National Instruments 3.22E+04 用户手册
Chapter 2
Installation and Verification
© National Instruments Corporation
2-13
Table 2-4. 68-Pin Connector Pin Descriptions
68-Pin Connector Port
485
Signal
485
D-Sub 9
Connector
232
Signal
232
D-Sub 9
Connector
1
2
3
4
5
6
7
8
66
57
49
40
32
23
15
6
RXD–
5
DCD
1
68
59
51
42
34
25
17
8
CTS+
2
RXD
2
65
56
48
39
31
22
14
5
RTS+
3
TXD
3
64
55
47
38
30
21
13
4
RXD+
4
DTR
4
60
60
43
43
26
26
9
9
GND
1
GND
5
63
54
46
37
29
20
12
3
CTS–
6
DSR
6
62
53
45
36
28
19
11
2
RTS–
7
RTS
7
61
52
44
35
27
18
10
1
TXD+
8
CTS
8
67
58
50
41
33
24
16
7
TXD–
9
RI
9