Turn modules keying

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Split from About Module Keying.

Hello ktmz;

You can always pull out the coding key part that is on the I/O module base, using  long-nose pliers. You should be able to re-insert it in the front connector in its original position for re-insertion in a new I/O module.

Be careful, the coding mechanisms cannot be removed often, they are delicate and have a tendancy to break.They were not designed for such an operation. If you break one you can still use the front connector on an IO module, but you lose the protection function that the coding mechanism was designed for: impeding the insertion of a friont connector on the wrong type of I/O module during runtime.

Hope this helps,

Daniel Chartier