ip/op modules

[rajputabhijit]

I wanna know about input and output modules of a PLC.Can anyone will provide me the detailed information about the same.

 

[tragically1969]

I wanna know about input and output modules of a PLC.Can anyone will provide me the detailed information about the same.

Care to choose a PLC manufacturer first ?

VIPA art of automation
Unikom-Ug - metering [1]
ABB Utility Communications
Ascom PLC
Ambient Corporation
Amperion Inc
Broadband Horizons
Corinex
Current Technologies
devolo
DS2
Dimat
Dimonoff
EBA PLC
Echelon
EkoPLC[2]
Electronic Intelligent Controls[3]
Fiberbridge
GigaFast
Icosystel Icosystel Italy www.icosystel.it
Ilevo Schneider Electric subsidiary
InovaTech Asia PACific
InovaTech Group InovaTech worldwide
InovaTech EMEA
Intellon
PowerNet Communications
Powerline Publishing
Powerline World
Pancom A.S.
Mitsubishi
Main.net
Nettel
Panasonic
Poem Technology
SIPRO s.r.l. Energy Management, Metering, Home Automation, Integration with Wireless Sensor Networks
Defidev
RFL Electronics
SiConnect
Siemens
SPiDCOM, SPiDCOM a French PLC chipset developer
Sumitomo Electrics
Thomson SA
Watteco developer of the WPC low rate powerline standard
Yamar Electronics Ltd Innovator of DC powerline communication technology for automotive and aviation. [4]
Xeline Ltd
PowerNet Ltd
Delta PLC
​

 

[rdrast]

I wanna know about input and output modules of a PLC.Can anyone will provide me the detailed information about the same.

They are identical. Input modules are installed right-side up. To convert them to outputs, install them upside down. That works for every single PLC on the market as well. Basically, the microprocessor in the controller has a bunch of pins connected to the backplane bus. The left hand side of every one of those busses in the world connect directly to the microprocessors INPUT pins. The right hand side connects to the processors OUTPUT pins.

Modern PLC microprocessors, even those manufactured up to about 15 years ago have auto-sensing circuitry to switch in resistors and voltage limiters so they can handle any input/output voltage from about 3VDC to 480VAC without any problem.

 

[jstolaruk]

That's about as simple an explanation as I've ever seen. Thank you Rdrast for clearing the air on an otherwise foggy topic.

 

[rdrast]

That's about as simple an explanation as I've ever seen. Thank you Rdrast for clearing the air on an otherwise foggy topic.

You are welcome. I was going to get into how analog modules work (by phase shifting the incoming AC power to the power supply until the comparators tripped, indicating that the incoming waveform and the sampled value were identical, then directly interpolating the polar phase of the actual LC Shifting network), but thought that would be too much information in one go.

 

[bernie_carlton]

As implied by the answers you question is much to broad to answer in a serious way. But input and output modules usually come in two types, discrete and analog.

The discrete either accept (input) or switch (output) a single voltage type. For the input either an on or off state is interpreted for the PLC. Similarly the output is either turned fully on or off (leakage being ignored).

The analog accept a varying level (within limits) and present to the PLC program a varying number. In like manner a varied number produced by the PLC program will generate a varying level of voltage/current by a chosen output module.

As 'tragically1969' posted, to have any further details you would have to narrow down you question considerably. Consult with the manufacturer's sites.

 

[shoelesscraig]

They are identical. Input modules are installed right-side up. To convert them to outputs, install them upside down. That works for every single PLC on the market as well. Basically, the microprocessor in the controller has a bunch of pins connected to the backplane bus. The left hand side of every one of those busses in the world connect directly to the microprocessors INPUT pins. The right hand side connects to the processors OUTPUT pins.

Modern PLC microprocessors, even those manufactured up to about 15 years ago have auto-sensing circuitry to switch in resistors and voltage limiters so they can handle any input/output voltage from about 3VDC to 480VAC without any problem.

Hahaha...I love this

 

[Tom Jenkins]

They are identical. Input modules are installed right-side up. To convert them to outputs, install them upside down. That works for every single PLC on the market as well. Basically, the microprocessor in the controller has a bunch of pins connected to the backplane bus. The left hand side of every one of those busses in the world connect directly to the microprocessors INPUT pins. The right hand side connects to the processors OUTPUT pins.

Modern PLC microprocessors, even those manufactured up to about 15 years ago have auto-sensing circuitry to switch in resistors and voltage limiters so they can handle any input/output voltage from about 3VDC to 480VAC without any problem.

Don't you have to compensate for the Coriollis effect if you install the cards below the equator?

 

[gfr]

There are a couple of good e-books on PLCs available on the web at no cost.