The National Instruments eDAQ-9174 is a four slot USB CompactDAQ chassis designed for rugged and mobile data acquisition. It accepts C Series modules and connects to a host computer over USB. The chassis is used in field testing, vehicle measurement, portable diagnostics, and industrial data acquisition where a standard benchtop chassis may not withstand the environment.
CompactDAQ systems combine a chassis, C Series modules, and a host computer. The eDAQ-9174 provides four slots in a rugged enclosure, so engineers can assemble a measurement system with analog input, digital I O, counters, and other module types. The USB interface keeps setup simple and allows use with laptops.
Four Slot Configuration
The chassis provides four slots for compatible C Series modules. This slot count supports focused measurement systems that need several signal types in one enclosure. Engineers should plan slot assignment according to signal type, power draw, and connector access.
Documenting the slot map keeps software channel names aligned with physical positions, which simplifies commissioning and service.
Rugged Enclosure and Power
The eDAQ-9174 is built for environments where vibration, temperature variation, and handling are part of normal operation. Engineers should verify the operating temperature range and environmental ratings for the installation. Power should be supplied within the specified input range, and power cables should be secured against vibration.
Where the chassis is installed in a vehicle or moving platform, mounting and cable strain relief deserve particular attention. Loose cables can cause intermittent connections that are difficult to diagnose.
USB Connectivity
The chassis uses USB to communicate with a host computer. Engineers should verify host USB capability and cable quality, and should select a cable length that suits the installation. Strain relief at both ends helps prevent damage.
For portable systems, the chassis can be placed near the sensors while the computer remains in a protected location.
Software and Data Handling
The chassis is designed to work with NI data acquisition software and standard programming environments. Engineers configure channels, set sample rates, create triggers, and log data. For field use, local buffering and efficient file writing help prevent data loss if the host is interrupted.
Applications
The eDAQ-9174 is suited to vehicle testing, field diagnostics, portable measurement, and industrial data acquisition. It supports mixed signal measurement in a compact and rugged chassis.
Installation and Maintenance
Installation requires mounting the chassis securely, connecting power and USB, and inserting modules. Cables should be routed to avoid strain and interference. Maintenance includes checking connectors, verifying module seating, and reviewing software configuration.
Summary
The National Instruments eDAQ-9174 CompactDAQ Chassis provides four C Series slots in a rugged USB enclosure for portable and field data acquisition. It supports mixed signal measurement with simple connectivity. Careful mounting, power planning, and cable management make the chassis a practical choice for mobile and industrial test applications.
