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  1. 20-09-2012 #13
    irving2008's Avatar
    Lives in NW London, gateway to A1 & M1, United Kingdom.
    irving2008
    Last Activity: 17-03-2017 Forum Superstar, has done so much to help others, they deserve a medal. Has been a member for 9-10 years. Has a total post count of 2,849. Received thanks 179 times, giving thanks to others 5 times. Referred 6 members to the community.
    An easy way to provide the limit override (non-locking) and start (locking) logic is with a diode:


    Click image for larger version.  Name: interlocks.gif  Views: 700  Size: 19.0 KB  ID: 6929

    An alternative would be to use a seperate contact on Relay 2 to enable Relay 1, but I prefer to keep contacts free for use.

    Click image for larger version.  Name: interlocks2.gif  Views: 588  Size: 19.5 KB  ID: 6930
    Last edited by irving2008; 20-09-2012 at 09:11 AM.
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