The National Instruments cDAQ-9189, part number 142143B-12L, is an eight slot Ethernet CompactDAQ chassis for C Series modules. It supports time sensitive networking, which allows synchronized data acquisition across networked chassis and devices. The chassis is used in distributed measurement systems, industrial monitoring, and automated test applications where multiple measurement points must be aligned in time.
The eight slot format supports mixed measurement systems in one chassis. Modules can include analog input, analog output, digital I O, counters, temperature, strain, and sound and vibration. Ethernet connectivity allows the chassis to be placed near equipment while the host computer remains in a control room or laboratory.
Eight Slot Modular Architecture
The cDAQ-9189 provides eight slots for compatible C Series modules. This slot count supports complex measurement systems that combine several signal types. Engineers should plan slot assignment by signal type, power draw, and connector access.
Documenting the slot map keeps software channel names aligned with physical positions and simplifies maintenance.
Ethernet and Time Sensitive Networking
The chassis uses Ethernet to connect to a host or network. Time sensitive networking supports synchronized timing and deterministic communication in compatible networks. Engineers should plan IP addressing, network switches, and cybersecurity.
For distributed systems, multiple chassis can be used at different locations. Network architecture should consider bandwidth, latency, and synchronization.
Timing and Synchronization
The cDAQ-9189 includes timing and synchronization features for CompactDAQ modules. Engineers can use hardware timing, triggers, and shared clocks to align measurements. Time sensitive networking can support synchronized acquisition across networked devices.
Timing configuration depends on module types and application requirements. Some measurements require simultaneous sampling, while others can use multiplexed scanning.
Software and Application Development
The chassis is designed to work with NI data acquisition software and standard programming environments. Engineers can configure channels, set sample rates, create triggers, log data, and build user interfaces.
For automated test, the chassis can be integrated into sequences that control stimuli and acquire responses. For monitoring, it can run continuous acquisition and log data to disk.
Applications
The cDAQ-9189 is suitable for distributed sensor monitoring, industrial automation, energy systems, and laboratory test. It supports mixed signal acquisition in a networked chassis with synchronized timing.
Installation and Maintenance
Installation requires mounting the chassis, connecting power and Ethernet, and inserting modules. The chassis should be placed where airflow is not blocked and ambient conditions are within the operating range.
Maintenance includes checking module seating, inspecting connectors, verifying network communication, and reviewing software configuration.
Summary
The National Instruments cDAQ-9189 Ethernet CompactDAQ Chassis provides eight C Series slots and time sensitive networking support for distributed measurement. It supports mixed signal acquisition, synchronized timing, and network integration. The cDAQ-9189 is a practical chassis for networked test and industrial applications.
