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© Sealevel Systems, Inc. 3420 Manual | SL9145 9/2022
DB-78 Connector Pin Assignments (DB-78 Female)
Port #
1
2
3
4
5
6
7
8
TD
36
12
27
3
75
51
66
42
RD
37
11
28
2
76
50
67
41
RTS
17
31
8
22
56
70
47
61
CTS
16
32
7
23
55
71
46
62
DTR
35
13
26
4
74
52
65
43
DSR
18
30
9
21
57
69
48
60
DCD
38
10
29
1
77
49
68
40
RI
15
33
6
24
54
72
45
63
GND
34
14
25
5
73
53
64
44
Figure 11 - DB-78 Connector Pin Assignments
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 insure you get the best performance from your adapter.
