Remote I/O ; Distribute I/O ; Local I/O

ect_09

Member

E

Join Date

Jun 2013

Location

hostle

Posts

19

• Sep 20, 2015

• #1

Hello,
what is the difference between Remote I/O ; Distribute I/O ; Local I/O??
can you please define it

Regards.

 

KalleOlsen

Member

K

Join Date

Oct 2008

Location

Norway (moustache area)

Posts

1,782

• Sep 20, 2015

• #2

Homework?

May I ask how long did you Google before you threw in the towel?

Tell us what you think yourself, then we will help.

Kalle

 

ect_09

Member

OP

E

Join Date

Jun 2013

Location

hostle

Posts

19

• Sep 21, 2015

• #3

nope its not home work.
actually i google it . but didnt understand it theory.
i want to understand this.

Ect_09

 

rdrast

Lifetime Supporting Member

Join Date

Apr 2003

Location

South Carolina Lowcountry

Posts

5,544

• Sep 21, 2015

• #4

Local: same rack as processor.
Remote, distributed, external, everything else: not same rack as processor.

 

mk42

Lifetime Supporting Member

M

Join Date

Jun 2013

Location

MI

Posts

3,278

• Sep 21, 2015

• #5

To be confusing, Remote IO (or RIO for short) was also used by Rockwell as the name of one of their distributed IO networks. The term "Remote IO" is often used generically to mean any distributed IO, but it could sometimes specifically mean IO on a RIO network, depending on what system you are using.

 

ect_09

Member

OP

E

Join Date

Jun 2013

Location

hostle

Posts

19

• Sep 21, 2015

• #6

Thanks rdrast for replying
Sir if Remote and distributed I/O are extenal then what is the difference between these two. why they are naming separately???

Thanks

 

Steve Bailey

Lifetime Supporting Member + Moderator

Join Date

Apr 2002

Location

The boondocks of Western Massachusetts USA

Posts

8,589

• Sep 21, 2015

• #7

Sir if Remote and distributed I/O are extenal then what is the difference between these two. why they are naming separately???

Click to expand...

Because different manufacturers chose to use different terms to describe their products.

 

rdrast

Lifetime Supporting Member

Join Date

Apr 2003

Location

South Carolina Lowcountry

Posts

5,544

• Sep 21, 2015

• #8

ect_09 said:

Thanks rdrast for replying
Sir if Remote and distributed I/O are extenal then what is the difference between these two. why they are naming separately???

Thanks

Click to expand...

Why can you call a personal vehicle a car, or an automobile, or a motor vehicle, or a vehicle?

 

tragically1969

Member

T

Join Date

Jun 2007

Location

uk

Posts

1,538

• Sep 21, 2015

• #9

I always use distributed I/O to describe I/O attached to the PLC but in a backplane extension system, remote I/O to mean a dumb I/O island, local on the rack with the CPU on it.

 

just the cowboy

Member

Join Date

Nov 2013

Location

Pa

Posts

264

• Sep 21, 2015

• #10

Back when

I the old days AB remote I/O was a whole rack ( or part of a rack) around 12"x15"x 18-36" located remotly from the PLC. They then came up with Distributed I/O which was a was smaller around 6"x6"x12" I think and worked in the card level of I/O so you could place them all over the machine or system and just wire them up localy and connect with blue hose. Since then as others have said differant names for the same thing.

 

Bit_Bucket_07

Member

Join Date

Feb 2013

Location

Southeast US

Posts

1,875

• Sep 21, 2015

• #11

Local IO - IO in the "local" chassis, which hosts the CPU -- or in nearby additional chassis that are connected in parallel to the local chassis IO bus.

Remote IO - IO in chassis that are not connected to the local IO bus. Remote IO status is transferred to and from the local chassis via a serial interface.

Distributed IO - IO in modules that are not part of a chassis, but are modular units that transfer IO status to and from the local chassis via a serial interface.

NOTE: "Serial interface" may include Ethernet.