Photocell trouble shooting

[xilog]

Hello All,
We are trying to trace down a problem with a machine we have bought. The machine has two sets of photocells to prevent lateral movement of a stage if there is something blocking its travel.
The photocells are connected to a Telemechanique XPS-CEP safety relay, the photocells appear to function properly (i.e. the LEDs on the cells change color when blocked.
Does anyone know how to test the relay.

Thanks

 

[silva.foxx]

These should get you started...

Photocells:
http://docs-europe.electrocomponents.com/webdocs/00c8/0900766b800c8752.pdf

Safety relay: http://www.squared.com/us/products/...29771685256D4E005C9D54/$file/preventatech.htm

 

[xilog]

Thanks Silva,
The info was exactly what I was looking for.

 

[JERA]

If need of more infomation:

http://www.schneider-electric.com/s...trol-library/download/download-documents.page

 

[xilog]

Solution

Hi Guys,
I think I found the problem. The alignment of the photocells was off. I haven't found any info about what the proper alignment should be, but after some trial and error, I was able to get the machine to start.

Thanks