Siemens 6ES7492-1CL00-0AA0 Automation Connection Component — Legacy Replacement. Siemens 6ES7492-1CL00-0AA0 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 connector for signal modules, for crimp contacts, 48-pole. The verified manufacturer lifecycle record is PM400: Legacy lifecycle record.