6ES7400-2JA00-0AA0
Siemens Universal Rack 6ES7400-2JA00-0AA0
Siemens
Siemens Universal Rack 6ES7400-2JA00-0AA0
Home > Siemens > SIMATIC S7-400 > Racks > 6ES7400-2JA00-0AA0 Need Siemens 6ES7400-2JA00-0AA0? Universal Rack for SIMATIC S7-400H / S7-400. Supplied…
Specifications
| Brand | Siemens |
|---|---|
| Model Number | 6ES7400-2JA00-0AA0 |
| Official Product Name | SIMATIC S7-400H, UR2-H Rack, 18 Slots |
| Applicable System | SIMATIC S7-400H / S7-400 (high-availability PLC) |
| Product Type | Universal Rack (UR2-H, redundant) |
| Equivalent Standard | Contact us for cross-reference and alternative models |
| Product Status | In Stock |
| Total slots | 18 (2 x 9, isolated segments) |
| Lifecycle status | Active Product |
| Net weight | 4.557 kg |
| Packaging dimensions (L x W x H) | 58.7 x 30.0 x 4.8 cm |
| Degree of protection | IP20 |
| Ambient operating temperature | 0 to +60 °C |
| Bus type | P-Bus and K-Bus (passive backplane) |
| Mounting | Cabinet bolt-on / 19-inch rack |
| Segment isolation | Segment-to-segment isolated (IEC 61131-2) |
| Power supply | Via PS 405 / PS 407 in first slot of each segment |
| Commodity / EAN | 85389099 / 4025515128298 |
| Rack type | UR2-H (Universal Rack 2, High-Availability) |
Product Description
It is purpose-built for high-availability S7-400H systems, allowing two redundant CPUs to run in a single mechanical frame while keeping their bus segments isolated so a fault or maintenance in one segment cannot affect the other. Power is supplied by the PS 405 / PS 407 power supply modules plugged into each segment. The Siemens 6ES7400-2JA00-0AA0 is the SIMATIC S7-400H UR2-H universal rack, a passive mounting backplane split into two electrically isolated 9-slot segments for a total of 18 slots.
Basic Product Information
- Passive backplane with P-Bus and K-Bus; no own power supply, fed by PS 405 / PS 407 modules
- Supports hot-swap module replacement and S7-400H redundant (fault-tolerant) configurations
- 19-inch cabinet bolt-on mounting with segment-to-segment electrical isolation (IEC 61131-2)
- Compatible with all S7-400 CPUs, signal modules, function modules and communication processors
- Split 2 x 9-slot architecture for two isolated redundant controller segments in one frame
Technical Specifications
Version & Model Difference
The 6ES7400-2JA00-0AA0 is the UR2-H (High-Availability) rack, split into two independent 9-slot segments so two redundant S7-400H CPUs can share one frame with isolated backplanes. This differs from the standard UR1 rack (6ES7400-1JA01-0AA0), which is a single 18-slot segment for non-redundant systems where all modules share one bus. For distributed expansion the ER1/ER2 extension racks connect via interface modules.
Application Scenarios
- High-availability process control in chemical, refinery and pharmaceutical plants
- Power generation and water/wastewater treatment requiring 24/7 uptime
- Fault-tolerant automation for automotive and food & beverage production lines
- Redundant controller backbones paired with ET 200M distributed I/O
No. It is a passive backplane. Each segment is powered by the S7-400 power supply module (PS 405 or PS 407) plugged into the first slot of that segment; a fully redundant H-system typically uses one PSU per segment.
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Frequently Asked Questions
What is the difference between a UR2-H and a standard UR1 rack?
The UR1 (6ES7400-1JA01-0AA0) is a single 18-slot segment where all modules share one backplane. The UR2-H (6ES7400-2JA00-0AA0) is split into two isolated 9-slot segments so two redundant S7-400H CPUs can operate in one frame with separate bus signals.
Does the UR2-H rack need its own power supply?
No. It is a passive backplane. Each segment is powered by the S7-400 power supply module (PS 405 or PS 407) plugged into the first slot of that segment; a fully redundant H-system typically uses one PSU per segment.
Can I run a non-redundant S7-400 system in a UR2-H rack?
Physically possible but inefficient: the segments are electrically isolated, so a CPU in segment A cannot reach I/O in segment B via the backplane. For a standard single-controller system the UR1 rack is the correct choice.
Which CPUs and modules fit this rack?
It accepts the full SIMATIC S7-400 family - all S7-400 CPUs, PS 405/407 power supplies, and S7-400 SM/FM/CP modules - across both 9-slot segments.
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