Matrix-713 Hardware Guide
ARTILA
15
3.4.2 Pin assignment of RS-485/RS422
The pin assignment is shown as following table.
Port No.
P1
P2
P3
RS-485
1500Vrms Isolation protection
Device Mapping
ttyS1
ttyS2
ttyS3
Port No.
P4
RS-485/RS-422
1500Vrms Isolation protection
Device Mapping
ttyS4
3.4.3 Enable/Disable Termination resistor for RS-485
The Matrix-713 provides on-board 120Ohm termination resistor for each RS-485 port.
To enable the termination resistor, please remove the upper cover of the Matrix-713,
and the adjust the associated jumper to short position1 and position 2, shown below:
Port No.
P1
P2
P3
P4
Jumper No.
J3
J5
J6
J7
Termination Resistor Disabled (default)
Termination Resistor Enabled
J3 J5 J6 J7
P1
P2
P3
P4
D+
D-
D+
D-
D+
D-
D+
D-
1 2 3
1 2 3
