SMT Equipment

Allen Bradley 1794-IE12 /A Analog Input Module Flex I/O

Allen Bradley 1794-IE12 /A Analog Input Module Flex I/O

Allen Bradley 1794-IE12 /A Analog Input Module Flex I/O

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Allen Bradley 1794-IE12 /A Analog Input Module Flex I/O

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Board Handling - Pallets, Carriers, Fixtures

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PLC&DCS Guys

   

Allen Bradley 1794-IE12 /A Analog Input Module Flex I/O Description:

#Contact
Unik You
unik@cambia.cn
+86 18030205725

  

As shown in the block diagram below, each input channel of the module consists of an RTD/resistance connection that accepts excitation current; a sense connection that detects lead wire resistance; and a return connection. The signals are multiplexed to an A/D converter that reads the RTD or resistance value and the lead wire resistance

From the readings taken by the converter, the module returns an accurate temperature or resistance to the controller user program through the microprocessor. The module uses two bidirectional serial ports for communication, each using an optocoupler for isolation. A third optocoupler is used to reset the microprocessor if the module detects a loss of communication.

The input module performs autocalibration when a channel is initially enabled. Autocalibration compensates for offset and gain drift of the A/D converter caused by temperature change within the module. An internal, high-precision, low drift voltage and system ground reference is used for this purpose. In addition, you can program the module to perform a calibration cycle once every 5 minutes. See Selecting Enable/Disable Cyclic Autocalibration (Word 6, Bit 0) on page 65 for information on configuring the module to perform periodic calibration.

  

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Allen Bradley 1794-IE12 /A Analog Input Module Flex I/O was added in Apr 2021

Allen Bradley 1794-IE12 /A Analog Input Module Flex I/O has been viewed 208 times

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