Siemens 6ES7451-3AL00-0AE0 Variable Speed Drive Component — Legacy Replacement. Siemens 6ES7451-3AL00-0AE0 is the exact manufacturer order number for a variable speed drive component in the SIMATIC S7-400 portfolio. Siemens describes this exact reference as: SIMATIC S7-400, positioning module FM 451 for rapid/slow traverse drives, 3 channels incl. configuration package on CD. The verified manufacturer lifecycle record is PM400:Announcement of product phase-out.