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Forum: 70. Control Systems

Fri 15 July 2011, 07:22

Replies: 333

Limit Switches - optical / mechanical / proximity

Views: 342,862

Posted By Tonys

Red, Sorry to cause you sleepless nights! I can...

Red,
Sorry to cause you sleepless nights! I can now see that a parallel wired N/C circuit would not detect a fault if a proxie is triggered. As I understand it, I can use a N/O circuit with proxies...

Forum: 70. Control Systems

Thu 14 July 2011, 03:52

Replies: 333

Limit Switches - optical / mechanical / proximity

Views: 342,862

Posted By Tonys

Red, Thanks for that explanation. It looks like...

Red,
Thanks for that explanation. It looks like I can avoid the complications and extra wiring of relays by using N/C switches in parallel wire directly to the PMDX126.
Once again thanks

Forum: 70. Control Systems

Mon 11 July 2011, 09:36

Replies: 333

Limit Switches - optical / mechanical / proximity

Views: 342,862

Posted By Tonys

Are relays needed?

I have read and re read this thread but still confused as to whether relays are necessary in the proximity circuits.
Red’s post 294 (including Steve Starlings reply) and Pablo’s posts 274-288...

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