Matrix-750 Hardware Guide
ARTILA
12
3.2 Serial Port
The Matrix-750 has one RS-485/RS-232 ports, Default setting is RS-485.
RS-485 is designed without isolation that automatically direction controlled via
software
The pin assignment is shown as following table.
Port No.
Pin1
Pin2
Pin3
RS-485 Signal
GND
D+
D-
RS-232 Signal
GND
TX
RX
Enable/Disable Termination resistor for RS-485 (JP1)
The Matrix-750 provides on-board 120Ohm termination resistor for each RS-485 port.
To enable the termination resistor, please remove the upper cover of the Matrix-750,
and the adjust the associated jumper to short as below:
Termination Resistor Disabled (default)
Termination Resistor Enabled
Set Serial Port to RS232 port (JP3)
The Serial Port on Matrix-750, default is RS-485 at JP3 (setting Pin 3 and Pin4)
To Enable RS-232 port, setting JP3 at Pin 1 and Pin 2
1 2 3
1 2 3
P
in
1
P
in
2
P
in
3
JP3
JP1
3
4
1
2
3
2
1
