Warning notice system. This manual contains notices you have to observe in order to ensure your personal safety, as well as to prevent damage to property. View and Download Siemens SCALANCE X-400 operating instructions manual online. Industrial Ethernet Switches. SCALANCE X-400 switch pdf manual download. This manual contains notices you have to observe in order to ensure your personal safety, Connectors of the power supply (X1) of the SCALANCE X-400 . Operating Instructions for SCALANCE X-400 Industrial Ethernet Switches information on configuration in the separate SCALANCE X-400 Configuration Manual. Manuals and User Guides for Siemens SCALANCE X-400. We have 5 Siemens SCALANCE X-400 manuals available for free PDF download: Configuration Manual, Operating figuration in the separate SCALANCE X-400 Configuration Manual. Validity of the Operating Instructions. These operating instructions are valid for themanual "SCALANCE X-300 and SCALANCE X-400 Industrial Ethernet Switches". 3.2. Network topologies. 3.2.1. Linear structure. Functional description.