Answer / ripul ghosh

nowadays 24V DC relays are used compared to 230V what was used before..relays are mainly there to isolate the controller from high power lines,
The signal from the controller will come to the relay and it will get energised to drive the output load.

Answer / nirmalya basu

to energise a output by plc and for its protection purpose
also.

Answer / ganesh

the relay works with AC and DC.
it provide the isolation between controller and devices works on ac and dc.
it is extremely useful when you need to control a large amount of current or voltage with small electrical signal.

Answer / suresh agravat

Example pressure transmitter input showing fiied full with liquid than send singnal through output to relay. When relay deenergised motor contactor not get supply and it will be motor or pump stop. Relay is basically on/off switch

what are the following documents comes under loopchecking

1 Answers   Heisco,

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0 Answers   BMB, Enppi,

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What is the advantage of using locally fabricated hook ups over Pre fabricated hook ups in process instrumentation?

0 Answers   Engineers India Limited,

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If the vibration probe near to the shaft,then output voltage will be decreased r increased?How?

1 Answers   Amtek, Hamsco, IJT,

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what is ZERO SUPPRESION and ZERO ELEVATION?

3 Answers   Reliance,

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What is open loop checking and close loop checking

1 Answers   BARC, NTPC,

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WHAT ARE THE INSTRUMENTAL DIAGRAMSOF VALVES?

0 Answers   Artikal, ITC Infotech,

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What is pre-commissioning and commissioning ?

1 Answers   Armco,

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What is the difference between ff transmitter and non ff transmitter

0 Answers   Samsung,

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Can I route 110 VDC and 24 VDC in a same Duct for our Interposing relay cabinet? IF yes or NO Please provide me IEEE Std. for the same. Please i required it on Urgent basis, i need to design IRP Cabinets and we have MCC 110VDC and Our Coil side is 24VDC, Please help as soon as possible.

0 Answers   Yokogawa,

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If you SOURCE your outputs from a PLC, would you have to make the output HIGH, or LOW, in order to switch an output ON?

1 Answers  

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Briefly describe instrumentation job

1 Answers  

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