Siemens 6ES7412-1XJ05-0AB0 CPU 412-3H S7-400
Siemens 6ES7412-1XJ05-0AB0 CPU 412-3H S7-400
Manufacturer: Siemens
Product No.: 6ES7412-1XJ05-0AB0
Condition:1000 in stock
Product Type: PLC CPUs
Product Origin: 4019169151252
Payment: T/T, Western Union
Weight: 1000g
Shipping port: Xiamen
Warranty: 12 months
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Siemens 6ES7412-1XJ05-0AB0 CPU 412-3H
High-Availability Redundant CPU for SIMATIC S7-400H Fault-Tolerant Systems
The Siemens 6ES7412-1XJ05-0AB0 is a powerful redundant CPU designed for mission-critical S7-400H systems requiring zero downtime. This CPU 412-3H delivers deterministic control performance with hot-standby redundancy, making it ideal for continuous process industries where system failures are not an option.
🛡️ Why Redundant CPUs Matter
In critical infrastructure—power plants, oil refineries, pharmaceutical production—a single CPU failure can cost millions in downtime and lost production. The CPU 412-3H provides:
- ✅ Hot-Standby Redundancy – Automatic failover in <100ms without process interruption
- ✅ Bumpless Switchover – Seamless transition maintains control loop integrity
- ✅ Online Maintenance – Replace faulty CPU without stopping production
- ✅ Synchronized Operation – Both CPUs execute identical programs in parallel
- ✅ Diagnostic Monitoring – Continuous health checks detect issues before failure
📋 Technical Specifications
| Order Number | 6ES7412-1XJ05-0AB0 |
| CPU Type | CPU 412-3H (Redundant H-System) |
| System Compatibility | SIMATIC S7-400H (fault-tolerant systems) |
| Work Memory | 512 KB (256 KB code + 256 KB data) |
| Load Memory | 8 MB (integrated), expandable to 64 MB with memory card |
| Processing Speed | 0.1 ms per 1000 binary operations |
| I/O Addressing | 8192 digital inputs / 8192 digital outputs |
| Process Image | 8 KB inputs / 8 KB outputs |
| Bit Memory | 8 KB |
| Timers/Counters | 2048 S7 timers / 2048 S7 counters |
| Blocks | 6000 total (OB, FC, FB, DB, SFC, SFB) |
| Communication | MPI, Profibus DP, Ethernet (with CP) |
| Redundancy Type | Hot-standby (1:1 redundancy) |
| Switchover Time | <100 ms (typical) |
| Synchronization | Via fiber optic sync modules |
| Operating Voltage | DC 24V (19.2-28.8V range) |
| Current Consumption | Typ. 1.8A @ 24V DC |
| Power Dissipation | Approx. 18W |
| Operating Temp | 0°C to +60°C (horizontal mounting) |
| Dimensions (W×H×D) | 50mm × 290mm × 219mm |
| Weight | Approx. 850g |
| Certifications | CE, UL, cULus, FM, ATEX, IECEx, SIL 3 (IEC 61508) |
| MTBF | >250,000 hours |
⚡ Performance Benchmarks
| Operation Type | Execution Time |
|---|---|
| Bit operations | 0.01 µs |
| Word operations | 0.02 µs |
| Fixed-point arithmetic (32-bit) | 0.04 µs |
| Floating-point arithmetic | 0.12 µs |
Real-World Performance: Capable of executing 10 million binary operations per second, making it suitable for complex control algorithms and high-speed process control.
🔄 How H-System Redundancy Works
Architecture Overview
- Dual CPUs: Two identical CPU 412-3H modules operate in parallel
- Synchronization: Fiber optic sync modules (6ES7960-1AA04-5AA0) ensure cycle-accurate synchronization
- Shared I/O: Both CPUs access the same I/O modules via redundant communication paths
- Automatic Failover: If primary CPU fails, standby CPU takes over within 100ms
Failover Scenarios
| Failure Type | System Response | Downtime |
|---|---|---|
| CPU hardware fault | Automatic switchover to standby CPU | <100ms |
| Power supply failure | Redundant PS maintains operation | 0ms (seamless) |
| Communication error | Switch to backup comm path | <50ms |
| I/O module fault | Diagnostic alarm, process continues | 0ms (degraded mode) |
🏭 Mission-Critical Applications
Power Generation & Distribution
Control turbine governors, boiler management, and grid synchronization in coal, gas, nuclear, and renewable energy plants. SIL 3 certification ensures compliance with IEC 61508 safety standards.
