You are not registered yet. Please click here to register!


 
 
plc storereviewsdownloads
This board is for PLC Related Q&A ONLY. Please DON'T use it for advertising, etc.
 
Try our online PLC Simulator- FREE.  Click here now to try it.

---------->>>>>Get FREE PLC Programming Tips

New Here? Please read this important info!!!


Go Back   PLCS.net - Interactive Q & A > PLCS.net - Interactive Q & A > LIVE PLC Questions And Answers

PLC training tools sale

Reply
 
Thread Tools Display Modes
Old January 12th, 2017, 09:23 AM   #1
gdalianis
Member
Greece

gdalianis is offline
 
Join Date: Jan 2008
Location: Greece
Posts: 17
Problem in reading electric diagram.

I have this control IO port on a machine panle. I know a little of reading electrical diagrams. Could some friend help me about it. I can not understand where the machine can supply current as a source and where it must be supplied from an external source. Is it correct that the port supplies voltage to the inputs with A12 common? Is it also correct that the port must be supplied from an external source at output terminals B1 to B12 in order for the outputs would function properly?
Attached Images
File Type: jpg port io.jpg (64.0 KB, 135 views)
  Reply With Quote
Old January 12th, 2017, 09:39 AM   #2
James Mcquade
Member
United States

James Mcquade is offline
 
Join Date: Oct 2007
Location: Tennessee
Posts: 2,015
Please explain your application better.
what plc is used, I/o card used (assuming plc is used)
is this a sensor, interface bridge?

regards,
james
  Reply With Quote
Old January 12th, 2017, 09:44 AM   #3
geniusintraining
Lifetime Supporting Member + Moderator
United States

geniusintraining is offline
 
geniusintraining's Avatar
 
Join Date: Jun 2005
Location: SC
Posts: 5,056
What does it do?

Looks to me like you can just use dry contacts on the inputs A1-A11

Your outputs would be depending what you are doing with it
__________________
www.PLCCable.com PLC Communication Cables, PLC Trainers, Fluke Meters, MicroLogix, ControlLogix, Siemens, Allen Bradley and more... all your automation needs... ((NEW)) After Market 1784-U2DHP Allen Bradley USB to DH+ and Gateways
  Reply With Quote
Old January 12th, 2017, 09:48 AM   #4
jstolaruk
Member
United States

jstolaruk is offline
 
Join Date: Dec 2004
Location: Detroit, SE Michigan
Posts: 3,051
The outputs are photo-coupled darlington pair transistors and basically provide a current connection to the common. So, for a relay or light, one connection would be to your supply and the other (the common) is connected to the output terminal.
__________________
"You can live to be a hundred if you give up all the things that make you want to live to be a hundred." Woody Allen
  Reply With Quote
Old January 12th, 2017, 04:30 PM   #5
keithkyll
Member
United States

keithkyll is offline
 
Join Date: Jul 2005
Location: Heath, TX
Posts: 1,898
Quote:
Originally Posted by gdalianis View Post
...Is it correct that the port supplies voltage to the inputs with A12 common?
Is it also correct that the port must be supplied from an external source at output terminals B1 to B12 in order for the outputs would function properly?
Yes and Yes.
  Reply With Quote
Old January 12th, 2017, 05:43 PM   #6
danw
Member
United States

danw is offline
 
danw's Avatar
 
Join Date: Oct 2004
Location: midwest, USA
Posts: 2,704
Quote:
Originally Posted by gdalianis View Post
Is it also correct that the port must be supplied from an external source at output terminals B1 to B12 in order for the outputs would function properly?
The voltage is applied to the far side of the relay coil, then the other side of the coil connects to the digital output terminal.
  Reply With Quote
Reply
Jump to Live PLC Question and Answer Forum

Bookmarks


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Topics
Thread Thread Starter Forum Replies Last Post
RSLogix 5000 serial data reading problem. Isaac I.C. LIVE PLC Questions And Answers 3 June 24th, 2016 06:03 PM
Ladder diagram problem... marko23 LIVE PLC Questions And Answers 6 January 11th, 2011 07:08 PM
Siemens SM331 - problem reading analog input Renato LIVE PLC Questions And Answers 0 November 26th, 2007 11:41 PM
Electric forklift scr problem kendrickg LIVE PLC Questions And Answers 7 October 12th, 2007 03:02 PM


All times are GMT -5. The time now is 02:39 AM.


.