why we are using (-24VDC) and where we r using plz tell me

Categories >> Engineering >> Instrumentation
Suggest New Category

Question Posted / pandu

7 Answers
7716 Views
I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

why we are using (-24VDC) and where we r using plz tell me..

Answer / mugil

In Vibration Monitoring System -24V DC is using to Proximity sensor(Bently Naveda).
Because PNP transistor is used in this proximity sensor.The PNP transistor bsae voltage is negative 24v supply.That's why -24v DC supply is using.
When the probe is in air it will have no induced voltage
so all -24 voltage without induced voltage will return back.

Is This Answer Correct ?

8 Yes

1 No

why we are using (-24VDC) and where we r using plz tell me..

Answer / asif.k64@hotmail.com

-24V DC is used for Telecom server and equipment, as positive terminal is grounded.

Is This Answer Correct ?

2 Yes

0 No

why we are using (-24VDC) and where we r using plz tell me..

Answer / md. afroz alam

I am confuse tell me PNP using or NPN

Is This Answer Correct ?

1 Yes

0 No

why we are using (-24VDC) and where we r using plz tell me..

Answer / pandu

mugil ji your answer is correct and one thing in plc, is it possible to use -24vdc

Is This Answer Correct ?

0 Yes

0 No

why we are using (-24VDC) and where we r using plz tell me..

Answer / asif.k64@hotmail.com

In telecom Industry, Telecom devices use -24 Volts DC, as positive terminal is grounded.

Is This Answer Correct ?

0 Yes

0 No

why we are using (-24VDC) and where we r using plz tell me..

Answer / mugil

Mr.Pandu,

-24V DC You can use in PLC also.Normally Phase and Neutral is using for +24VDC. but in -24 V DC case you should change the connection Phase to ground and Neutral to Phase.

Is This Answer Correct ?

0 Yes

0 No

why we are using (-24VDC) and where we r using plz tell me..

Answer / md. afroz alam

Mugli ji I am confused with your answer using PNP transister or NPN transister tell me pls

Is This Answer Correct ?

0 Yes

0 No

Post New Answer

More Instrumentation Interview Questions

I installed the smartplant instrument v8, but can not be opened, that always said: "INTools 2007 hardlock no found". So Could you help me how to do for that?

0 Answers SRAAC,

what is datum line?

4 Answers

What are different types of control valves?

0 Answers

when the instrument tapping on pipe line is located below and transmitter is located above the tapping point for liquid service transmitter, what should we do, is there any additional drain valve is required??

2 Answers

what is meant by Valve reversibility?

2 Answers

is manifold required for an integral orifice meter?

2 Answers

a laways iface problem with brine level transmitter sealing diaphram a laways giving error and maximum reading i made re range and adjust with side glass but during commission it giving gap reading between it and side glass i need help from expert to explain how to calibrate it. note:dp transmitter yokogawa company

1 Answers

where using the 0-20ma in feiled instrumentation? why its using?

4 Answers

which flow meter is use for measuring the open channel flow?

2 Answers

where proximity sensor installed on tank in loading arm application

0 Answers

I want to buy a seal kit of a pneumatic power cylinder.But I don't know it's specification.So please help me to know its specification.

0 Answers

Define all the process Variable and state their unit of measurement. ?

0 Answers

For more Instrumentation Interview Questions Click Here