The NI SCXI-1346 is a passive multi-chassis adapter that bridges 68-pin E Series DAQ devices to SCXI chassis and modules, enabling modular expansion of data acquisition systems. This interface adapter routes timing, control, and analog signals between the DAQ board and SCXI backplane without requiring external power—drawing current from the connected DAQ device or previous chassis in the chain. Operating reliably across cable runs not exceeding 10 meters, the SCXI-1346 supports multi-chassis configurations and integrates with NI-DAQmx driver software.
– Technical Specifications
• Model: SCXI-1346
• Product Family: SCXI Series Cables/Adapters
• Function: Passive SCXI–DAQ bridge adapter
• Power Requirement: No external power; powered by connected DAQ device or previous chassis
• Maximum Cable Length: 10 meters in multi-chassis SCXI system
– Key Features
• Two 68-pin male connectors (front panel): “TO NEXT CHASSIS” and “FROM DAQ BOARD OR PREVIOUS CHASSIS”
• One 50-pin male breakout connector (PCB-mounted)
• One 50-pin female bracket-mounted connector (rear panel)
• Signal routing includes timing, control, and analog lines with proper shielding and pin mapping
• Compatible with NI-DAQmx driver software
– Compatibility & Integration
DAQ Compatibility:
• Connects any 68-pin E Series DAQ device (excludes 61XXE series) to SCXI modules
SCXI Chassis Support:
• Compatible with SCXI-1001 and SCXI-1000 (revision K or higher) chassis
• One SCXI-1346 required per chassis (except the final chassis, which uses SCXI-1349)
• Supports up to eight SCXI chassis in daisy-chain configuration
• SCXI-1000 chassis cannot be used in multi-chassis systems
Module Exclusions:
• Not compatible with SCXI-1127, SCXI-1128, SCXI-1190, or SCXI-1191 modules
• Module immediately right of connected module cannot use external rear 50-pin connector
Signal Distribution:
• 50-pin breakout connector routes signals to downstream modules or SCXI-1180 feedthrough panels (SCXI-1346 and SCXI-1349 breakouts only)
• Each SCXI chassis requires unique address assignment (SCXI-1001 uses DIP switch addressing)
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