National Instruments SCB-68 Shielded I/O screw-terminal connector block

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National Instruments · NI DAQ

NI SCB-68

Name: NI SCB-68
Brand: National Instruments

The NI SCB-68 is a shielded I/O connector block with 68 screw terminals for connecting signals to compatible NI DAQ devices. It includes onboard cold-junction compensation and general-purpose breadboard areas for custom circuitry.

ManufacturerNational Instruments

ModelSCB-68

Part Number776844-01

Product TypeShielded I/O screw-terminal connector block

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Quote: SCB-68

Free Shippingfull policy linked

30-Day Warrantystandard coverage

30-Day Returnspolicy applies

Technical Supportmodel & compatibility help

Signal connections68 screw terminals

DAQ-side connector68-pin male SCSI type

Temperature measurement supportOnboard cold-junction compensation sensor

Custom circuitryTwo general-purpose breadboard areas

Electrical isolationNo electronic isolation

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Overview

Product overview

Key product information and technical features.

The SCB-68 provides accessible screw-terminal wiring between external signals and compatible NI data acquisition hardware. Used with an appropriate shielded cable, its enclosure helps reduce electromagnetic interference along the connection to the DAQ device.

Component pads and sockets allow users to implement filtering, current-input measurement, open-thermocouple detection, and voltage attenuation. These functions require the appropriate added components and configuration; the block is not an isolated signal-conditioning module.

Shielded signal termination when used with suitable shielded DAQ cabling.
Screw-terminal access for straightforward external signal wiring.
Integrated cold-junction compensation sensor for thermocouple measurement configurations.
Breadboard areas and component pads support user-added measurement circuitry.

Verified specifications

Technical data

Verified product specifications.

Number of screw terminals	68
DAQ-side connector	68-pin 0.050-inch SCSI D-type, male plug
Supported wire size	14–30 AWG
Screw-terminal torque	0.5–0.6 N·m
Dimensions (width × depth × height)	18.1 × 15.2 × 4.5 cm
Weight	828 g
Mounting	Desktop
Electronic isolation	Not provided

Condition & included items

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Condition

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Included

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Compatibility

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National Instruments

Manufacturer

Compatible NI DAQ device and cable

Measurement hardware and signal interconnect

SCB-68

Shielded screw-terminal signal breakout

System selection

Select the cable and terminal mapping for the exact DAQ device.

Do not connect hazardous voltages of 42 V peak or 60 VDC and above. Follow the SCB-68 User Guide and the connected device documentation.

Manuals & software

Technical resources

Manuals, software and technical resources for this model.

NI SCB-68 Product PageProduct Page · ni.com

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SCB-68 User GuideUser Guide · download.ni.com

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SCB-68 User Manual for Advanced FunctionsUser Manual · docs-be.ni.com

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SCB-68 and SCB-68A DAQ Multifunction I/O Accessory GuideAccessory Guide · ni.com

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SCB-68 Electrical Isolation and Shielding GuidanceTechnical resource

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Adding Lowpass Filtering to the SCB-68Technical resource

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Shipping, warranty & returns

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Warranty

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Returns

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FAQ

Product-specific questions

Product-specific answers based on available technical information.

Does the SCB-68 provide electrical isolation?

No. It is a shielded breakout terminal block, not an electronic isolation device. Shielding with an appropriate shielded cable does not provide galvanic isolation.

Can the SCB-68 support thermocouple measurements?

It includes an onboard cold-junction compensation sensor. Thermocouple measurements also require suitable DAQ hardware, wiring, and configuration.

Does the SCB-68 include built-in lowpass filtering?

No. Soldering pads allow users to add RC lowpass filter components. The added filter changes settling time and can reduce the practical scanning rate.