Why we use 250 ohm resistor in series with HART protocol
communication?
Answer Posted / ahmet
If it had'nt been resistor, 24v had been connection in
parallel to HART device. And a constant current. then there
had not been communication.
That is for isolated 24v and HART com.
for communication with trnsmitter and HART.
| Is This Answer Correct ? | 2 Yes | 5 No |
Post New Answer View All Answers
NSV type probe stands for
What is the GK Value in Flowmeter?
What do you know about gail?
key exchanges in wpa,wpa2,tls
Which are all the commonly used Bordon tubes in the pressure gauges. Do any one use ASTM A 312 tubes for this purpose?
what is a vortex flow meter,mass flow meter and electromagnetic flow meter.particular use of this.means in which condition particular meter is used.
In control valve proximity inductive sensor is taken as digital feedback for full open and full close.Normally its volts 24v when the sensor acts the feed back voltage 14v so that our relay not indicating in plc panel . kindly give the solution.
Calibration of controller (pneumatic)
what is the minimum power (P=VI)to produce a spark?
What is super thermocoupal?
What is Alpha & Beta fctors related to Orifice Plate & its relation with flow?
what is moisture probe? What are there types? What is there working principle and how they works? guys this is one of technical question I had ask in interview. If you know its answer please let me know. The interviewers were more interested in microwave moisture probe, so if you find its any link please just forward me on my mail id.avinash1200@gmail.com Thanks in advance.
In VVVF DRIVES VOLTAGE IS ALSO VARY WITH THE FREQUENCY. HOW? WHAT IS THE DIRECT FORMULA RELATING THESE TWO.
please send me the inteview questions in IOCL
There are many type of control cable like pair,core,tried, What are defination each one