TheSchneider Electric TM2DOCKN is an adaptor module designed for Schneider Electric's Modicon M218 logic controller systems . Its primary function is to provide compatibility and enable the connection of both TM2 and TM3 expansion I/O modules to a TM218 PLC, effectively bridging different module families . The module features a ribbon cable for connection to the controller and an expansion connector for attaching the I/O modules