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Black Box Black Box Network Card IC183C
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RS-422/485 SERIAL INTERF
ACE PLUS, 4-POR
T
T
able A-2. DB37 Pin Assignments.
Port #
1
2
3
4
GND
33
14
24
5
TX-
35
12
26
3
RTS-
17
30
8
21
TX+
34
13
25
4
RX-
36
11
27
2
CTS-
16
31
7
22
RTS+
18
29
9
20
RX+
37
10
28
1
CTS+
15
32
6
23
1
...
...
25
26
27
28
29
...
...
32
