Product Introduction
When building or upgrading a high-availability control system, the Siemens 6ES7400-2JA00-0AA0 SIMATIC S7-400H rack UR2-H provides the robust foundation needed for critical processes. This industrial automation module is designed for central and distributed configurations with two segments of nine slots each, enabling redundant processor architectures. The Siemens 6ES7400-2JA00-0AA0 supports separated communication and P buses, ensuring reliable data exchange in redundant systems.
Technical Specifications Breakdown
The Siemens 6ES7400-2JA00-0AA0 rack offers precise specifications for demanding environments:
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Number of slots: 18 (2 x 9 slots) – this enables flexible module placement for redundant CPU and I/O configurations.
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Ambient temperature operation: 0°C to 60°C – suitable for industrial floor environments.
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Dimensions: Width 482.5 mm, Height 290 mm, Depth 27.5 mm – standard 19-inch rack format.
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Weight: Approx. 4.1 kg – robust yet manageable.
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Approvals: CE, UKCA, UL, FM, RCM, KC, EAC, CCC – ensuring global compliance.
Industry Applications and Upgrade Scenarios
The Siemens 6ES7400-2JA00-0AA0 is ideal for upgrading legacy S7-400 systems to redundant (H) configurations. In a typical upgrade, an existing single-rack system with limited fault tolerance is replaced by this 18-slot rack, allowing users to install two CPUs and achieve seamless failover. Industries such as oil & gas, power generation, and water treatment benefit from the enhanced reliability. For example, a municipal water plant can use the Siemens 6ES7400-2JA00-0AA0 to centralize control while maintaining redundancy, reducing unplanned downtime.
Installation & Setup Guidance
Mount the Siemens 6ES7400-2JA00-0AA0 in a standard 19-inch cabinet using the provided rack hardware. Ensure proper grounding according to Siemens guidelines. The backplane automatically provides separated P bus and communication bus paths; no additional wiring is needed for bus separation. Insert modules into the 9-slot segments as per your redundancy configuration. Secure the rack with all screws and verify ambient temperature stays within 0–60°C for reliable operation.
Compatibility & Integration
The Siemens 6ES7400-2JA00-0AA0 works exclusively with SIMATIC S7-400H series CPUs and I/O modules. It supports the entire S7-400 family for redundant systems. The separated communication bus allows integration with PROFIBUS or Industrial Ethernet via the corresponding interface modules. Ensure all components have the same firmware version for optimal performance. This rack is not compatible with standard S7-400 (non-H) CPUs.
Selection Guide & Purchasing Advice
Before purchasing the Siemens 6ES7400-2JA00-0AA0, verify that your system requires a redundant rack with 18 slots and that your CPUs are H-rated. This rack replaces part number 6ES7400-1JA00-0AA0 in upgrade scenarios. For genuine, tested components, visit PLC Source PRO at ubest101.myshopify.com to confirm stock and lead times. Always order matching backplane and power supply for a complete redundancy setup.