photo eye delema

BOWRIDER

Member
Join Date
Mar 2003
Location
FLORIDA
Posts
58
Hello guys (and gals)
I have an interesting dilemma, we have a process here that is controlled at one end by one plc and at the other end by another plc. Both are slc 5/04 processors using 1746 IV16 dc source input cards. My delema is I need to somehow take an input from two photo eyes that are currently wired to one of the plcs , and send that same signal to the other plc. How can I (tap into the signal when the inputs utilize separate power supplies?
 
If its not high speed you can use a relay.

Maybee the PH has dual outputs. If not you could use one that has.

To make sure one PLC has the reading you culd use an output of PLC#1 driving an input of PLC#2

You could use a small opto-coupler (directly translated from french must not be the good term).
 
Simple.

Have the photo eye activate a 2 pole KH style relay. wire the two inputs through the two isolated contacts on the relays.

In the case of the power supply for the photo eyes. Another relay will be picked and held by the "primary controller" If that controller goes off line, the relay will drop, and the contacts on the relay will switch the power supply to the other controller.

Mike.
 
Once you do this, chances are you will want to share other signals down the road. I would recommend, hooking up the two 504s and send the send the signal, along with any other you might want to share, back and forth between the two PLCs with DH+.
 

Similar Topics

Good Evening, I am working on a warehouse loading dock setup with 60 docks, trying to do trailer detection with display as to which docks are...
Replies
3
Views
647
Hello, I work for a beverage company that uses a laser coder to print date codes on bottles. We have a problem where occasionally the photo-eye...
Replies
8
Views
2,517
I am presently in Russia, and need to quickly aquire diffuse laser photo eyes from Germany. We used Sick laser eyes in this application at our...
Replies
1
Views
3,537
Wow today i am having a big problem and felling pretty dumb! I am trying to use a banner vs1 photoeye as an imput into my slc 500. You can wire it...
Replies
7
Views
3,113
Hi All, I am trying to achieve the following. Basically there is photo eye that senses if the bag is present or not. I have to use the...
Replies
3
Views
3,178
Back
Top Bottom