What is the meaning of Dry contact and Wet Contact related
to to sensors?
- 5 Answers
- 37465 Views
- Emerson, Google, I also Faced
- E-Mail Answers
Answer Posted / welcome4ujd
dry contact is that the contacts are floating. One example
is the COM, NC and NO contacts of the relays. If no voltage
is connected to them, it is called dry contacts.
Volt-free and dry contact mean the same thing. If a control
system supplier offers a dry contact for you to read as a
status bit, then he is offering to close a contact (relay
or contact output) that is nothing more that a stand-alone
set of contacts with no voltage, current, or anything else
impressed across the contact set. It becomes the user's
responsibility to determine how to sense that contact
closure. Usually you do this by putting a voltage on one
side and sensing the voltage on a return line from the
other side of the contact when it closes. Once you apply
voltage to the contacts, it becomes a wet contact.
You "wet" the contact with a sensible voltage level.
.
| Is This Answer Correct ? | 86 Yes | 7 No |
Post New Answer View All Answers
We Have Two Field bus Pressure Transmitters of Different Sensor Range (I.E One is of Lower range and Another is of Higher Range).Is same Process Line. My Question is Can i provide Saturation Limit to my field Bus Transmitter as We can provide Saturation current limit to HART Instruments. As During Low Pressure Both Working OK ,But During High Pressure, transmitter with Lower sensor range Goes to Fault mode as Beyond its Sensor Limit it can Measure, So may I provide Saturation point Some where to Suppress This Fault during High Pressure.
what is dc moter.
what is exact time to study dcs and plc cources
what is interface level measurement.who can calibrate interface level measurement transmitter online
all types of liquid analyzer principle with drawing?
what are the steps I have to deal with?
What is the use of double seated valve?
What are de-saturators?
WHAT IS TMXT IN TEMPERATURE FOUNDATION FIELDBUS.
How can i copy program (parameter) from mm440 (V.F.D.) by using BOP?
I WANT SECURITY PAPER MILL, HOSHANGABAD TEST PAPER.KINDLY SEND TO MY MAIL ID
What is the difference between mmwc and mmwg?
, Instrument Index, P&ID review, I/O schedule, datasheet, DCS / Analyzers specifications, loop diagrams, hook-up drawings.
find the kp ki kd from the transper function G(S)=29.44s+04707/1.5349s2+s
HOW TO CALCULATE ACCURACY OF AN INSTRUMENT. WHICH IS COMPITABLE FOR USE.
