6.
Be sure to connect the ground FG
terminal to a class-3 ground (Ground
resistance should not exceed 100Ω).
Try to make the ground wire as short
as possible
7.
DB-9
Male Connector
PIN#
COM1
[RS-232]
COM2
[RS-422]
COM2
[RS-485]
1
NC
*1
TX+
DATA+
2
RX
NC
NC
3
TX
NC
NC
4
NC
RX+
NC
5
GND
GND
GND
6
NC
TX-
DATA-
7
NC
NC
NC
8
NC
NC
NC
9
NC
RX-
NC
*1 NC: No Connection
6
DC24V
+
-
FG
Power Connection
Pin-out of COM Ports
Use 22–12 AWG (0.5–1.5 mm ) wire
for the power connections.
2
