Interested to Buy Any Domain ? << Click Here >> for more details...
how in the 2 - wire transmitter, 24v supply and the 4ma
signal gets in the same path?
- 1 Answers
- 7636 Views
- Yokogawa, I also Faced
- E-Mail Answers
Answer Posted / carl_ellis
The 2 wire transmitter, DC power supply and the load (some
receiver, an analog input on a
PLC/DCS/Controller/recorder/indicator) are wired in series.
The installer 'gets them in the same path', an electrical
series circuit.
The transmitter uses about 3.5-3.6 mA of current as power to
run its own electronics that excite and/or read the sensor,
interpret the sensor's signal and create a scaled output.
A 2 wire transmitter acts like a variable resistor, or
transistor, in that it regulates its internal resistance so
that the output is scaled 4.0-20.0 mA, proportional to the
process variable it is sensing, with the loop current the
ranging 4-20mA.
The power supply voltage must be high enough to drive 20mA
(21.xmA if upscale failsafe is used/selected) through the
load (the input's resistance, wire resistance, any stray
resistance (terminal block). 24Vdc power supplies are the
most widely used power supplies, but most 2 wire
transmitters can operate with power supplies up to about
32-36 volts DC.
Carl Ellis
Measure First
| Is This Answer Correct ? | 0 Yes | 2 No |
Post New Answer View All Answers
WHY THE DEGREE OF VALVE PLUG AND VALVE SEAT IS SLIGTLY DIFFERENT I CONTROL VALVE TRIM DESIGN
Q- What are the application in which PNP transistor is preferred over NPN ?
Which tank weighing system is better to install (Accuracy point of view) 1) Tank weighing system with 3 load cell or 2) Tank weighing system with 4 Load cell
types of cable..? Use of every types of cable..?
i have done DAE in Instrumentation and Process Control. i have applied for an apprentice training in chemical company after three day my interview will be conduct but i need more information about industrial process control and controller. my e mail is imran_dilsetu@yahoo.com please tell me interview question relative to instrumentation ?
What is ultrasonic flowmeter?
how to relay switch sense the fault?
How addressable fire systems work? Pl. send details with architect.(Loop), also send details regarding Gas system. Pl. help me.Thanks
what is KV and XV valve
what does it mean an active front end in vfd plz explain it briefly
Why ac supply load cell is used? Can we use the dc supply load cell?
I have 0.75mm sq multicore cable (IS type) , can use instead of same type but 1.5 sq mm cable ? Note : The distance is around about 150 meter.
we are having yokogawa centum cs3000 dcs in our power plant. i need some of the operator guides NOT to appear in HIS0163 AND HIS 0162 but it shoul appear in HIS0164 HOW TO DO IT?
what is scale factor of proximitor & unit of the vibration.
what is the importance of CV in the control valves? how it is calculated?
