Copyright © 2021 ICP DAS Co., Ltd. All Rights Reserved.
E-mail: service@icpdas.com
Page: 5
P
P
i
i
n
n
A
A
s
s
s
s
i
i
g
g
n
n
m
m
e
e
n
n
t
t
s
s
a
a
n
n
d
d
R
R
S
S
-
-
4
4
2
2
2
2
/
/
4
4
8
8
5
5
C
C
a
a
b
b
l
l
e
e
W
W
i
i
r
r
i
i
n
n
g
g
f
f
o
o
r
r
P
P
C
C
I
I
e
e
-
-
S
S
1
1
4
4
2
2
(
(
i
i
)
)
PCIe-S142 Card
RS-422 Wiring
Device
Signal
PIN
PIN
Signal
TxD-
1
4
RXD-
TxD+
2
3
RxD+
RxD+
3
2
TxD+
RxD-
4
1
TxD-
GND
5
5
GND
RTS-
6
9
CTS-
RTS+
7
8
CTS+
CTS+
8
7
RTS+
CTS-
9
6
RTS-
PCIe-S142 Card
RS-485 Wiring
Device
Signal
PIN
PIN
Signal
DATA-
1
1
DATA-
DATA+
2
2
DATA+
Note: The RS-485 bus is a differential (balanced) signal, thus you cannot wire the
Data+ with Data- directly for a single port loop-back test. It will not work at all.
6
6
6
