Siemens 6ES75901AC400AA0 Mounting Rail. Siemens Mounting Rail, For Use With: SIMATIC S7-1500 Series PLC CPU, 155 mm H x 245 mm W x 16 mm D. Additional Description: SIEM-6ES75901AC400AA0 MOUNTING RAIL 245MM (9.6). Catalog Description: SIMATIC s7-1500, mounting rail 245 mm (appr. 9.6 inch) incl. grounding element,integrated din rail for mounting of small components such as clamps, fuses or relays.