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July 2025
CB-68T
CB-68T, Screw Terminal, Isothermal Terminal Block
Actual item may vary if no part number is provided on quote request.
✔ 2 Year Warranty Included
✔ Free Domestic Ground Shipping
✔ NIST Calibration Available
Andrew Gar**** Verified Buyer
" Amazing to work with and had my order within 1 week after purchasing with all NI certs and data that were needed. "
March 2025
Said Sai**** Verified Buyer
" Competent contact for highly specialized components. The support team is very knowledgeable. Many thanks for the help and the fast shipping! "
January 2025
Bob C**** Verified Buyer
" Jason was able to get our emergency situation taken care of quickly and professionally. "
May 2025
Gregg Flecki**** Verified Buyer
" Great service and great products. This is my 2nd time using Apex Waves, truly impressed. "
January 2025
Carol Zimme**** Verified Buyer
" Very responsive and helpful, competitive pricing. Good source! "
July 2025
Andrew Gar**** Verified Buyer
" Amazing to work with and had my order within 1 week after purchasing with all NI certs and data that were needed. "
March 2025
Said Sai**** Verified Buyer
" Competent contact for highly specialized components. The support team is very knowledgeable. Many thanks for the help and the fast shipping! "
January 2025
Bob C**** Verified Buyer
" Jason was able to get our emergency situation taken care of quickly and professionally. "
May 2025
Gregg Flecki**** Verified Buyer
" Great service and great products. This is my 2nd time using Apex Waves, truly impressed. "
January 2025
National Instruments CB-68T Isothermal Terminal Block
The CB-68T is an Isothermal Terminal Block created by National Instruments. The CB-68T corresponds to the part number 777926-01. The NI CB-68T connects to the NI PCI-4351, NI PXI-4351, and NI USB-4350 I/O connector. The NI CB-68T is composed as a terminal block for the CA-1000 enclosure. This Isothermal Terminal Block is a shielded board with screw terminals and digital signal conditioning accessory connections.
The CB-68T is configured with isothermal features to minimize the gradients of temperature over the screw terminals. The CB-68T is featured for RTDs, thermocouples, thermistors, as well as voltage signals. The CB-68T can be used to improve the accuracy of a thermistor temperature sensor with the cold-junction quality for thermocouple measuring. The CB-68T can be used with a metal enclosure that can retain air currents outside of it to preserve the isothermal conditions.
The CB-68T is built with cable connectors for specific relays and digital signal functioning modules. This Isothermal Terminal Block should be used with the NB7 or NB8 cable as required for digital signal conditioning applications. If it’s not being used for digital signal conditioning, the cable assemblies required are the SH6868 shielded cable or R6868 ribbon cable. The SH6868 shielded cable is the recommended choice.
The NI CB-68T Isothermal Terminal Block delivers connections for every digital input/output line on the NI-435X products. The CB-68T delivers connections to all the analog input channels, except CH0 and CH1. CHO is preserved for the cold-junction sensor, while CH1 is saved for auto-zeroing circuitry.
| Model | CB-68T |
|---|---|
| Manufacturer | National Instruments |
| Part Number | 777926-01 |
| Type | Isothermal Terminal Block |
| Cold-junction TemperatureSensor Accuracy | 0.06 °C from 15 to 35 °C0.2 °C from 0 to 15 °C and 35 to 55 °C |
| Isothermal Accuracy | 0.1 °C |
| Compatible DIN Rails | DIN EN 50 022 and DIN EN 50 035 |
| Maximum Working Voltage | Each input should remain within ±42 V of ground. |
| Maximum Non-buffered Digital I/O | 8 mA source/8 mA sink |
| Maximum Buffered Digital Output | 15 mA source/64 mA sink |
| Dimensions | 6.6 × 6.5 × 1.25 in. |
| CB-68T Manual | User Manual and Maintenance Manual Available for Download |
| Price | Contact a sales representative for a quote. |
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