Verified configuration
- Two CPUs operate as the H-system pair.
- Four synchronization modules and two fiber cables form the synchronization link.
2 × CPU 412-5HS7
400H1 MB each · 1 × UR2-H
400H1 MB each · 1 × UR2-H
Siemens 2 × CPU 412-5H
Siemens 6ES7400-0HR51-4AB0 SIMATIC S7-400H CPU 412-5H System Bundle
Unassembled redundant H-system bundle built around two CPU 412-5H processors and a UR2-H rack.
Product Overview
6ES7400-0HR51-4AB0 is a SIMATIC S7-400H system bundle for a CPU 412-5H redundant controller. The bundle includes the UR2-H rack, two DC PS 405 power supplies, two CPU 412-5H units and the synchronization hardware.
Four synchronization modules and two one-metre fiber-optic synchronization cables establish the paired CPU link. Four backup batteries are included, while two memory cards must be ordered separately.
The DC power-supply version accepts the documented 24/48/60 V supply class. The bundle is supplied unassembled, so rack population and paired CPU installation remain part of system integration.
SystemS7-400H
CPUs2 × CPU 412-5H
CPU work memory1 MB each
Rack1 × UR2-H
Hardware Specifications
- System
- S7-400H
- CPUs
- 2 × CPU 412-5H
- CPU work memory
- 1 MB each
- Rack
- 1 × UR2-H
- Power supplies
- 2 × PS 405, 10 A
- Supply class
- 24/48/60 V DC
- Sync modules
- 4 × up to 10 m
- Sync cables
- 2 × 1 m fiber optic
- Backup batteries
- 4
- Memory cards
- 2 required separately
Bundle Composition
6ES7400-0HR51-4AB0 functional organization
Primary path
The order number covers a coordinated set rather than one CPU module.
System boundary
Rack, power supplies, CPUs, synchronization parts and batteries are included.
Configuration point
Memory cards remain outside the delivered bundle and must be selected separately.
Redundancy Synchronization Path
Selection boundary
- Both power and synchronization hardware must be installed as a matched system.
Technical Questions
How does 6ES7400-0HR51-4AB0 implement its Bundle Composition function?
The order number covers a coordinated set rather than one CPU module.
Why must Redundancy Synchronization Path be reviewed for 6ES7400-0HR51-4AB0?
Two CPUs operate as the H-system pair.
Which CPU 412-5H bundle architecture arrangement applies to 6ES7400-0HR51-4AB0?
System-bundle relationship; memory cards are not included.
Which System and CPUs values define the CPU 412-5H bundle architecture configuration 6ES7400-0HR51-4AB0?
System: S7-400H; CPUs: 2 × CPU 412-5H.
Before commissioning 6ES7400-0HR51-4AB0, which Bundle Composition check matters most?
Rack, power supplies, CPUs, synchronization parts and batteries are included.
Which identity boundary is documented for 6ES7400-0HR51-4AB0 when reviewing Bundle Composition?
No model-specific replacement or lifecycle statement is used on this page; identify the exact article and system configuration instead of assuming equivalence.
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