What is the similarity and what is the difference between relays and PLC?
Answers were Sorted based on User's Feedback
A relay is designed to act on one type of input signal
only. It may have adjustments for a range but can only
perform one function.
A PLC (programmable Logic Controller) can be made to
perform many differnt functions including the functions of
relays. this is done by selecting the type of inputs and
outputs required when buying and then programming to suit
the functions wanted.
Is This Answer Correct ? | 15 Yes | 0 No |
Answer / sujith kumar
A relay is a switch which gets ON/OFF with respective to the input signal of it.It can be NC or NO depending upon the application.
A PLC is a Microcontroller which has a memory and Relay(s) Controller in which a Program(Our Application) is stored and it will analyse our application and send signal to relay(s).
Is This Answer Correct ? | 8 Yes | 0 No |
Answer / karan thadhani
they both are used to close the contacts of contecters .
Is This Answer Correct ? | 16 Yes | 9 No |
What is fault.?
2 Answers AngloGold Ashanti, MNC,
Which fault is caused by lightening and thuderstorm a. Line to line fault b. Single line to ground fault c. Double line to ground fault
how can u say about the line by looking at the tower ? {voltage rating of the line}
what is ten delta ?
Describe the control mechanism of missile launcher???
1 HP = how many Kva
tube light how its working.,?
we the the value of frequency is 50 HZ in DG then why we said the value inductive rectance is zero in DG?
What is the measuring instrument of magnetic flux density?
I have a question, I visit 01 site and face a problem, there is 2.5 ton Air Con working, when air con compressor is running at that time rectifier voltages are increasing upto 290-295 v and rectifier is giving main high alarm (rectifier is APC single phase, before starting compressor rectifier voltages was 230v. when air con is going off rectifier voltages are decreasing smoothly at its actual voltages 230v. Load on Genset phases is this: Red-13.5 amp AC (Air Con load), Yellow-1.7 amp AC (BTS lights etc.) and Blew-4 amp AC (telecom system load), Genset phase to phase and neutral to phase voltages are also ok. These are 10 sites having same system and same rectifier APC brand at every site 02 genset are working but the problem is same at all these 10 sites. What will be the reason behind???
why cont we short earth and N.......?
how to test the ht machines?