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© Sealevel Systems, Inc.
RELIO R2 SYNC Manual | SL9255 10/2021
100-Pin Connector
Signal Name
DB25
Port 1
Port 2
Port 3
Port 4
N/C
1
51
26
76
GND
7
2
52
27
77
TXD-
2
3
53
28
78
TXD+
14
4
54
29
79
RTS-
4
5
55
30
80
RTS+
19
6
56
31
81
DTR-
20
7
57
32
82
DTR+
23
8
58
33
83
TSET-
24
9
59
34
84
TSET+
11
10
60
35
85
RXD-
3
11
61
36
86
RXD+
16
12
62
37
87
CTS-
5
13
63
38
88
CTS+
13
14
64
39
89
DSR-
6
15
65
40
90
DSR+
22
16
66
41
91
DCD-
8
17
67
42
92
DCD+
10
18
68
43
93
TXC-
15
19
69
44
94
TXC+
12
20
70
45
95
RXC-
17
21
71
46
96
RXC+
9
22
72
47
97
LL-
18
23
73
48
98
RL-
21
24
74
49
99
NC
25
75
50
100
SHIELD
Shell
Shell
Shell
Shell
Shell
