Product Description

The 7AI261.7 is an advanced Analog Input Module from the 2003 B&R module series, designed by B&R automation. This module is tailored for the evaluation of full-bridge strain gauges and features a differential input type with 24-bit resolution, ensuring high precision in data acquisition. With a single input, it caters specifically to the needs of strain gauge measurements, offering detailed and accurate readings.

The module employs a Sigma Delta conversion method with a conversion time of 1 ms and an application scan time ranging from 4-100 ms, providing flexibility for various industrial applications. The data output rate on the module can be set between 7-500 Hz via software, allowing customization based on specific requirements. Shielding is meticulously designed to enhance performance: on the module side, a stress relief clamp is used, while on the sensor side, a 10 nF/630 V HF foil capacitor grounded to the sensor housing ensures optimal signal integrity. The module's static characteristics include an input current of <140 nA and an operating range for the measurement sensor from 75 to 5000 ?. It delivers a bridge voltage of 4.5 VDOC +3%/max, 60 mA, with built-in short circuit and overload protection to safeguard the system.

The effects of cable length are minimized by using shielded, twisted pair cables as short as possible, running separately to the sensor without intermediate terminals. The module outputs digital values during overload conditions: a broken supply line causes the value to drop to zero, while a broken sensor line pushes the value to the positive limit. Software evaluation is facilitated through configuration word 12. The 7AI261.7's robust features and precision make it an indispensable component for modern automation systems requiring high accuracy and reliability in strain gauge measurements.