Siemens 6ES7 400-1TA01-0AA0 Simatic S7 18-Slot Module Rack

Siemens 6ES7400-1TA01-0AA0 is the SIMATIC S7-400 UR1 universal rack, a central and distributed 18-slot backplane designed to house CPU, I/O, and interface modules within the S7-400 automation system. The rack provides two backplane busses—an I/O bus and a communication bus—and supports two redundant power supplies in UR1 configurations for increased availability. It measures 482.5 mm wide, 290 mm high, and 27.5 mm deep, with a sheet‑steel mounting rail and a weight of about 4.1 kg. This 18-slot rack is intended for flexible expansion in S7-400 projects, enabling scalable configurations across centralized and distributed architectures.