This guide addresses many common questions for the most popular NI DAQ 68-pin SCSI D-Type cables: SH68-68-EPM, SH68-68, SH68-68-D1, SH68-68R1-EP, and R68-68. NI 68-pin SCSI cables are primarily used on previous generations of NI DAQ hardware family models, USB-62xx (formerly M Series), NI 61xx (formerly S Series), and NI 60xx/60xxE (formerly B Series and E Series). The cables feature 68-pin 0.050 SCSI D-Type connections on both sides, with options for unshielded ribbon cables, as well as enhanced performance noise reducing cable assemblies. Whether you are purchasing a new cable, 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.
This guide is intended to cover the most popular SCSI 0.050 68-pin cables designed for use with NI DAQ devices. It does not cover similar cables for other NI product lines, even if they share the same connectors.
This section provides a brief summary of acronyms and terminology used on these SCSI 68-pin cables. For more in depth information about other SCSI connectors as well as the terminology listed on this page, visit the main DAQ cables guide.
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.
NI offers a wide range of cables to work with different DAQ 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.
Model | Device Connector | Accessory Connector | Shielded? | Twisted Pairs? | Application Notes |
---|---|---|---|---|---|
SH68-68-EPM | SCSI | SCSI | Yes | Yes | Improved high performance noise reduction. |
SH68-68-EP | SCSI | SCSI | Yes | Yes | High performance noise reduction, previous generation. |
SH68-68R1-EP | SCSI | SCSI | Yes | Yes | High performance noise reduction with right-angle connector for enclosures. |
SH68-68 | SCSI | SCSI | Yes | Yes | Cost effective, basic shielding, some noise reduction. |
SH68-68-D1 | SCSI | SCSI | Yes | Yes | Basic shielding for counter/timer applications. |
SH68-68-S | SCSI | SCSI | Yes | Yes | Cost effective, basic shielding, some noise reduction. Recommended for models with extended AI. |
SH68-50 | SCSI | IDC | Yes | Yes | Basic shielding, some pins grounded. |
R68-68 | SCSI | SCSI | No | No | Low-cost, no noise reduction. |
R68-50 | SCSI | IDC | No | No | Low-cost, no noise reduction, some pins grounded. |
This section contains a summary of information frequently sought when installing or customizing 68-pin SCSI DAQ 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 , Conductor Size |
Signal Wires: 30 AWG |
+5V Wires: 26 AWG |
See Dimensional Drawing for more information |
Bend Radius |
Cable Outer Diameter: 0.540 in. (13.7 mm) |
Bend Radius: 6.5 in. (165 mm) |
See Dimensional Drawing for more information |
Resources |
Detailed Information | |
Wire mapping or pinout with wire colors: See Dimensional Drawing | |
Shielding: Individually shielded analog pairs, separate analog and digital groupings, entire cable assembly | |
Twisted Pairs: Analog pairs, some digital lines | |
Connector Part Number and Jackscrews: See Dimensional Drawing and Custom Connectors Guide | |
Cable Part Numbers:
|
Device or Module Side Cable Pinout |
Accessory Side Cable Pinout |
Wire Gauge , Conductor Size |
Signal Wires: 28 AWG |
+5V Wires: 20 AWG |
See Dimensional Drawing for more information |
Bend Radius |
Cable Outer Diameter: 0.540 in. (13.7 mm) |
Bend Radius: 6.5 in. (165 mm) |
See Dimensional Drawing for more information |
Resources |
Detailed Information | |
Wire mapping or pinout with wire colors: See Dimensional Drawing | |
Shielding: Individually shielded analog pairs, separate analog and digital groupings, entire cable assembly | |
Twisted Pairs: Analog pairs, some digital lines | |
Connector Part Number and Jackscrews: See Dimensional Drawing and Custom Connectors Guide | |
Cable Part Number: P/N 187051-01 |
Device or Module Side Cable Pinout |
Accessory Side Cable Pinout |
Wire Gauge , Conductor Size |
Signal Wires: 30 AWG |
+5V Wires: 30 AWG |
See Dimensional Drawing for more information |
Bend Radius |
Cable Outer Diameter: 0.425 in. (10.8 mm) |
Bend Radius: 5.1 in. (130 mm) |
See Dimensional Drawing for more information |
Resources |
Detailed Information | |
Wire mapping or pinout with wire colors: See Dimensional Drawing | |
Shielding: Entire cable assembly | |
Twisted Pairs: Each digital line | |
Connector Part Number and Jackscrews: See Dimensional Drawing and Custom Connectors Guide | |
Cable Part Numbers:
|
Device or Module Side Cable Pinout |
Accessory Side Cable Pinout |
Wire Gauge , Conductor Size |
Signal Wires: 28 AWG |
+5V Wires: 28 AWG |
See Dimensional Drawing for more information |
Bend Radius |
Cable Outer Diameter: 0.420 in. (10.7 mm) |
Bend Radius: 5.1 in. (130 mm) |
See Dimensional Drawing for more information |
Resources |
|
Detailed Information | |
Wire mapping or pinout with wire colors: See Dimensional Drawing | |
Shielding: Separate analog and digital groupings, entire cable assembly | |
Twisted Pairs: Analog pairs, some digital lines | |
Connector Part Number and Jackscrews: See Dimensional Drawing and Custom Connectors Guide | |
Cable Part Numbers: |
Device or Module Side Cable Pinout |
Accessory Side Cable Pinout |
Detailed Information | |
Wire mapping or pinout with wire colors: Not available | |
Shielding: None | |
Twisted Pairs: None | |
Connector Part Number and Jackscrews: See Custom Connectors Guide | |
Cable Part Numbers:
|
This section is a summary of the most common use cases. Please refer to the compatibility guide for complete coverage for your device or module with your cable and connector block or terminal block.