A pull-up resistor is required for the pulse signal output of electromagnetic flowmeters
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Hello, dear sea friends! The site requires the electromagnetic flowmeter to have a pulse signal output, but the manual for the electromagnetic flowmeter states that a 2KΩ pull-up resistor should be used. What is the function of this pull-up resistor? Thank you!
If they ask you to add it, you just add white; the purpose is to lure you into meddling and digging around........
What is a pull-up resistor? How to answer? In series or in parallel? Regardless of how it is connected, the purpose is to reduce the loop current
It should be to increase the amplitude of the pulse, that is, the peak voltage of the pulse.
This might be related to the circuit that receives the detection pulse, similar to the concept of sink current/source current in transistor circuits