what is diffrence between analog card and digital card in
plc.how analog card work,Please explain in detail.Please
send it on abhi_vyas@sify.com
Answer Posted / kulamani meher
digital card used for digital input and digital o/p.digital
i/p means status of allswitches whether it is on or off and
pump rts (ready to start),run conform & trip
indication .digital o/p means pump start ,stop,
local/remote. it deals only binary either on or off (0 or
1).analog card deals with analog i/p & analog o/p means 4to
20 ma.analog i/p means for ex. in case of control valve %
of open & close needed so according to 4 to 20 means 0 to
100% open close .analog o/p means o/p from all
transmiter.for ex . in case of level transmiter 50% level
in tank means o/p is 12ma .4ma-0,8ma-25%,12ma-50%,16ma-
75%,20ma -100%.
Is This Answer Correct ? | 22 Yes | 6 No |
Post New Answer View All Answers
Draw a simple circuit for a well head control panel used to protect the well against fire, leak, blockage, ESD, & controls the operation of one downhole & one surface safety valve. Explain the operation and controls
draw shematic diagram of c/v positioner(smart type)?
Operational amplifiers
Lux meter is the measuring device to measure the lux level of lighting fixture. in industrial sector two types of lighting fixture is being used as street lighting purpose 1. HPSV (Sodium) and 2. HPMV (Mercury). HPMV having white light which is an combination of red, blue and yellow colour, while HPSV haivng Yellow lighting. in HPSV red & blue colour will be absent. during measurement of the lux level of HPSV and HPMV fixture. 1. Lux meter can measure the actual lux level of both fixture? 2. or it will show false reading for HPSV fixture light as it has only yellow light present. please give me answer
A DP transmitter is used to measure the level of an open tank. The drain line of the tank is connected to a control valve, and is configured as, if the level of the tank is 90% the valve should get open 10%. And if the tank level is 10%, the valve should get open 90%. Draw wiring diagram and explain how to configure DP transmitter and control valve using HART communicator. If the span error at output is 1%, what will be the %opening of the control valve at 60% level of the tank?
WHAT IS TMXT IN TEMPERATURE FOUNDATION FIELDBUS.
Actual using of tube bender to bend 2 opposite 90 deg at correct measurement center to center of tubing.
basic connection and principle of axial shift sensor n differential sensors in tubine describes n draw......
why direct mounted pressure transmitters is always installed with DBB ( double bleed block) valve in process line or top of the tanks ?
What are advantages and disadvantage of the ac supply load cell?
WHAT ARE THE INSTRUMENTAL DIAGRAMSOF VALVES?
why we use impulse line of flow transmitter at 45 deg. angle both side of orifice plate.
which processor is used in dcs.
Sir, I want junior executive, Instrumentation question papaer for IOCL, Plz send to arabinda.ghosh83@gmail.com
is there any digitel grevity meter availaible in the market by which we can measure specific gravity of a battery?