This article describes the design and working of a simple hardwired alarm annunciator circuit . What is alarm annunciator Alarm annunciator is a warning and…
EOL resistor and Line monitoring using EOLR ? (end of line resistors).what are these terms?EOLR Or End of line resistors .What are they? A specially…
To bring the process in a required way is the ultimate aim in any industrial environment . process variables need to be monitored and controlled…
Two out of three logic a popular control scheme used in critical facilities .They are voting schemes which ensure a process condition status .These control…
Sinking and sourcing concepts Sinking and sourcing .A simple but a confusing concept among industrial automation experts . especially in industrial automation systems . In …
NPN and PNP type of sensors,two sensor types used especially in industrial automation environment .These specification related to three wire sensors like proximity sensors. Selection of…
4 wire 3 wire 2 wire signal modes Process parameters are signalled to control panels or monitoring devices in various ways . Electric form of…
SPST SPDT DPST DPDT SWITCHING What is SPDTswitch! What is SPDT relay? DPDT,3PDT,3PST........ What are they? Heard about this ?.. SPDT .....single pole double throw…
pressure switch a familiar device used in process control applications .we know they sense pressure and changes the status of contact output about a setpoint…
What is potential free contact ? Is there such a thing? A contact in a electrical or electronic circuit allows or blocks passage of power…
4-20 mA to 1-5 V conversion Most of transmitters use 4-20 mA as ay signal standard for transmitting process parameters .Two wire method is common…
Current and voltage, two variables which have a great importance in engineering technology . Electronics systems, instrumentation, telecommunications,Robotics,house hold applications, utilities,we can sense them in …