National Instruments SCB-68 NI 671, /673

Chapter B Quick Reference Labels

SCB-68 Shielded Connector Block User Manual B-4 ni.com

Figure B-3. NI671X/673X Devices

DAC1 OUT

DAC0 OUT

NCC

EXTREF

AOGND

AIGND

DIO5

51

S4

* 68 GENERIC TERMINALS

ACCESSORY POWER OFF)

(TEMP. SENSOR AND

S5

23

57 22

56

S3

S2

S1

58

24

25

59

27

60

26

61

28

21

55

54

20

DIO0

52

53

19

DGND

DIO4

18 DGND

S4

FACTORY DEFAULT SETTING

* ACCESSORY POWER ON

* TEMP. SENSOR DISABLED

S5

DGND

13

66

AOGND

DAC6OUT

AOGND

NC

DAC5OUT

AOGND

DAC4OUT

AOGND

DAC3OUT

AOGND

DAC2OUT

AOGND

NC

AOGND

NC

DAC7OUT

62

29

30

63

64

31

32

65

50

17 DIO1

DGND

49

16

DIO2

DIO6

15

48 DIO7

DGND

14

47 DIO3

+5V

S1

S3

S2

67

33

34

68

DGND

12

46

EXTSTROBE*

PFI0

45

11

PFI4/GPCTR1_GATE

GPCTR1_OUT

+5V, FUSED

PFI2

PFI3/GPCTR1_SOURCE

PFI1

44

10

DGND

43

9

41

42

8

DGND

40

7

2GPCTR0_OUT

PFI9/GPCTR0_GATE

PFI6/WFTRIG

PFI7

PFI5/UPDATE*

PFI8/GPCTR0_SOURCE

DGND

6

39

5

38

DGND

4

37

DGND

3

36

FREQ_OUT

DGND

1

35

SCB-68 Quick Reference Label

NI 671

X

/673

X

DEVICES

SIGNALPIN #PIN # SIGNAL

PIN # SIGNAL

DGND

NATIONAL

INSTRUMENTS

Contents

Main Page Important Information Warranty Copyright Trademarks Patents Compliance FFCC/Canada Radio Frequency Interference Compliance Determining FCC Class FCC/DOC Warnings Class A Compliance to EU Directives Contents Chapter 4 Using Thermocouples Chapter 5 Adding Components for Special Functions Page About This Manual Conventions Page Introduction What You Need to Get Started Quick Reference Label Page Table 1-1. Device-Specific Hardware Configuration (Continued) Installing Cables Using 68-Pin Cables Using 100-Pin Cables Page Figure 1-4. SCB-68 E Series I/O Connector Pinout (Full) Figure 1-5. SCB-68 E Series I/O Connector Pinout (Extended AI) Figure 1-6. SCB-68 E Series I/O Connector Pinout (Extended Digital) Configuring the SCB-68 Safety Information Page Page Parts Locator and Wiring Guide Figure 2-1. SCB-68 Printed Circuit Diagram SCB-68 Switch Configuration Page Page Connecting Signals Connecting Analog Input Signals Input Modes Figure 3-1. Summary of AI Connections Using Bias Resistors Nonreferenced or Floating Signal Sources Ground-Referenced Signal Sources Differential Connection Considerations (DIFF Input Mode) Differential Connections for Ground-Referenced Signal Sources i Figure 3-2. Differential Input Connections for Ground-Referenced Signals Differential Connections for Nonreferenced or Floating Signal Sources Using Bias Resistors Single-Ended Connection Considerations Single-Ended Connections for Floating Signal Sources (RSE Input Mode) Single-Ended Connections for Grounded Signal Sources (NRSE Input Mode) Connecting Analog Output Signals Connecting Digital Signals Connecting Timing Signals Noise Considerations Page Using Thermocouples Switch Settings and Temperature Sensor Configuration Special Considerations Adding Components for Special Functions Channel Pad Configurations Conditioning Analog Input Channels Conditioning Analog Output Channels Figure 5-3. Analog Output Channel Configuration Diagram for DAC0OUT Conditioning PFI0/TRIG1 Figure 5-5. Digital Input Channel Configuration Diagram for PFI0/TRIG1 Figure 5-4. Digital Input Channel Configuration Diagram Accuracy and Resolution Considerations Open Thermocouple Detection Differential Open Thermocouple Detection Single-Ended Open Thermocouple Detection Sources of Error Lowpass Filtering Page Page One-Pole Lowpass RC Filter Selecting Components Single-Ended Lowpass Filter Differential Lowpass Filter Analog Output and Digital Input Lowpass Filtering Lowpass Filtering Applications Noise Filtering Antialiasing Filtering Special Consideration for Analog Input Channels Special Consideration for Analog Output Signals Special Consideration for Digital Trigger Input Signals Measuring a 4 to 20 mA Current Selecting a Resistor Attenuating Voltage Page Selecting Components Accuracy Considerations Single-Ended Input Attenuators Differential Input Attenuators Analog Output and Digital Input Attenuators Special Considerations for Analog Input Special Considerations for Analog Output Special Considerations for Digital Inputs A Specifications Analog Input Power Requirement Fuse Physical Maximum Working Voltage Environmental Safety Electromagnetic Compatibility CE Compliance Page Figure B-1. ESeries Device s SCB-68 Shielded Connector Block User Manual B-2 ni.com E SERIES DEVICES NI 670 Figure B-2. NI670X Devices National Instruments Corporation B-3 SCB-68 Shielded Connector Block User Manual DEVICES NI 671 /673 Figure B-3. NI671X/673X Devices SCB-68 Shielded Connector Block User Manual B-4 ni.com Figure B-4. S Series Devices S SERIES DEVICES NI 660 Figure B-5. NI660X Devices X S5 X NI 653 Figure B-6. NI653X Devices National Instruments Corporation B-7 SCB-68 Shielded Connector Block User Manual DEVICES Figure B-7. NI7811R/7831R Devices NI 7811R/7831R DEVICES C Fuse and Power D SCB-68 Circuit Diagrams Figure D-1. +5 V Power Supply This appendix contains illustrations of circuit diagrams for the SCB-68. Figure D-2. Cold-Junction Compensation Circuitry Figure D-3. Digital Trigger Circuitry Figure D-4. Analog Output Circuitry E Soldering and Desoldering on the SCB-68 Page F Technical Support and Professional Services Page Glossary Numbers/Symbols A C D Page I L M N O P R S T U V W Index Numbers A B C Page D E F G I L M N O P Q R S T V