Honeywell 621-0020R Universal analog input module
The Honeywell Model 621-0020R Universal Analog Input Module (UAIM) allows you to access data analog input sources from up to 16. It contains an analog-to-digital converter (ADC) that converts the analog signal into a binary count.
The "R" suffix indicates that the module can be removed from the rack or inserted into the I/O rack to remain powered on. Other I/O modules in the rack continue to control the machine or process.
The analog input module receives the analog signal from the field device connected to the module terminal and converts the signal data to a 12-bit binary value (0 to 4095) via an analog-to-digital converter contained in the circuit of the module. The digital value is stored in the module's hold register and can be accessed by the logic manager control by the processor via the PULL instruction.
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