Siemens 6ES7400-1JA01-0AA0 Rack 9-Slot Backplane

Siemens 6ES7400-1JA01-0AA0 is a UR2 backplane rack for the SIMATIC S7-400 system, a nine-slot mounting framework that provides mechanical support and a shared backplane bus for up to nine modules in a compact 257.5 mm wide, 290 mm high, and 27.5 mm deep enclosure. This 9-slot rack is designed for central and distributed configurations and can accommodate two redundant power-supply modules that can be plugged in to enhance reliability in automation layouts. It is intended to house S7-400 CPUs, I/O modules, and interface cards, enabling consistent signal routing and power distribution across installed modules within a single cabinet or control panel. The 6ES7400-1JA01-0AA0 designation identifies the UR2, 9-slot variant of Siemens’ S7-400 backplane family, delivering a standardized mounting solution that aligns with Siemens engineering practices and supports mid-size automation architectures where modular expansion and robust bus connectivity are required.