ICP DAS USA iDS-718i-D User Manual page 19

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COM1~4 Pin Assignment
Pin RS232 RS422
1 - TXD-
2 RXD TXD+
3 TXD RXD+
4 - RXD-
5 GND GND
6 - -
7 RTS -
8 CTS -
9 - -
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RS485 COM1
Data-
RS232
Data+
-
RS422
-
GND
-
RS485
-
-
Software
-
DIP Switch(COM1~4 Mode)
M1 M0
ON OFF
OFF ON
OFF OFF
ON ON
DIP Switch