual
Page 33
Interfaces and Functions
Beijer Electronics, MAEN956
33
The mode (RS232/RS485) as well as addressing of monitors is made via DIP
switches. See also section
Serial Connection
RS232 Mode
RS485 Mode
Note:
In RS485 mode the two interfaces can be used as In/Out, with one cable in the first
COM port and one cable in the second COM port.
In RS232 mode only one of the two interfaces can be used (no matter which) - do
not connect a cable to the unused port.
DIP switch 1
Mode
ON
RS485
OFF
RS232 (default)
Pin
Designation
Function
In/Out
1
+ 5 V
Out
2
TxD, TX, TD
Transmit Data
Out
3
RxD, RX, RD
Receive Data
In
5
GND
Ground
9
GND
Ground
Pin
Designation
Function
In/Out
1
+ 5 V
Out
2
Data +
Data
In/Out
3
Data -
Data
In/Out
5
GND
Ground
9
GND
Ground
5 4 3 2 1
5 4 3 2 1
9 8 7 6
9 8 7 6
COM A DSUB (male)
COM B DSUB (female)