Oil & Gas Processing
Manage offshore platforms, refineries, and pipeline control systems where unplanned shutdowns risk environmental disasters and multi-million dollar losses.
Chemical & Pharmaceutical
Implement batch control and continuous processes in GMP-certified facilities. FDA 21 CFR Part 11 compliance for electronic records and signatures.
Water & Wastewater Treatment
Ensure 24/7 operation of municipal treatment plants serving millions of residents. Redundancy prevents service interruptions during maintenance.
Steel & Metal Production
Control blast furnaces, rolling mills, and continuous casting where process interruptions cause equipment damage and product quality issues.
📊 CPU 412-3H vs. Alternatives
| Feature | CPU 412-3H (This Product) | CPU 414-3H | CPU 417-4H |
|---|---|---|---|
| Work Memory | 512 KB | 1.4 MB | 30 MB |
| Processing Speed | 0.1 ms/1000 ops | 0.08 ms/1000 ops | 0.02 ms/1000 ops |
| Max I/O Points | 16,384 | 32,768 | 65,536 |
| Max Blocks | 6,000 | 8,000 | 16,000 |
| Redundancy | ✅ Hot-standby | ✅ Hot-standby | ✅ Hot-standby |
| Best For | Medium complexity, cost-sensitive | Large systems, moderate speed | Very large, high-speed systems |
| Typical Price | 💰💰 Medium | 💰💰💰 High | 💰💰💰💰 Very High |
💡 Selection Guide: Choose CPU 412-3H for medium-sized redundant systems (up to 16K I/O points) where cost-effectiveness is important. Upgrade to CPU 414-3H or 417-4H for larger systems or faster processing requirements.
🔧 System Requirements
Mandatory Components
- 2× CPU 412-3H (6ES7412-1XJ05-0AB0) – This product, ordered in pairs
- 2× Sync Modules (6ES7960-1AA04-5AA0) – Fiber optic synchronization
- 2× Power Supplies (PS 407, redundant configuration)
- 1× UR2-H Rack (6ES7400-2JA00-0AA0) – 18-slot segmented rack
- Fiber Optic Cables – For sync module connection (various lengths)
Optional Components
- Memory Card (up to 64 MB for extended program storage)
- Communication Processors (CP 443 for Profinet, Ethernet)
- Redundant I/O modules (ET 200M with redundant interface)
🛠️ Installation & Configuration
Hardware Setup
- Install CPUs – Mount both CPU 412-3H modules in UR2-H rack (Slots 4 and 5)
- Install Sync Modules – Place sync modules adjacent to CPUs
- Connect Fiber Optics – Link sync modules with fiber optic cables (redundant paths)
- Install Power Supplies – Configure redundant PS 407 modules
- Ground System – Ensure proper PE connection for EMC compliance
Software Configuration (STEP 7)
- Create new S7-400H project in STEP 7
- Configure hardware with both CPUs in redundant mode
- Set synchronization parameters (cycle time, update time)
- Download configuration to both CPUs
- Verify synchronization status via diagnostic LEDs
- Test failover by simulating CPU fault
🔍 LED Indicators & Diagnostics
| LED | Color | Meaning |
|---|---|---|
| SF | Red | System fault (hardware or software error) |
| BF | Red | Bus fault (communication error) |
| DC5V | Green | 5V power supply OK |
| RUN | Green | CPU in RUN mode |
| STOP | Yellow | CPU in STOP mode |
| REDF | Red | Redundancy fault (sync error) |
| MSTR | Green | Master CPU (active controller) |
🛡️ Authenticity & Safety
⚠️ Counterfeit CPU Risks
Non-genuine CPUs in safety-critical systems can cause:
- 🔥 Catastrophic failures in power plants or refineries
- ⚡ Unreliable redundancy leading to unplanned shutdowns
- 💥 Safety system failures violating IEC 61508 compliance
- 🚫 Voided insurance and regulatory penalties
- ⚖️ Legal liability for accidents caused by counterfeit components
✅ Industrial Control Hub Guarantee
- 🔒 100% Genuine Siemens – Factory-sealed with holographic labels
- 📜 SIL 3 Certification – Full safety documentation included
- 🌍 Authorized Distributor – Verify at Siemens Industry Mall
- 🛡️ 24-Month Warranty – Global manufacturer warranty
- 📞 Technical Support – Pre-sales consultation and commissioning assistance
📦 Package Contents
- 1× Siemens 6ES7412-1XJ05-0AB0 CPU 412-3H module
- Installation guide and safety documentation
- SIL 3 certificate of conformity
Note: Redundant systems require 2× CPUs, 2× sync modules, and specialized rack. Order complete H-system kit separately.
