14
8-PORT SERIAL HOST ADAPTER PCI
6. Connector Pin Assignments
6.1 DB25 (RS-232 DTE)
Signal
Name
Pin #
Mode
GND
Ground
7
—
TD
Transmit Data
2
Output
RTS
Request to Send
4
Output
DTR
Data Terminal Ready
20
Output
RD
Receive Data
3
Input
CTS
Clear to Send
5
Input
DSR
Data Set Ready
6
Input
DCD
Data Carrier Detect
8
Input
RI
Ring Indicator
22
Input
6.2 DB78 Connector Pin Assignments (IC142C)
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
