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in a electronic controller why we are using 250 ohm
resistance in input signal?is i/p is necessary in control
valve when we are using electronic controller give details?
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Answer Posted / vishal sharma
we need 250 ohm resistane because when we need to opearte
any loop eg.line pressure control loop er need to instal
pressure transmitter in line after control valve on that
time if we instal 250 ohm resistane in controller we dont
have to need another SMPS install for 24v signl to pressure
trasmitter for 2-wire system after install 250 ohm
resistance we recive 24v output trrough controller.
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