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4-20ma is a type of signal transmission.
- A process value, such as pressure, RPM, or whatever, is converted into a current in the range of 4ma to 20ma and sent out on a twisted pair cable.
- The receiver passes the current through a resistor, converting it back to voltage, and processes it accordingly. If that resistor were 250 ohms, the voltage would be 1-5v.
- An offset of 4ma is used so that the receiver can detect an open connection.
- The ground or power reference is usually maintained at the transmitter, but sometimes it is at the receiver.
- A twisted pair cable is used so that the effect of common mode noise is minimized.
- The receiver is usually an opamp so that the effect of common mode voltage is minimized.
What else can I help you with?
What is the motto of Grainger plc?
Grainger plc's motto is 'Grainger = Residential'.
What is the motto of Whatman plc?
Whatman plc's motto is 'Leadership in separations technology for the life sciences'.
Which ownership is blockbuster under?
block buster is a plc
What is future scope of automation PLC in India?
simply tremendous
What does PLC mean in electrical?
PLC stands for Programmable Logic Controller. Basically its like a small computer that uses simple logic to execute automated processes, like in a factory. Lets say there is a factory that test balls for color. The desired color is Red and any other color is discarded. With the help of senors, the PLC will determine if the Ball is of Acceptable color and either trigger a sequence that transfers the ball to a different location, or kicks the balls of different colors out from the Passable balls. There are many types of PLC's. Some examples are SLICK 500 and Allen-Bradley. How ever this is only a small example of what PLC's are capable of doing.
What are the top ten insurance companies in Nigeria?
Staco insurance plc. Leadway insurance plc Law union and rock insurance plc Aiico Niger insurance plc Consolidated hallmark insurance Goldlink insurance plc. Custodian insurance plc NEM insurance plc Mutual assurance plc
What is meant by plc scan time?
PLC Scan Time means plc requires some operating cycle to Plc input verification,Plc output updates and Execution of program.
Where are caradon plc shares?
caradon plc was taken over by novar plc,they have now been taken over by melrose plc. is this usefull
What is an example of a plc?
natwest bank plc
Is Alton towers an Ltd or a Plc?
plc
What is the full name PLC?
Meaning of PLC
How many types of PLC?
there r 16th types of plc ok
Is McDonald's a PLC company?
Yes, McDonald's is a PLC.
How PLC store a program?
how a plc stores a programme and executes it
When was SABMiller Plc created?
SABMiller Plc was founded in 2002
Is tecos a limited company or a plc?
It is a PLC, floated on the FTSE.
When was NTR plc created?
NTR plc was created in 1991.
