EL2622 Wiring Diagram
You can get the wiring diagram from Beckhoff Information System or from the module itself. It is troublesome to shut down power and pull the module out just to look at its wiring diagram. I uploaded it here. Hopefully other electricians do not need to go through the same trouble as I did.

Beckhoff EL2622 Wiring

More Information:
Please visit http://www.beckhoff.com for more details.