NI SCXI-1349 – 68‑Pin Shielded Cable Adapter for SCXI-to-DAQ Integration

The NI SCXI-1349 is a shielded 68‑pin cable adapter designed to bridge a 68‑pin NI DAQ device (E/M/selected X Series) to an SCXI system in multiplexed mode. From my experience, this little adapter is the practical link that lets a single DAQ board scan many conditioned channels through one or more SCXI analog input modules, while keeping grounding and shielding tidy. If you maintain legacy test stands or need to keep an SCXI rack productive, the SCXI‑1349 typically makes that connection simple and robust.

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• Warranty period: 365 days
• Delivery time: 1 week for in-stock; no more than one month at the latest
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Key Features

• Direct 68‑pin connection – Mates standard NI 68‑pin shielded cables (e.g., SH68‑68 series) to an SCXI master module.
• Designed for multiplexed SCXI – Routes analog input, sample clock, and trigger lines between the DAQ device and the SCXI backplane for scanning many channels with one board.
• Shielded, low-noise layout – Helps preserve signal integrity across longer cable runs; in many cases this reduces ground loops and pickup in industrial cabinets.
• Passive adapter, no power – Nothing to power or configure on the adapter itself, which usually means fewer failure points.
• Legacy compatibility – Commonly used with NI E Series and many M Series DAQ boards; selected X Series devices supported where SCXI bridging is enabled in NI-DAQmx.
• Quick install – Attaches to the rear of the SCXI master module; the 68‑pin cable goes straight to the DAQ card or USB device.

Technical Specifications

Where it fits in

Typical scenario: an NI E or M Series DAQ with a 68‑pin connector sits in a PC, and you need to read 32–256 conditioned channels through SCXI modules (for example, thermocouples via SCXI‑1102 with terminal blocks). The SCXI‑1349 allows the DAQ’s analog inputs, clock, and triggers to link into the SCXI backplane so you can scan channels across modules in the rack. One thing I appreciate is how predictable it is in grounded industrial cabinets—shield continuity is straightforward and usually saves time during commissioning.

Field note from a customer: “We replaced a failing legacy adapter with the SCXI‑1349 and kept our existing SCXI‑1102 bank untouched. It took under an hour, and DAQmx recognized the chain right away.”

Related or Supporting Products

• NI SCXI-1346 – Cable adapter for alternate NI DAQ connector types (commonly used with different pinouts); choose based on your DAQ model’s connector.
• NI SH68-68-EP / SHC68-68-EPM – Shielded 68‑pin cables; low-noise, recommended for longer runs or electrically noisy panels.
• NI SCXI-1102 / SCXI-1100 series – Analog input modules for thermocouples and general-purpose sensors; often used as the master with the SCXI-1349.
• NI SCXI-1000 or SCXI-1001 – SCXI chassis to house and power the modules.
• NI PCI‑6251 / PCIe‑6341 (selected models) – 68‑pin DAQ devices that, in many cases, support SCXI bridging via NI-DAQmx. Check software revision and device support notes.
• Modern alternative: NI cDAQ + C Series modules – If you’re phasing out SCXI, cDAQ systems provide modular conditioning without the SCXI bridge; configuration differs but covers similar measurements.

Installation & Maintenance

• Mounting – Install the SCXI‑1349 on the rear of the designated SCXI master module (slot 1 in many setups). Secure screws evenly; avoid stressing the connector.
• Cabling – Use shielded 68‑pin cables (e.g., SH68‑68‑EP). Maintain bend radii and add strain relief if the cabinet door moves. Tie the cable shield to a single ground reference to minimize loops.
• Ventilation – Follow SCXI chassis guidelines; ensure front-to-back airflow is not obstructed. The adapter itself does not generate heat.
• Wiring & Grounding – Keep sensor returns consistent (AI SENSE/REF). You might notice cleaner readings when the chassis ground is bonded to the cabinet star ground.
• Software – Use NI-DAQmx versions that support your DAQ + SCXI combination. Older builds may require Traditional NI‑DAQ for certain E Series cards.
• Routine care – Periodically inspect and clean the 68‑pin connector with ESD-safe tools; reseat connectors if vibration is present. Firmware updates apply to DAQ devices, not this passive adapter.
• Safety – De-energize the system before install; observe ESD precautions. Verify that the SCXI chassis power is off during adapter changes.

Quality & Certifications

• Certifications – NI hardware typically carries CE marking; RoHS compliance applies to most later SCXI production. Manufacturing under ISO 9001 quality systems.
• Manufacturer’s warranty – NI standard hardware warranty is commonly 1 year for new units; legacy/renewed stock may vary by region and condition.
• Our coverage – We provide a 365‑day warranty on this item as part of our order guarantees above.