🤝 Technical Support
- 📧 H-System Design Consultation – Email us your redundancy requirements
- 📚 Documentation Library – STEP 7 configuration manuals, safety manuals
- 🎓 Training Resources – H-system programming and troubleshooting guides
- 🔧 Commissioning Support – Remote assistance for system startup
- 🔄 30-Day Returns – Unused modules in original packaging
❓ FAQ
Q: Can I use a single CPU 412-3H without redundancy?
A: No, CPU 412-3H is designed exclusively for H-systems. For non-redundant applications, use CPU 412-2 (6ES7412-2XK07-0AB0) instead.
Q: What's the difference between CPU 412-3H and CPU 412-2?
A: CPU 412-3H supports hot-standby redundancy (H-system). CPU 412-2 is for standard non-redundant S7-400 systems.
Q: How long does failover take?
A: Typically <100ms from fault detection to standby CPU takeover, ensuring bumpless process control.
Q: Can I mix CPU 412-3H with CPU 414-3H in a redundant pair?
A: No, both CPUs must be identical models with matching firmware versions.
Q: Is this CPU compatible with S7-300 systems?
A: No, CPU 412-3H is exclusively for S7-400H systems. Not compatible with S7-300 or S7-1500.
Q: What programming software do I need?
A: STEP 7 V5.x (Classic) or TIA Portal V13+ with S7-400H license.
Product Description
Siemens 6ES7412-1XJ05-0AB0 CPU 412-3H
High-Availability Redundant CPU for SIMATIC S7-400H Fault-Tolerant Systems
The Siemens 6ES7412-1XJ05-0AB0 is a powerful redundant CPU designed for mission-critical S7-400H systems requiring zero downtime. This CPU 412-3H delivers deterministic control performance with hot-standby redundancy, making it ideal for continuous process industries where system failures are not an option.
🛡️ Why Redundant CPUs Matter
In critical infrastructure—power plants, oil refineries, pharmaceutical production—a single CPU failure can cost millions in downtime and lost production. The CPU 412-3H provides:
- ✅ Hot-Standby Redundancy – Automatic failover in <100ms without process interruption
- ✅ Bumpless Switchover – Seamless transition maintains control loop integrity
- ✅ Online Maintenance – Replace faulty CPU without stopping production
- ✅ Synchronized Operation – Both CPUs execute identical programs in parallel
- ✅ Diagnostic Monitoring – Continuous health checks detect issues before failure
📋 Technical Specifications
| Order Number | 6ES7412-1XJ05-0AB0 |
| CPU Type | CPU 412-3H (Redundant H-System) |
| System Compatibility | SIMATIC S7-400H (fault-tolerant systems) |
| Work Memory | 512 KB (256 KB code + 256 KB data) |
| Load Memory | 8 MB (integrated), expandable to 64 MB with memory card |
| Processing Speed | 0.1 ms per 1000 binary operations |
| I/O Addressing | 8192 digital inputs / 8192 digital outputs |
| Process Image | 8 KB inputs / 8 KB outputs |
| Bit Memory | 8 KB |
| Timers/Counters | 2048 S7 timers / 2048 S7 counters |
| Blocks | 6000 total (OB, FC, FB, DB, SFC, SFB) |
| Communication | MPI, Profibus DP, Ethernet (with CP) |
| Redundancy Type | Hot-standby (1:1 redundancy) |
| Switchover Time | <100 ms (typical) |
| Synchronization | Via fiber optic sync modules |
| Operating Voltage | DC 24V (19.2-28.8V range) |
| Current Consumption | Typ. 1.8A @ 24V DC |
