From Saturday, Nov 23rd 7:00 PM CST - Sunday, Nov 24th 7:45 AM CST, ni.com will undergo system upgrades that may result in temporary service interruption.
We appreciate your patience as we improve our online experience.
68-Pin VHDCI Cables: Digital Instrument Cable Guide
Overview
This guide addresses many common questions for the most popular NI Digital 68-pin VHDCI cables: the SHC68-C68-D4 Cable and C68-C68-D4 Cable. NI 68-pin VHDCI cables are primarily used on many of the NI Digital hardware family models, such as NI 653X series, the NI 654X series, the 655X series and the 657x series. The cables feature 0.8 mm 68-pin VHDCI connections, with the option for an unshielded cable, enhanced performance noise reducing cable assemblies. Whether you are purchasing new, using a replacement cable, or creating a custom fixture, this guide provides pinouts, wire mappings, color codes, wire gauge, connector part info, and grounding or shielding information as a short summary.
Contents
- Using the Digital Instrument Cable and Accessory Guides
- Understanding NI 68-pin VHDCI Cable Terminology
- Differences and Similarities between 68-pin VHDCI Digital Cables
- Quick Specifications and Documentation
- Compatible Devices, Modules, and Cabling for Digital VHDCI 68-pin Cables
- Additional Resources
Using the Digital Instrument Cable and Accessory Guides
This guide is intended to cover the most popular 68-pin VHDCI cables which are designed for use with NI Digital Instruments including Digital Waveform Instruments (previous High-Speed Digital I/O), Digital Pattern Instruments and High-Speed Serial devices. It does not cover similar cables for other NI product lines, even if they share the same connectors.
- To find more information about other NI Digital Instrument cables and general information that applies to all Digital Instrument cables, visit Digital Instrument Cable Guide Main Page.
- To determine compatibility of your 68-pin cable with your NI Digital device or module, your NI Digital connector black or terminal block, visit Digital Instrument Cable and Accessory Compatibility or review the general compatibility information below.
- To learn more about NI Digital Instrument connector and terminal block accessories to which you can connect your cable, review Digital Instrument Accessory Guide.
- To create your own cable or test fixture, or to repair an existing NI Digital Instrument cable or accessory, visit NI Digital Instrument Device Custom Cables, Replacement Connectors, and Screws.
Understanding NI 68-pin VHDCI Cable Terminology
This section provides a brief summary of acronyms and terminology used on these 68-pin VHDCI cables. For more in depth information about other connectors as well as the terminology listed on this page, visit the main Digital Instrument cables guide.
Naming Summary for this Guide
- SH - Shielded cables. Shielding can include individually shielded pairs and/or shielding for the entire cable assembly.
- C - Cables with a "compact" 0.8 mm VHDCI connector.
- -D - Wire pairings designed specifically for digital applications.
Shielding and Twisted Pairs
Cable shielding utilizes a thin conductive metallic layer to protect against electromagnetic interference. Twisted pairs provide another level of noise reduction by twisting pairs of differential signals. Click here to learn more about cable shielding and twisted pairs.
Differences and Similarities between 68-pin VHDCI Digital Cables
NI offers a wide range of cables to work with different Digital products, serving a variety of needs. While the wire pinout may be the same on most cables, each offers different connectors, shielding, and twisted pairs.
- Check out other popular Digital cables.
