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 October 8th, 2017, 07:11 AM   #1
eebads2391
Member
United Kingdom

eebads2391 is offline
 
Join Date: May 2008
Location: Stockport
Posts: 86
Led driver board

Hi ,

Off topic sorry ( but you guys know everything )

I'm looking for a Led driver circuit board

We have a very old mimic board
It has led indicators in the display that are driven by a circuit board

I'm after replacing it ( some of the outputs don't work )

It has no markings on it to indicate who made it

I am not sure yet whether it is 24v or 110v in
But it has led supply voltage terminals as outputs

So I'm looking for a new cėrcuit board
8 channel or 16 channel in
8/16 led out
24v or 110v input

If anyone can point me towards a replacement board


Thanks
Mike
  Reply With Quote
Old October 8th, 2017, 10:00 AM   #2
gclshortt
Member
Canada

gclshortt is offline
 
gclshortt's Avatar
 
Join Date: Dec 2014
Location: Cobourg
Posts: 2,181
https://www.automationdirect.com/adc...ssage_Displays

The above may help you out. You can use discrete inputs to drive different messages. May be an alternative.

Regards,
__________________
Garry
http://www.accautomation.ca
Connect with us on Facebook: facebook.com/accautomation/
  Reply With Quote
Old October 12th, 2017, 11:23 AM   #3
eebads2391
Member
United Kingdom

eebads2391 is offline
 
Join Date: May 2008
Location: Stockport
Posts: 86
Thanks Garry

But It's a very simple circuit board I'm After

8 or 16 connections in 24v or 110v
8 led connections out to drive single LED 's

If anyone has a link to this type of mimic board driver card

Many thanks in advance

Mike

Last edited by eebads2391; October 12th, 2017 at 11:24 AM. Reason: Typo
  Reply With Quote
Old October 12th, 2017, 11:48 AM   #4
keithkyll
Member
United States

keithkyll is online now
 
Join Date: Jul 2005
Location: Heath, TX
Posts: 1,890
Need a bit more info. Can't see why a driver is needed. Maybe they're using optoisolators. Even then, I don't see the need.
If it was 24 Volt, all you need on each LED is a 2.4K resistor. For 120V, a diode and 10K, 2 Watt resistor in series.
Can you post a hi-res photo of PCB that I can zoom in on? Any chip numbers?
  Reply With Quote
Old October 12th, 2017, 12:26 PM   #5
James Mcquade
Member
United States

James Mcquade is offline
 
Join Date: Oct 2007
Location: Tennessee
Posts: 1,995
eebads2391,

older style display boards were bcd based.
this meant for every digit, there were 4 outputs to the display to control what the numbers were.

if your circuit board has a 2 digit display, there would be 8 outputs.
if the circuit board display has 4 digits, there would be 16 outputs.

is this circuit board controlled by a plc or do you input the number you want to display by manipulating a thumbwheel switch and pressing a button?
guessing at the last statement.

james
  Reply With Quote
Old October 12th, 2017, 03:39 PM   #6
eebads2391
Member
United Kingdom

eebads2391 is offline
 
Join Date: May 2008
Location: Stockport
Posts: 86
Cheers guys
I'll get a photo
Yes the only advantage is presumably isolation
It drives single LEDs not an array or display / number LED

The input to the pcb is 8 inputs of either 24v or 110 v
From proximity switches on plant
Thanks

Last edited by eebads2391; October 12th, 2017 at 03:43 PM.
  Reply With Quote
Old October 13th, 2017, 04:16 AM   #7
eebads2391
Member
United Kingdom

eebads2391 is offline
 
Join Date: May 2008
Location: Stockport
Posts: 86
Attached is a photo
Attached Images
File Type: jpg 20171013_095927.jpg (64.4 KB, 31 views)
  Reply With Quote
Old October 13th, 2017, 04:35 AM   #8
keithkyll
Member
United States

keithkyll is online now
 
Join Date: Jul 2005
Location: Heath, TX
Posts: 1,890
Looks like custom boards. Wirewrap at bottom. You may need to service the boards by replacing IC's. Does something plug into the red connector, or is that testpoints?
Post photos/numbers of IC's, and I'll help source replacements.
From top to bottom it looks like diode, resistor array, driver IC, resistor array.
Are LEDs connected to wirewrap wires at bottom of PCB? Assuming that's the output side.
  Reply With Quote
Old October 13th, 2017, 05:09 AM   #9
AustralIan
Member
United Kingdom

AustralIan is offline
 
Join Date: Jan 2013
Location: UK
Posts: 523
Another option is to replace the lamps and cables for 24V/110V versions.
  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
plc to led sign Kataeb LIVE PLC Questions And Answers 10 June 30th, 2015 07:48 AM
How to switch drivers lbeh LIVE PLC Questions And Answers 7 December 11th, 2014 03:11 PM
1747-PIC/AIC Driver on SP3 w/ patch Tim James LIVE PLC Questions And Answers 13 July 20th, 2013 09:25 PM
RSLinx Ethernet/IP driver on a VLAN ccamp LIVE PLC Questions And Answers 2 April 30th, 2013 11:19 AM
Panelview Plus 1000 No Ethernet driver asmaint2 LIVE PLC Questions And Answers 2 February 5th, 2013 09:31 AM


All times are GMT -5. The time now is 09:15 PM.


.