The A142 comes with three 18-Bit, 20 kHz analog inputs (SAR ADC). You can use two inputs for LVDT/RVDT sensors or strain gage-based transducers, allowing you to use dual-bridge load cells for critical force control applications. The third analog input is a 10 VDC voltage input that can be freely configured for, for example, a potentiometric sensor or an external function generator as input for the PID controller. An additional Synchronous Serial Interface (SSI) makes the A142 unique. SSI is a point-to-point serial communication standard for digital data transmission between a master and a slave. SSI is commonly used with absolute encoders, as well as with Temposonics position sensors from MTS Sensors.

What is SAR ADC?

The method of Successive Approximation Register (SAR) is a method used in A/D converters for converting the analog signal into a digital signal. It is based on the comparison of the analog input voltage with a reference voltage. In successive approximation, the comparison is made step by step and is repeated continuously, whereby the reference voltage is changed so that it increasingly approaches the input voltage. Unlike a sigma-delta ADC, the SAR architecture does not have latency. The relatively high sample rate and zero-latency make the SAR ADC suitable for closed-loop control applications.

Key Features:

• 2 Analog inputs for strain gage transducers or LVDT/RVDT sensors
• 1 Synchronous Serial Interface (SSI)
• 1 10 VDC analog input
• 1 10 VDC analog output
• 4 Digital inputs and outputs
• 20 kHz update rate
• Low-latency 18-Bit SAR ADC
• 500 VDC galvanic isolation for all analog inputs
• Onboard virtual channels for scaling, filtering, and calculations
• Available in Q.bloxx X, Q.brixx X or Q.raxx X packaging
• Optionally as EtherCAT slave module (XE version)
• 15 Pin standard D-sub connectors

Read more about our Q.series X Data Acquisition System here.