what is the difference between RS 232,RS 485,RS 422, how
they different from each other
Answer Posted / calvin
RS232 -
-- point to point
-- Distance 20m
-- Both Half duplex & full duplex
[half duplex --> Data can only be sent or received at
a time and not both same time]
[Full duplex --> data can be sent or received at the same
time]
-- An unbalanced signal --> represented by a single signal
wire where a voltage level on that one wire is used to
transmit/receive binary 1 and 0
-- min input level +/-3V
-- Very sensitive to noise
RS485
-- Multipoint
-- distance upto 1200m @ 100Kbps
-- only half duplex
-- min input level 200mV
-- less sensitive to noise
Is This Answer Correct ? | 15 Yes | 5 No |
Post New Answer View All Answers
what step is taken for ESD ( emergency shut down) in DCS REPLY to hashimka20009@gmail.com
How oil line flow measured?eplain about instruments used and working principle?
what is the diffrence between pressure safety valve & pressure relief valve....pls
DEAR SIR/MADAM MY NAME IS ARKAPROVA BHATTACHARYYA.I AM A FRESHER INSTRUMENTATION ENGINEER.CAN YOU PLEASE SEND SOME QUESTION PAPERS OF GRADUATE ENGINEER TRAINEE EXAM OF DVC(DAMODAR VALLY CORPORATION).MY EMAIL IDs ARE arka_aec@rediffmail.com.
What are the maximum packet size of: a) HART b) Profibus DP c)Profibus PA d) DeviceNet e) Foundation Fieldbus
Drum level tx with GP4 with zero elevation:7300mmh20 on HP and 8050mmh2o on LP as range but on commissioning the tx readiing is max,Why this reading?
Describe the typical instrumentation used in monitoring the performance of a shell and tube heat exchanger.
Calibration procedure for Electro magnetic Flow meter
What pressure results for a flow transmitter of range 0- 180t/h in the dcs and 0-301mbar in the field using square root extraction. Kindly also suggest formulae for the percentages 0,25,50,75,100?
What is difference between differential pressure & delta pressure?
How is automatic reference junction compensation carried out in temperature recorders?
How to check vortex flow meter is in good condition while we do not having calibration setup?
Why use ball valves on Gas pipelines instead of gate & or globe valves...means basic diffrence or use of these valves..how designers knows this type of valve with rating is required...
What is the purpose of LO Overhead tank in turbines.
where i can get training in INTOOLS and PDMS in Delhi-NCR OR north part of India. please reply with ur ans. at arunsamkaria@ymail.com