8T022F21PN-LC

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The 8T022F21PN-LC is classified in the miscellaneous category, and it is an analog data acquisition and conditioning module that captures thermistor-based temperatures in multiple channels and conditions them for use as linearized voltage or current outputs. It utilizes the Fletcher-Munson perceptual weighting curve for the temperature compensation of each channel. This piece of equipment is highly reliable, and is used mainly in industrial settings.

An 8T022F21PN-LC is composed of eight channels, each of which can accept signals from thermistors such as Negative Temperature Coefficient (NTC) and Positive Temperature Coefficient (PTC). Its overall accuracy is ± 0.3°C across the entire –40 − +125°C temperature range. The 8T022F21PN-LC also allows use of thermistor temperature curves to allow improved accuracy in measurement of extreme temperatures with the use of 100-point calibration. In addition, the self-test feature ensures that all channels are working properly before each operation.

The first step in using an 8T022F21PN-LC involves simultaneously connecting up to eight thermistors to each of the module\'s corresponding channels. After the thermistors have been connected, each channel can be individually configured by setting thresholds, selecting output types, and choosing LUT or straight line calculation methods. For example, users can set the output type for each channel individually as either standard-voltage, programmable-resistance, or programmable-current.

The module also takes into account environmental factors, with the use of a programmable version of the Fletcher-Munson perceptual weighting curve. This curve assists in the compensation of each channel to eliminate transmission losses through the atmosphere. This compensates for the distortion of sound, making it easier to measure temperatures over a wide range.

Once all the channels have been configured, they can be enabled by the use of a ‘start’ command and harnessed either for data acquisition or for control. Furthermore, a ‘read’ command enables communication between the module and PLC’s for further control/data acquisition obtainability. As such, data can be acquired directly via a calibration or from thermistor temperature curves.

For most applications, 8T022F21PN-LC\'s peak operating temperature is rated at 85°C, but special models are available which can operate up to 105°C. It also has an operating voltage range of +16 VDC to +40 VDC, which makes it suitable for use in industrial settings. In addition, its galvanic isolation makes it resistant to electrical shocks.

In summary, the 8T022F21PN-LC application field and working principle are versatile, and it offers reliability and accuracy for data acquisition, conditioning, and control in various industrial settings. Its multiple features, such as Fletcher-Munson perceptual weighting curve and output ‘read’ capabilities make it a preferred choice for data acquisition and controlling.

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