http://www.phoenixcontact.com/plclogic
This video shows a brief overview of the complete PLC Logic System, showing how the modules connect to PLC Relays and how easy the drag-and-drop LOGIC+ software is.
PLC Logic is a Smart Relay System that allows users to program PLC Relays to switch and control I/O signals. LOGIC+ is the software used to program the PLC Logic modules.