Siemens 6ES7400-2JA00-0AA0 SIMATIC S7-400H UR2-H Rack
01Overview
Siemens 6ES7400-2JA00-0AA0 is the UR2-H rack for SIMATIC S7-400H and related S7-400 station architectures. Its backplane is divided into two independent nine-slot segments, giving eighteen module positions in one 19-inch rack. Each segment has its own communication bus and P bus, allowing a complete redundant S7-400H system or two separately engineered station segments to be accommodated in one mechanical assembly.
02Specs
| Manufacturer | Siemens |
|---|---|
| Article Number | 6ES7400-2JA00-0AA0 |
| Product Designation | UR2-H universal rack |
| Automation System | SIMATIC S7-400H / S7-400 |
| Application | Central and distributed configurations |
| Rack Segments | 2 independent segments |
| Slots per Segment | 9 |
| Total Module Slots | 18 |
| Communication Bus | Separate for each segment |
| P Bus | Separate for each segment |
| Operating Temperature | 0 to 60 degrees C |
| Storage and Transport Temperature | 0 to 70 degrees C |
| Commercial Status | Active product |
03Features
Key Functions
- Two electrically separated nine-slot backplane segments provide eighteen positions in a single rack.
- Each segment has an independent communication bus and P bus.
- The rack can accommodate a complete S7-400H redundant system within one subrack.
- The segmented design can also support two separately engineered CPU and I/O groups when the official configuration rules are followed.
- Central and distributed rack use is supported within the documented S7-400 architecture.
- The 19-inch-width format supports structured cabinet integration for high-availability systems.
Product Identity
- Manufacturer: Siemens
- Model: 6ES7400-2JA00-0AA0
- Product Type: SIMATIC S7-400H UR2-H segmented universal rack
- Status: Active product
04Applications
- S7-400H redundant automation stations installed in one UR2-H rack.
- High-availability process-control systems that require separated backplane segments.
- Central or distributed S7-400 configurations with two independent nine-slot groups.
- Modernization or service replacement of an existing UR2-H installation.
- Control cabinets where a complete redundant station must fit in a single 19-inch rack.
- Engineered configurations using separate CPUs and I/O on the two segments.
05Lifecycle
- Siemens identifies the exact UR2-H article as an active product.
- Confirm whether the installed system uses the rack as one redundant H station, two separate stations or an expansion arrangement.
- Document both segment configurations, module positions, synchronization design, interface modules and supplies before exchange.
- Do not bridge or combine the two backplane segments outside the documented S7-400 design.
- After replacement, validate both station halves, redundancy behavior, synchronization, I/O access and diagnostics.
06FAQ
What is Siemens 6ES7400-2JA00-0AA0?
It is the UR2-H segmented rack for S7-400H and engineered S7-400 central or distributed configurations.
How many slots does the rack provide?
It provides two groups of nine slots, for eighteen module positions in total.
Are the two rack segments independent?
Yes. Each segment has its own communication bus and P bus.
Can a complete S7-400H system fit in one rack?
Yes. The UR2-H is designed so both sides of an S7-400H system can be installed in one subrack, subject to the complete Siemens configuration rules.
Is the rack limited to central-station use?
No. Siemens specifies the UR2-H for central and distributed use.
What must be tested after replacement?
Test both segments, every supply and module, H-system synchronization, redundancy switchover, I/O access and diagnostic reporting.
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