Siemens 6ES7492-2XL00-0AA0 Automation Connection Component — Legacy Replacement. Siemens 6ES7492-2XL00-0AA0 is the exact manufacturer order number for a automation connection component in the SIMATIC S7-400 portfolio. Siemens describes this exact reference as: SIMATIC S7-400, front flap for peripheral connectors 5 units per packing unit. The verified manufacturer lifecycle record is PM400: Legacy lifecycle record.