adccommunitymod (AutomationDirect) asked a question.
Created Date: November 11,2011
Created By: BrianG
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I have installed the receiver and sender and both are powered on. I simply cannot determine which of the remaining wires (black & white) go to the input module (using a DL205-1). With neither wire connected to anything the units work, meaning that it indicates when something breaks the beams. However, as soon as I connect either black or white to the input module both orange alignment LEDs come one. I understand that the receiver unit functions as a normally closed PB-switch (XIO in AB language). When I connect either wire to the input the status light comes on, which is what I would expect. But the units no longer respond.
Created Date: November 11,2011
Created by: bcarlton
The light curtain should be attached to the appropriate safety relay . It is not useful as a safety device without using the safety relay. The PDF shows the correct connections.
Created Date: November 11,2011
Created by: Do-more PE
Bernie is correct. The unit will not function correctly without the appropriate safety relay.
Created Date: November 11,2011
Created by: BrianG
This is not an industrial application (i.e. no safety issues) so I am not using a relay. After doing some more "fiddling " I think I have it. Just need to make a change in my program to confirm.
Created Date: November 11,2011
Created by: BrianG
I give up.
Here is how I have the Contrinex attached:
Brown wire (receiver & sender) *** +24VDC
Blue wire (receiver & sender) *** -(0)
The input is X10.
Common to input module from -(0)
How are the remaining 2 wires connected?
Created Date: November 11,2011
Created by: Do-more PE
The unit will not function correctly without the appropriate safety relay. It is not designed to work with a PLC input.
Created Date: November 14,2011
Created by: a agnone
BrianG like it is said, you need to have the relay unit that goes with the light screen. From the light screen you can use the contacts on the relay unit to feed into the plc inputs. If there is no safety issue, just use the contacts to an input. Just out of curiousity why the light screen if not a safety reason? Are you using it to detect an object or loading, then trigger the plc?
Created Date: November 14,2011
Created by: Bob S BN
I give up.
Here is how I have the Contrinex attached:
Brown wire (receiver & sender) *** +24VDC
Blue wire (receiver & sender) *** -(0)
The input is X10.
Common to input module from -(0)
How are the remaining 2 wires connected?
I would suggest you contact the factory before you spend the bucks on the safety relay.
It could be something as simple as needing both outputs connected to PLC inputs so both light curtain outputs see matching loads to correct the fault,
or maybe they 're doing some pulse or other game with their outputs to their safety relay to verify connection.
I would give them a call, as there are light curtain applications that are not safety related, (bin picking, etc).
Just my $.02,
Created Date: November 14,2011
Created by: andremholmes
If it came from AD then he need the safety relay.
Note: AutomationDirect does not recommend using these light curtains with any device other than our Safety Relay Light Curtain Controllers.
Other companies require this too.
Created Date: November 14,2011
Created by: a agnone
Bob you are on to something. Keyence has light screens you can use without the relay, but the light screen has to see "good " for a few milliseconds, almost like an anti-tie down. Brian, like Bob says, call the company. For instance Keyence gives you the pin outs and how to use a plc for control. But of course it is a safety PLC. In your case you could use a AD plc to do what you what to do.
Created Date: November 14,2011
Created by: BrianG
The light curtain simply detects some one breaking the beams which will then start a counter/timer. This is part of an exhibit that also has a "finish " that will stop the counter/timer. Nothing safety at all. All I need is the input for the PLC. If I do need a basic relay between the light curtain receiver and the input module, I can get a $7 one from Radio Shack----but how do I hook it up? I 've been trying different combinations with the white and black wires from the cables (the outputs according to the manual) and nothing works.
If I don't get an answer from the forum this morning I will call Tech Support.
Thanks,