Rack for Harsh Environments — UR2-H XTR
The Siemens 6ES7400-2JA10-0AA1 is a SIMATIC PCS 7-400 UR2-H XTR rack that serves as the backplane for central and distributed S7-400 configurations. It provides 18 slots arranged in two segments of 9 slots each, with space for 2 × 2 redundant power supplies. This is the XTR variant — extended temperature range and conformal coating. The rack is rated for ambient operation from 0 °C to 70 °C, and the conformal coating meets ISA-S71.04 severity levels G1, G2, and G3, protecting against corrosive gases and particulate contamination. For furnace controls, chemical processing, or offshore panels where standard 60 °C gear won't hold, this is the correct backplane. The P bus and communication bus are electrically separated, which matters when you're mixing standard I/O with safety-oriented or high-speed segments — no shared bus noise to chase.
Two redundant power supply slots per segment allow hot-swap PS configurations. Plan for the 2 × 2 layout when sizing the cabinet depth and cable ducting — the power supplies extend beyond the 27.5 mm rack depth.
Certifications and Compliance Documentation
The rack carries approvals for global deployment: CCC (China), CE, UKCA, UL, FM, KC (Korea), EAC (Eurasian), and RCM (Australia/NZ). The full certification set is listed, so cross-border procurement or parallel-import traders can verify jurisdictional acceptance without chasing separate cert documents.