These PLC migration interfaces enable the control level to be exchanged safely. Adjustments or changes to the infrastructure also can be made quickly and easily without having to intervene in the field wiring. The design permits the existing field wiring to remain in place and undisturbed on the front panel adapter and eliminates the need to wire-trace or ring-out. The assembly is a universal conversion/migration system for main legacy PLC systems, enabling users to migrate to any new control system. The solution includes several versions of card adaptors and cable types to accommodate flying leads or prewired field connections.