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National Instruments SCB-68A Shielded screw-terminal I/O connector block
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National Instruments · NI DAQ and supported R Series devices

NI SCB-68A

The NI SCB-68A provides shielded screw-terminal connections for compatible NI data acquisition devices. It is a breakout accessory, not an acquisition device or an electronic isolation module.

ManufacturerNational Instruments
ModelSCB-68A
Part Number782536-01
Product TypeShielded screw-terminal I/O connector block
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Free Shippingfull policy linked
30-Day Warrantystandard coverage
30-Day Returnspolicy applies
Technical Supportmodel & compatibility help
Manufacturer part number782536-01
Termination68 screw terminals
ShieldingEMI shielding when used with a shielded cable
Electrical isolationNot provided
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Overview

Product overview

Key product information and technical features.

The SCB-68A belongs to NI's shielded connector-block family, providing screw-terminal access inside a shielded enclosure. Device and cable selection must follow NI's accessory compatibility guidance rather than connector pin count alone.

The board supports user-added circuitry but does not supply built-in signal conditioning. Its shielding does not electrically isolate field wiring from the connected DAQ device.

  • Shielded enclosure with screw-terminal signal connections.
  • Breadboard area and through-hole pads for custom circuitry.
  • Onboard temperature sensor for thermocouple cold-junction compensation with appropriate DAQ configuration.
  • DIN rail mounting supported with a separate mounting kit.
Verified specifications

Technical data

Verified product specifications.

I/O connectorOne 68-pin male SCSI connector
Screw terminals68; all I/O signals accessible
Wire gauge14–30 AWG
Terminal tightening torque0.5–0.6 N·m
Dimensions including feet14.7 × 14.7 × 3.0 cm
Weight644 g
Temperature sensor accuracy±1.0 over 0 to 70 °C °C
Maximum input voltage30 Vrms / 42 Vpk / 60 VDC; connected device limits also apply
Condition & included items

What the actual unit includes

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Condition

Confirmed per unit.

Included

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Revision

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Compatibility

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National Instruments

Manufacturer

NI DAQ accessories

Device-specific cabling and signal termination

SCB-68A

Shielded screw-terminal breakout

R Series configuration

Supported R Series connections require the correct cable and device-specific terminal pinout.

Verify the exact DAQ model, connector, cable, pinout and switch configuration before wiring.
Manuals & software

Technical resources

Manuals, software and technical resources for this model.

NI SCB-68A User Manual and SpecificationsManual · docs-be.ni.com
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NI 78xx R Series Cable and Accessory CompatibilityCompatibility Guide · ni.com
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SCB-68A Analog Input Voltage LimitationTechnical resource
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SCB-68 and SCB-68A Isolation and ShieldingTechnical resource
Open →
Shipping, warranty & returns

Commercial terms

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Shipping
Free Shipping. Full policy terms apply.
Warranty
30-Day Warranty. Standard coverage applies.
Returns
30-Day Returns. Return policy applies.
Price / Availability
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Lifecycle services

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FAQ

Product-specific questions

Product-specific answers based on available technical information.

Does the SCB-68A provide electrical isolation?

No. NI identifies it as a breakout terminal block without electronic isolation. Its enclosure provides EMI shielding when used with an appropriate shielded cable.

Does the SCB-68A include built-in signal conditioning?

No built-in signal conditioning is provided. Users can add their own circuitry to the board.

Which mode is required with the PXIe-6355?

NI specifies Direct Feedthrough Mode for the SCB-68A when used with the PXIe-6355.

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