Siemens 6ES7400-1JA00-0AA0 Industrial Automation Module — Legacy Replacement. Siemens 6ES7400-1JA00-0AA0 is the exact manufacturer order number for a industrial automation module in the SIMATIC S7-400 portfolio. Siemens describes this exact reference as: SIMATIC S7-400, UR2 RACK, CENTRALIZED AND DISTRIBUTED WITH 9 SLOTS. The verified manufacturer lifecycle record is PM500:Discontinued Product or end of PLM & Support.