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RS-422/485 (68 Pin)
Please terminate any control signals that are not going to be used. The most common way to do
this is connect RTS to CTS and RI. Also, connect DCD to DTR and DSR. Terminating these pins, if
not used, will help ensure you get the best performance from your adapter.
The RTS output is only available in RS-422 mode. The RTS output is tri-stated in RS-485 mode and
therefore unusable. The CTS input is available in all modes.
© Sealevel Systems, Inc.
7802e Manual | SL9249 11/2022
Port #
1
2
3
TX-
1
9
19
RX-
7
15
25
RTS-
5
13
23
CTS-
8
16
26
TX+
4
12
22
RTS+
6
14
24
RX+
3
11
21
CTS+
2
10
20
GND
17
17
18
4
5
6
7
8
27
35
43
53
61
33
41
49
59
67
31
39
47
57
65
34
42
50
60
68
30
38
46
56
64
32
40
48
58
66
29
37
45
55
63
28
36
44
54
62
18
51
51
52
52
13
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