The National Instruments NI 9236 is an eight channel strain and bridge input module for CompactDAQ and CompactRIO systems. It provides 24 bit resolution and supports quarter, half, and full bridge measurements. The module is designed for mechanical testing, structural monitoring, load cell measurement, and sensor characterization.

Strain gauges and bridge sensors produce small differential signals. The NI 9236 provides signal conditioning and high resolution conversion for these sensors. Engineers can connect multiple bridge channels to a C Series system and acquire synchronized data.

Eight Bridge Input Channels

The NI 9236 provides eight input channels. The module supports quarter, half, and full bridge configurations. Bridge completion and excitation should be configured for the sensor type. Engineers should verify bridge resistance, excitation voltage, and wiring.

Proper wiring and shielding help reduce noise. Bridge sensors are sensitive to temperature and mechanical stress. Documentation of sensor type and bridge configuration helps repeatability.

Resolution and Sampling

The module provides 24 bit resolution. High resolution supports detection of small strain changes. Sample rate and filtering should be selected for the application. For dynamic tests, faster sampling may be needed. For static tests, averaging can improve results.

CompactDAQ and CompactRIO Integration

The NI 9236 is a C Series module and operates in compatible CompactDAQ and CompactRIO systems. It can be combined with analog input, digital I O, and communication modules. This integration supports mixed mechanical and electrical measurements.

Applications

The NI 9236 is suited to structural testing, load cell measurement, material testing, machine monitoring, and product validation. It supports multi point strain measurement in a compact chassis.

Installation and Maintenance

Installation requires a compatible C Series slot and bridge sensor wiring according to the product documentation. Channels should be labeled. The chassis should provide adequate cooling and protection.

Maintenance includes checking terminals, verifying bridge configuration, and confirming calibration. Documentation of sensor types and scaling helps maintain repeatability.

Summary

The National Instruments NI 9236 Strain and Bridge Input Module provides eight 24 bit bridge input channels for CompactDAQ and CompactRIO systems. It supports quarter, half, and full bridge measurements for mechanical testing and structural monitoring. The NI 9236 is a practical module for engineers who need multi channel strain input.