Answer / mastersensor80

Ethernet is the most widely-installed local area network (
LAN) technology. Specified in a standard, IEEE 802.3,
Ethernet was originally developed by Xerox from an earlier
specification called Alohanet (for the Palo Alto Research
Center Aloha network) and then developed further by Xerox,
DEC, and Intel. An Ethernet LAN typically uses coaxial
cable or special grades of twisted pair wires. Ethernet is
also used in wireless LANs. The most commonly installed
Ethernet systems are called 10BASE-T and provide
transmission speeds up to 10 Mbps. Devices are connected to
the cable and compete for access using a Carrier Sense
Multiple Access with Collision Detection (CSMA/CD )
protocol.
Fast Ethernet or 100BASE-T provides transmission speeds up
to 100 megabits per second and is typically used for LAN
backbone systems, supporting workstations with 10BASE-T
cards. Gigabit Ethernet provides an even higher level of
backbone support at 1000 megabits per second (1 gigabit or
1 billion bits per second). 10-Gigabit Ethernet provides up
to 10 billion bits per second.

Ethernet was named by Robert Metcalfe, one of its
developers, for the passive substance called "luminiferous
(light-transmitting) ether" that was once thought to
pervade the universe, carrying light throughout. Ethernet
was so- named to describe the way that cabling, also a
passive medium, could similarly carry data everywhere
throughout the network

Answer / bharani

All three are communication protocols b/n devices or
controlers which uses CIP technology.But these three vary
on physical media, data transfer ,max.node, distance,CRC
etc.

Answer / brijlal gupta

Ethernet is a one type of cummuniation cable,which is
mainly used in DCS system for cummunication purpose.

ether net is used for FCS to HIS cummunication.

Answer / santu dhar

Eathernet is a hub which use to splite one network input in
more output. the number of output is depends on the number
of port.

Why any transmitter signal is 4-20 mA only Why is started from lower range 4 mA and upper range is 20mA.

5 Answers   Edac,

---

steps for installing orifice plate?

0 Answers   Bhushan Power Steel,

---

What is the difference between sdv and bdv ?

1 Answers  

---

Give 2 application of quartz crystal used for process parameter measurement.

1 Answers   ADMA OPCO,

---

how to calculate orifice sizing? and tell me if pipe size bet 50mm t0 200mm then we can use pipe flange??? and above 250mm pipe size should i use D & D/2 Flange? is it right or wrong?

0 Answers  

---

What is the use of double seated valve?

0 Answers  

---

Why only negative 24 vdc supply give in vibration measuring system.

6 Answers  

---

Can anybody tell me which type of question are asked in the interview for the FORMULATION(Pharma) as a instrumentation engineer, & question in building managment system.

0 Answers   Reddy Labs, ScienceWay,

---

what is control valve input and out put

10 Answers   Nirma,

---

Generally in which location ( JB or IO card or DCS) the thermocouple compensation is done.Also where they measure the atmosphere temp ( for compensation) in JB OR DCS panel? How they compensating that atmosphere temp? is any circuit for that ( like in rtd wheatstone bridge)?

3 Answers  

---

what is the function of a diaphragm?

1 Answers  

---

if drum level is low what is interlock? i mean we put interlock to fd fan or id fan ?

4 Answers  

---