- Review which cables are compatible with your device, module or accessory.
| Model | Device Connector | Accessory Connector | Shielded? | Application Notes |
|---|---|---|---|---|
| SHC68-C68-D4 Cable | VHDCI | VHDCI | Yes | High performance noise reduction |
| C68-C68-D4 Cable | VHDCI | VHDCI | No | Cost effective, no shielding |
| SHC68-H1X38 | VHDCI | - | Yes | Shielded flying lead cable for connection custom test fixtures |
Quick Specifications and Documentation
This section contains a summary of information frequently sought when installing or customizing 68-pin VHDCI Digital Instrument cables. More detailed information can be found in the linked additional resources below. Dimensional drawings can be downloaded for free and are available in 2D and 3D formats; they contain size measurements, part numbers, wire mappings and other helpful information. They are available in several popular formats, such as PDF, AutoCAD (.dxf, and .igs (IGES)), STEP (.stp), and .prt (Pro/E).
| Device or Module Side Cable Pinout |
Accessory Side Cable Pinout |
| Wire Gauge |
Signal Wires: 32 AWG |
| See Dimensional Drawing for more information |
| Bend Radius1 |
Cable Outer Diameter: 0.38 inches |
Bend Radius: 2.7 inches |
| 1For the bend radius in areas contained in polyester sleeving see the dimensional drawings. |
| Detailed Information | |
| Shielding: Individually shielded mini coaxial, shielding on full cable assembly | |
| Wire Configuration: Mini-Coaxial cables | |
| Connector Part Number and Jackscrews: See Dimensional Drawing and Custom Connectors Guide | |
Part Numbers: | |
| Device or Module Side Cable Pinout |
| Accessory Side Cable Pinout |
| Wire Gauge |
Signal Wires: 32 AWG |
| See Dimensional Drawing for more information |
| Bend Radius1 |
Cable Outer Diameter: 0.38 inches |
Bend Radius: 2.7 inches |
| 1For the bend radius in areas contained in polyester sleeving see the dimensional drawings. |
| Resources |
| Detailed Information | |
| Shielding: Individually shielded mini coaxial | |
| Wire Configuration: Mini-Coaxial cables | |
| Connector Part Number and Jackscrews: See Dimensional Drawing and Custom Connectors Guide | |
| Part Number: 195949-01 | |
| Device or Module Side Cable Pinout |
| Accessory Side Connector Image |
Pinout can be found on the individual Lead Pairs |
| Wire Gauge |
Signal Wires: |
32 AWG |
| Bend Radius |
Cable Outer Diameter: 0.19 inches |
Bend Radius: 1.32 inches |
| Resources |
| Detailed Information | |
| Wire mapping or pinout with wire colors: Printed on Lead Pairs | |
| Shielding: Individually shielded micro coaxial, shielding on full cable assembly | |
| Wire Configuration: Micro-Coaxial cables | |
| Connector Part Number and Jackscrews: See Custom Connectors Guide | |
| Part Number: 192681-1R5 | |
Compatible Devices, Modules, and Cabling for Digital VHDCI 68-pin Cables
This section is a summary of the most common use cases. Refer to the compatibility guide for complete coverage for your device or module with your cable and connector block or terminal block.
| Cable | Product | Device or Module |
|---|---|---|
SHC68-C68-D4 Cable and C68-C68-D4 Cable | Digital I/O Adapter Modules for FlexRIO | 6581, 6581B, 6583 |
| Digital Pattern Instrument | 6570, 6571 | |
| Digital Waveform Instruments (previously High-Speed Digital I/O) | 6535, 6536, 6537, 6535B, 6536B, 6537B, 6541, 6542 6544, 6545,6547, 6548, 6551, 6552, 6555, 6556 | |
| Digitizer Adapter Modules for FlexRIO | 5751, 5751B, 5752, 5752B | |
| High-Speed Serial Instruments | 6591 | |
| Signal Generator Adapter Modules for FlexRIO | 5741, 5742 | |
| SHC68-H1X38 | Any device recommended for SHC68-C68-D4 Cable and needing custom connection solutions. | |
Additional Resources
- Learn about terminology, specifications and other common questions for other Digital Cables.
- Learn about specifications, model differences and other common questions for other Digital accessories.
- Learn about the compatibility of NI Digital devices and modules with NI Digital cables and accessories.
- Find the parts needed to make a custom cable, breakout fixture, or replace connectors and screws on NI Digital hardware.
- Browse dimensional drawings for NI Digital cables and accessories.