Description
The Part Number 185355B-01, also known by its Alternate Part Number 777716-01, falls under the category of PXI Switches. This particular model, TBX-68S, is described as a TB Extension – Low Voltage General 24-CH with CJC, which highlights its capability and functionality.
It features a 68-pin screw, Isothermal Terminal Block as its terminal type, ensuring robust and reliable connections. This device is specifically compatible with NI-2501 and NI-2503 PXI switch cards, making it a versatile solution for a wide range of applications.
For installation, it is DIN-Rail mounted, adhering to DIN EN 50 022 and DIN EN 50 035 mounting standards, which ensures its compatibility with standard industrial mounting systems. Additionally, an NI TBX Rack-Mount Assembly serves as an alternative mounting option, providing flexibility in installation.
One of the special features of this model is its equipped cold-junction sensor, enhancing its utility for temperature-sensitive applications. Although it does not offer strain relief for signal wires, it compensates with Auto-Zeroing Circuitry, ensuring precision and accuracy in measurements.
The compatible cables for this device include the SH68-68S in 1 m, 2 m, and 5 m lengths, and the R6868 ribbon cable, offering flexibility in connectivity options.
While it has been announced as obsolete by National Instruments, it remains available for purchase and repairs through Apex Waves, providing continued support for users who rely on this specific model for their applications.
| Specification | Details |
|---|---|
| Part Number | 185355B-01 |
| Alternate Part Number | 777716-01 |
| Category | PXI Switches |
| Model | TBX-68S |
| Description | TB Extension – Low Voltage General 24-CH with CJC |
| Terminal Type | 68-pin screw, Isothermal Terminal Block |
| Compatible with | NI-2501 and NI-2503 PXI switch cards |
| Mounting | DIN-Rail mounted |
| Special Features | Equipped with a cold-junction sensor |
| Compatible Cables | SH68-68S (1 m, 2 m, 5 m lengths), R6868 ribbon cable |
| Mounting Standards | DIN EN 50 022, DIN EN 50 035 |
| Additional Mounting Option | NI TBX Rack-Mount Assembly |
| Strain Relief for Signal Wires | Not offered |
| Auto-Zeroing Circuitry | Yes |
| Obsolete Status | Announced by National Instruments, available for purchase and repairs by Apex Waves |
Question 1: What is the alternate part number for 185355B-01?
Answer 1: 777716-01
Question 2: Can the TBX-68S be mounted on a DIN-Rail?
Answer 2: Yes, adheres to DIN EN 50 022/035 standards.
Question 3: Is the TBX-68S compatible with NI-2501 and NI-2503 cards?
Answer 3: Yes, it’s designed for compatibility.
Question 4: Does the TBX-68S offer strain relief for signal wires?
Answer 4: No, it does not offer strain relief.
Question 5: Is the TBX-68S still available for purchase despite being obsolete?
Answer 5: Yes, available through Apex Waves.



