Description
NI SCXI-1001 | 12-Slot SCXI Chassis | Legacy Data Acquisition Platform
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | National Instruments |
| Model | SCXI-1001 |
| Product Type | SCXI chassis |
| Module Capacity | 12 slots |
| Chassis Power | AC |
| Internal Analog Buses | 3 |
| V+ Supply | 18.5 to 25 V |
| V− Supply | −18.5 to −25 V |
| +5 V Supply | 4.75 to 5.25 V |
| V+ Maximum Load | 2.04 A |
| V− Maximum Load | 2.04 A |
| +5 V Maximum Load | 600 mA |
| Power Dissipation | 7 W per slot |
| Operating Temperature | 0 to 50°C |
| Storage Temperature | −20 to 70°C |
| Humidity | 10 to 90% RH, noncondensing |
| Maximum Altitude | 2,000 m |
| Weight | Approximately 6.8 kg |
| AC Frequency | 47–63 Hz |
| Typical AC Input Options | 100, 120, 220, or 240 VAC variants |
The SCXI-1001 uses the SCXI backplane architecture to distribute module power and provide system-level timing, triggering, and signal routing. NI documentation specifies the internal supply rails and maximum chassis loads above.
Product Introduction
The NI SCXI-1001 is the large-format chassis in the legacy SCXI data-acquisition platform, providing 12 slots for SCXI signal-conditioning and switching modules. The chassis does more than mechanically hold the modules; it supplies the required internal power and coordinates timing, triggering, and signal routing between SCXI modules and the associated DAQ device. NI specifies that multiple SCXI-1001 chassis can be daisy-chained for high-channel-count applications.
For an existing test, measurement, or laboratory automation system, the main value of a replacement SCXI-1001 is architectural compatibility. A mechanically similar chassis is not automatically equivalent because the installed SCXI modules, DAQ interface, chassis addressing, cabling, and legacy NI software stack all have to work together.
SCXI-1001
Application Scenarios & Field Pitfalls — Engineer’s Perspective
Engineering Pain Point
The is often replaced after a chassis power fault, fan problem, backplane issue, or aging component causes several otherwise healthy SCXI modules to appear unavailable. Before condemning individual modules, check the chassis power rails and communication path.
Typical Applications
- Legacy NI SCXI data-acquisition systems with multiple signal-conditioning modules
- High-channel-count laboratory test systems
- Industrial test and measurement equipment using SCXI analog or switching modules
- Research and automated measurement systems built around older NI-DAQ/LabVIEW architectures
Technical Pitfalls to Avoid
- Do not confuse the with an SCXI measurement module.
It is the chassis that provides the infrastructure for the installed modules. Replacing it with a module-level component will not solve a chassis-level fault. - Check the AC input variant carefully.
units were produced in different AC configurations, including 100, 120, 220, and 240 VAC versions. The exact part number and nameplate should be matched before replacement. - Verify the software environment before recommissioning.
NI states that NI-DAQmx versions above 19.0 no longer support SCXI devices. An otherwise functional replacement chassis can therefore remain unusable if the host computer has been migrated to an unsupported driver environment.
Related Products
- NI SCXI-1000 — Four-slot AC SCXI chassis; suited to smaller legacy SCXI installations.
- NI SCXI-1000DC — DC-powered four-slot SCXI chassis for applications requiring a DC input architecture.
- NI SCXI-1101 — SCXI analog input module for signal conditioning and multiplexed measurement.
- NI SCXI-1125 — SCXI isolated analog input module used for multichannel voltage/current measurement.
- NI SCXI-1140 — SCXI analog input module designed for dynamic signal acquisition.
- NI SCXI-1163R — SCXI digital output module for legacy automated test and control applications.
- NI SCXI-1349 — SCXI interface hardware used to connect an SCXI chassis to compatible DAQ hardware.
- NI PXIe-1085 — Modern PXI Express chassis listed by NI as a suggested replacement path for the discontinued , although it is not a drop-in SCXI replacement and requires system-level migration planning.
Procurement Check
For a replacement , verify:
- Exact model
- Full NI part number, such as 776571-01, 776571-02, 776571-05, 776571-07, etc.
- AC input voltage variant
- 12-slot backplane condition
- Chassis power supply performance
- Fan and cooling condition
- Installed SCXI module types
- Chassis addressing configuration
- SCXI-to-DAQ interface hardware
- Existing NI-DAQ/LabVIEW environment
- Host computer compatibility
- Condition of backplane connectors and module guides
Recommended procurement description:
National Instruments NI 12-Slot AC SCXI Chassis, Legacy SCXI Data Acquisition Platform, 3 Internal Analog Buses, Multi-Module Signal Conditioning and DAQ Chassis.
The critical point is that is system infrastructure, not a measurement card. When sourcing a replacement, matching the chassis model alone is insufficient; the AC variant, installed SCXI modules, interface hardware, and legacy NI software environment should all be checked before installation.
