Rack for redundant S7-400: 18 slots, two isolated segments
The 6ES7400-2JA10-0AA0 is the SIMATIC S7-400 UR2-H aluminum rack, designed for central and distributed configurations with 18 slots arranged in 2 segments of 9 slots each. The P bus is separated between the two segments, allowing two independent CPU subsystems on the same backplane.
Environmental limits and approvals for global installs
Rated for 0 to 70 °C ambient, this rack fits into unconditioned enclosures or control rooms with moderate HVAC; the extruded aluminum profile handles the thermal load of 18 modules without forced air. Carries UL, FM, CE, UKCA, KC, EAC, RCM, and CCC approvals — one BOM line covers plants shipping to North America, Europe, Korea, Russia, Australia, and China.
Active production — no lifecycle concern
Lifecycle status is active (mature phase), meaning Siemens still manufactures the UR2-H rack and it remains in the standard price book.