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Switch Setting Description

Refer to 

Using the SCB-68 in Direct Feedthrough Mode

 for a detailed diagram.

* Not available on Connectors 1, 2, 3 of NI 6225/6255 or NI 6345/6355/6365/6375 devices.
† Not available on NI 61xx devices.

Table 2. MIO DAQ Device Switch Settings

Figure 4. MIO Device Modes Switch Settings

Temperature

Sensor

MIO DAQ Device Cable

SCB-68

S5

S4

Screw 

Terminal

67

66

3

2

1

34

8

68

67

66

3

2

1

34

8

68

S3

S1
S2

+5 V

AI 0

AI 8

Other

Pins

Refer to 
Your Device 
Documentation
for Device 
Signal
Information

Signal 

Conditioning

Connecting Signal Sources to Analog Inputs

For detailed information about connections from floating or ground-referenced

signal sources to analog inputs, refer to your device documentation.
Refer to the SCB-68 User Manual for Advanced Functions for more information

about using the temperature sensor, taking thermocouple measurements, and

adding bias resistors and signal conditioning components to the SCB-68.

Fuse and Power Information

Some DAQ devices p5 V power on pin 8 and pin 14. Pin 8 from the DAQ

device is protected by an 800 mA, 250 V, 5 × 20 mm fuse on the SCB-68, shown in

Figure 2. Shorting pin 8 to ground blows the fuse on the SCB-68. Pin 14 is not fuse-

© National Instruments

9

SCB-68 Getting Started

Summary of Contents for SCB-68

Page 1: ...SCB 68 Getting Started 2022 07 06...

Page 2: ...3 Getting Started with the SCB 68 4 Using the SCB 68 in Direct Feedthrough Mode 7 Using the SCB 68 with Multifunction I O Devices 7 Connecting Signal Sources to Analog Inputs 9 Fuse and Power Informat...

Page 3: ...use the SCB 68 with devices without analog input functionality you must change the default switch setting Refer to Using the SCB 68 in Direct Feedthrough Mode for more information Figure 1 SCB 68 Part...

Page 4: ...pin connectors and up to four SCB 68 accessories with supported products with four 68 pin connectors Getting Started with the SCB 68 The following cautions contain important safety information concer...

Page 5: ...RC20 B RC21 D R30 A R31 C RC9 E R14 F R15 G RC22 B RC23 D R32 A R33 C RC10 E R16 F R17 G RC24 B RC25 D R34 A R35 C RC11 E R18 F RC2 R2 RC3 R3 R19 G RC26 B RC27 D R36 A R37 C R38 R10 RC1 7 7 6 7 40 8 1...

Page 6: ...f 0 5 0 6 N m 4 43 5 31 lb in 6 Reinstall the strain relief if removed and tighten the strain relief screws 7 Close the top cover and reinsert the shielding screws to ensure proper shielding Caution D...

Page 7: ...the SCB 68 in Direct Feedthrough Mode NI 25xx NI 4309 NI 65xx NI 66xx NI 67xx and NI 78xx and products without analog input functionality must use direct feedthrough mode Move the switches to the dire...

Page 8: ...signal conditioning area of the accessory Refer to the following figure for a detailed diagram S5 S4 S3 S1 S2 MIO with single ended temperature sensor mode Move switches S1 S2 S3 S4 and S5 to the posi...

Page 9: ...itioning Connecting Signal Sources to Analog Inputs For detailed information about connections from floating or ground referenced signal sources to analog inputs refer to your device documentation Ref...

Page 10: ...Before replacing any fuses check for short circuits from power to ground Refer to the SCB 68 User Manual for Advanced Functions for information about filtering the power on the SCB 68 Where to Go fro...

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