CQ3302 Sensors, Transducers

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Current transducers play an important role in both industrial and household applications. In this regard, a precise current transducer is a must if precise electrical measurements and control are required. One such important current transducer type is the CQ3302, the technical features and working principles of which are explained in this article.

CQ3302 is a digital current transducer developed by TE Connectivity. It is an isolated 4-20mA current converter that offers precise and reliable measurements for currents ranging from 0 to 32A. It serves a wide range of applications in both commercial and industrial environments, including automotive, aerospace, and alternative energy. This device provides a cost-effective solution for converting current signals to DC voltages, as well as for providing electrical isolation between the input and output signals. It is also resistant to electromagnetic drift and immune to reverse polarity current.

The CQ3302 current transducer works on the principle of transformers. The primary side of the transformer transforms the current signal into a voltage signal. This voltage signal is then fed into a comparator circuit, which converts the voltage signal into a pulse-width modulated (PWM) signal. The PWM signal is then shaped and filtered in order to obtain a clean, precise signal for output. This output is then converted into a DC voltage signal and isolated from the input signal.

The CQ3302 current transducer has numerous features that make it ideal for industrial applications. It has a response time of less than 20μS, and can be used to measure currents up to 16A with a resolution of 0.125mA. It has an operating temperature range of -20°C to +80°C, making it suitable for use in harsh environmental conditions. It is also equipped with a built-in error amplifier, which eliminates the need for external input potentiometers and other controls. Furthermore, since the device is reflective type, it does not require a power supply, making it easier to use in remote applications. Finally, the device is resistant to radio frequency interference (RFI), making it suitable for applications in potentially noisy environments.

The digital output of the CQ3302 current transducer is suitable for use in many industrial applications, such as process control, energy management, and motor control. In addition, the device is ideal for many communications applications, since it is compatible with most standard communication protocols, including RS485, CANbus, and Ethernet. Furthermore, the device is capable of interfacing with a wide variety of analog input transducers, providing a cost-effective solution for integrating current sensing and digital data acquisition.

The CQ3302 current transducer is an ideal solution for many industrial applications, since it offers a combination of performance, accuracy, and flexibility. It can be used in a variety of production and control processes, and is suitable for both commercial and industrial environments. In addition, its reflective type operation eliminates the need for a power supply, making it easier to integrate into remote applications. Finally, its compatibility with most standard communication protocols provides a cost-effective solution for integrating current sensing and digital data acquisition.

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