Answer / maulik vyas

marshalling panels are used as interface between field
junction box & dcs control panel..

It also isolates the dcs panel from feild control panel..

Answer / kkrameshkumar

Marshalling means grouping of I/Os. Marshalling panel is
placed between the DCS system panel and field instruments.
In marshalling panel grouping of I/Os like Analog Input,
Analog Output, Digital Input, Digital Output and Pulse I/O
are done.From marshalling panel the I/O signals are
communicated to the system CPU/Controllers through
Isolation/Signal conditioners.

In marshalling panel we can easily identify the Input or
Output and easy diagnosis can be done in case of fault
finding.

Answer / rajkumar

in addition to maulik points
3. marshalling cabinets location-- if located exactly will
save much cable cost and easy for maintenance people to
trace out cable routing and fault finding

Answer / muhammad fawad azim

FUNCTIONS:
Signal conditioning, termination, signal isolation, cold
junction compensation, field device power supplies.

Answer / rodney

There is a more practical reason for using a Marshalling Panel which becomes apparent if we imagine a multi-cable coming from the field and being connected directly to the I/O cards of a DCS. Whenever some kind of maintenance/test/check has to be performed just imagine the risk of interfering directly at an I/O card just to open some loop circuit. There would be the risk of touching another entry , loosing some bolt, and many other situations that could jeopardize the whole I/O card for some lack of other space specifically created to allow the proper access for maintenance and testing - the Marshalling Panel. Once the connections between all the I/O cards and a Marshalling Panel are done, tested and identified, no one wil have to deal with the I/O panel again, which means less risk and a proper place to do maintenance and testing, for there will be proper open/close connectors, fuses, isolators and all that the Project specifies.

What is the difference between Analytical instruments and other instruments?

7 Answers   Schenck,

What is the difference between HMI,SCADA and MMI,not abbrevation?

7 Answers   HCL,

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.

0 Answers  

Can Any body tell me about the Contact or Email id of any good Consultancy which help me to find a job in Instrumentation Field in India .I have Six years of Work Experience in the Same field.Please revert me back on shammi_gwalior@yahoo.com ?

0 Answers  

what is pt100 RTD, and does 100 stands for

8 Answers   Tata Power,

what is meant by cold junction compensation. where it is used.

1 Answers   SRACO,

why we use sensing type(NPN)on a vibration monitring system not a (PNP)sensing type

1 Answers  

why dead weight tester called dead weight tester.

5 Answers   QAFCO,

how to use level tranasmitter in closed tank application.?

3 Answers   Dalkia,

PLS TELL ME THE FUNCTION OR PRINCIPLE OF CREEP RELEIF VALVE..

3 Answers  

Identify the electrical variable that is either directly or inferentially used by various instruments to determine the value of a measured variable.

4 Answers  

how to solve temperature error in compressor?

1 Answers