Description
NI SCXI-1000 | 4-Slot SCXI Chassis | National Instruments
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | National Instruments |
| Model | SCXI-1000 |
| Product Type | SCXI chassis |
| Chassis Capacity | 4 slots |
| Power Type | AC |
| SCXI Module Power Dissipation | 7 W per slot |
| Internal Supplies | +5 V, V+, V− |
| V+ Output Range | +18.5 to +25 V |
| V− Output Range | −18.5 to −25 V |
| +5 V Output Range | +4.75 to +5.25 V |
| Maximum V+ Load | 680 mA |
| Maximum V− Load | 680 mA |
| Maximum +5 V Load | 250 mA |
| Operating Temperature | 0 to 50°C |
| Storage Temperature | −20 to 70°C |
| Weight | 3.9 kg |
| AC Frequency | 47–63 Hz |
| Chassis Expansion | Up to 8 SCXI-1000 chassis can be daisy-chained |
| Status | Discontinued |
The SCXI-1000 has several regional AC variants, including 100 V Japan, 120 V North America, 220 V Korea/Swiss, and 240 V European, UK, Australian, and North American versions. The exact 776570-xx suffix therefore matters when replacing a chassis.
The original NI chassis manual specifies 7 W per slot and the internal DC supply ranges shown above. For the SCXI-1000, maximum AC current is listed as 0.6 A at 120 VAC, 0.5 A at 100 VAC, and 0.25 A at 220/240 VAC, with 47–63 Hz operation.
Product Introduction
The NI SCXI-1000 is a four-slot chassis designed to house and power National Instruments SCXI signal-conditioning and data-acquisition modules. The chassis does more than provide mechanical mounting: its backplane and controller handle SCXI timing, triggering, and signal routing between installed modules and the external DAQ device.
For a legacy SCXI installation, the chassis is part of the measurement architecture rather than a passive enclosure. A replacement therefore needs to preserve the installed SCXI module arrangement, power requirements, DAQ interface, and software environment. NI also documents daisy-chaining of up to eight chassis for larger channel-count systems.
SCXI-1000
Application Scenarios & Field Pitfalls — Engineer’s Perspective
Engineering Pain Point
When an begins failing, symptoms can appear at the module or DAQ-device level: modules may disappear, signal acquisition may become unstable, or the chassis may not be recognized by the host system. Power rails, chassis fuses, cabling, and driver compatibility should be checked before condemning an individual SCXI module.
Typical Applications
- Legacy NI SCXI data-acquisition systems
- Multi-channel analog signal conditioning
- Industrial test and measurement systems
- Laboratory and production test systems requiring multiple SCXI modules
Technical Pitfalls to Avoid
- Match the AC voltage variant.
is not one universal AC-input configuration. NI lists multiple 776570-xx part numbers for regional power versions. Verify the complete part number and rear-panel voltage configuration before replacement. - Check legacy software support before rebuilding the system.
NI states that NI-DAQmx versions above 19.0 no longer support SCXI devices. A physically good can therefore still be unusable in a modern software environment unless the legacy driver architecture is preserved. - Check chassis fuses and backplane power.
NI documents separate main-power and backplane fuse arrangements for variants. A failed backplane fuse can produce symptoms that look like a module failure.
Related Products
- NI SCXI-1000DC — Four-slot SCXI chassis using DC input rather than the AC-powered .
- NI SCXI-1001 — Twelve-slot AC chassis for larger SCXI installations; offers three times the slot capacity of .
- NI SCXI-2000 — Four-slot SCXI chassis with integrated RS-232/RS-485 communication capability; functionally different from .
- NI SCXI-1101 — Analog input module used inside SCXI chassis for signal conditioning and multiplexed acquisition.
- NI SCXI-1125 — Eight-channel isolated analog input module for SCXI systems.
- NI SCXI-1181 — SCXI breadboard module for custom signal-conditioning circuits.
- NI SCXI-2400 — Serial communication module providing RS-232/RS-485 functionality within an SCXI architecture.
Procurement Check
Before approving an replacement, verify:
- Exact model:
- Complete NI part number, such as 776570-01 through 776570-10
- AC input voltage and regional configuration
- Four-slot capacity
- Installed SCXI module types
- Backplane and chassis fuse condition
- Host DAQ device
- SCXI cabling and signal-routing configuration
- NI-DAQmx version
- Existing LabVIEW/NI-MAX environment
- Chassis recognition before and after replacement
- Fan and filter condition
- Replacement unit’s electrical test status
Recommended procurement description:
National Instruments 4-Slot AC SCXI Chassis, SCXI Data Acquisition Backplane, Module Power and Timing/Trigger Control, 7 W per Slot, Legacy NI SCXI Platform.
The important distinction is that is the chassis, not the SCXI measurement module. For a field replacement, the exact 776570-xx AC variant and legacy NI software environment are just as important as the designation itself.
