National Instruments 321906B-01 用户手册

Chapter 1

Routing Signals with Your NI 2501/2503

NI 2501/2503 User Manual

1-6

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National Instruments Corporation

Figure 1-2. Front Connector Pinout Assignments for One-Wire Mode

CH47

CH46

CH45

CH44

CH43

CH42

GND

+5 V

COM3– (CH42–CH48)

1

COM2– (CH36–CH41)

1

CH41

CH40

CH39

CH38

CH37

CH36

AB1–

1

AB0–

CH35

CH34

CH33

1_WIRE_LO_REF

CH32

CH31

CH30

COM1– (CH30–CH35)

1

COM0–

CH29

CH28

CH27

CH26

CH25

CH24

CJS–

1

1

35

2

36

3

37

4

38

5

39

6

40

7

41

8

42

9

43

10 44

11 45

12 46

13 47

14 48

15 49

16 50

17 51

18 52

19 53

20 54

21 55

22 56

23 57

24 58

25 59

26 60

27 61

28 62

29 63

30 64

31 65

32 66

33 67

34 68

CH23

CH22

CH21

CH20

CH19

CH18

EXT_TRIG_IN

SCAN_ADV

COM3+ (CH18–CH23)

1

COM2+ (CH12–CH17)

1

CH17

CH16

CH15

CH14

CH13

CH12

AB1+

1

AB0+

CH11

CH10

CH9

GND

CH8

CH7

CH6

COM1+ (CH6–CH11)

1

COM0+

CH5

CH4

CH3

CH2

CH1

CH0

CJS+

1

1

not used in one-wire mode