Serial Communication Board with 2/4/8 RS-232/422/485 Ports
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PCIe-S114(i) Card (RS-232 Wiring):
Step 2: Short the
RxD
,
TxD
and
GND
pins of Port3 and
Port4.
PCIe-S144(i) Card (RS-485 Wiring):
Step 2: Short
Port3 Data+
to
Port4 Data+
,
Port3 Data-
to
Port4 Data-
,
and
Port3 GND
to
Port4 GND
.
Note:
For detailed information regarding wiring and pin assignments for the RS-
232/422/485, refer to Section 2.2 Wiring Notes for RS-232/422/485 and
Pin Assignment
Pin No.
Pin No.
Pin Assignment
TxD3
24
28
RxD4
RxD3
5
10
TxD4
Pin Assignment
Pin No.
Pin No.
Pin Assignment
Data3-
2
25
Data4-
Data3+
5
28
Data4+