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Analog I/O devices make use of analog signals (e.g., output of transducers) and present output in analog format. Generally, an analog I/O device supports both analog input and analog output .
Types of Analog I/O devices
There are different types of analog I/O devices available in the market, such as analog modules, analog I/O boards, analog I/O cards, analog input cards, analog output cards, and USB analog I/O.
Analog I/O modules : Analog I/O modules are available in several models, and these models provide eight channels of line-level analog to digital conversion and eight channels of line-level digital to analog conversion.
An analog I/O board: An analog I/O board is used to record analog signals from any instrument using data acquisition system. In addition, it is used to generate the analog signals for any instrument.
Analog I/O card: An analog I/O card refers to an analog output card, used in applications where the outputs other than on and off states are generated. Basically, an analog I/O card consists of the analog input card at the input and analog output cards at output. Features of analog input card include ability to acquire analog data in harsh electrical environment with computers and other compatible devices.
USB analog I/O: A USB analog I/O refers to a device, used for interfacing a PC with a number of real world analog inputs or outputs.
Specifications
1. Analog I/O device 1/2-channel output module
Output current : 4.20 mA
Output voltage : -10 to +10 V DC
2. Analog I/O card
12-bit differential input channels with ± 1 conversion accuracy
Input ranges: 0-1V, 0-5V, 0-10V, ±5V, ±10V, 0-20 mA and 4-20 mA
3. Analog I/O module as DC current input module
-Four input channels
-Range of input current: 0 to 20 mA DC
-Range of voltage: 10V to 36V
4. Analog I/O module as DC Voltage output module
-Four channel analog output
-Output voltage range: 0 to 10 V DC
Applications:
Applications of analog I/O devices include PC based measurement, analysis, control and monitoring, programmable voltage sources or current sink, servo control, and process control.
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