| Power Dissipation | Approx. 18W |
| Operating Temp | 0°C to +60°C (horizontal mounting) |
| Dimensions (W×H×D) | 50mm × 290mm × 219mm |
| Weight | Approx. 850g |
| Certifications | CE, UL, cULus, FM, ATEX, IECEx, SIL 3 (IEC 61508) |
| MTBF | >250,000 hours |
⚡ Performance Benchmarks
| Operation Type | Execution Time |
|---|---|
| Bit operations | 0.01 µs |
| Word operations | 0.02 µs |
| Fixed-point arithmetic (32-bit) | 0.04 µs |
| Floating-point arithmetic | 0.12 µs |
Real-World Performance: Capable of executing 10 million binary operations per second, making it suitable for complex control algorithms and high-speed process control.
🔄 How H-System Redundancy Works
Architecture Overview
- Dual CPUs: Two identical CPU 412-3H modules operate in parallel
- Synchronization: Fiber optic sync modules (6ES7960-1AA04-5AA0) ensure cycle-accurate synchronization
- Shared I/O: Both CPUs access the same I/O modules via redundant communication paths
- Automatic Failover: If primary CPU fails, standby CPU takes over within 100ms
Failover Scenarios
| Failure Type | System Response | Downtime |
|---|---|---|
| CPU hardware fault | Automatic switchover to standby CPU | <100ms |
| Power supply failure | Redundant PS maintains operation | 0ms (seamless) |
| Communication error | Switch to backup comm path | <50ms |
| I/O module fault | Diagnostic alarm, process continues | 0ms (degraded mode) |
🏭 Mission-Critical Applications
Power Generation & Distribution
Control turbine governors, boiler management, and grid synchronization in coal, gas, nuclear, and renewable energy plants. SIL 3 certification ensures compliance with IEC 61508 safety standards.
Oil & Gas Processing
Manage offshore platforms, refineries, and pipeline control systems where unplanned shutdowns risk environmental disasters and multi-million dollar losses.
Chemical & Pharmaceutical
Implement batch control and continuous processes in GMP-certified facilities. FDA 21 CFR Part 11 compliance for electronic records and signatures.
Water & Wastewater Treatment
Ensure 24/7 operation of municipal treatment plants serving millions of residents. Redundancy prevents service interruptions during maintenance.
Steel & Metal Production
Control blast furnaces, rolling mills, and continuous casting where process interruptions cause equipment damage and product quality issues.
📊 CPU 412-3H vs. Alternatives
| Feature | CPU 412-3H (This Product) | CPU 414-3H | CPU 417-4H |
|---|---|---|---|
| Work Memory | 512 KB | 1.4 MB | 30 MB |
| Processing Speed | 0.1 ms/1000 ops | 0.08 ms/1000 ops | 0.02 ms/1000 ops |
| Max I/O Points | 16,384 | 32,768 | 65,536 |
| Max Blocks | 6,000 | 8,000 | 16,000 |
| Redundancy | ✅ Hot-standby | ✅ Hot-standby | ✅ Hot-standby |
| Best For | Medium complexity, cost-sensitive | Large systems, moderate speed | Very large, high-speed systems |
| Typical Price | 💰💰 Medium | 💰💰💰 High | 💰💰💰💰 Very High |
💡 Selection Guide: Choose CPU 412-3H for medium-sized redundant systems (up to 16K I/O points) where cost-effectiveness is important. Upgrade to CPU 414-3H or 417-4H for larger systems or faster processing requirements.
🔧 System Requirements
Mandatory Components
- 2× CPU 412-3H (6ES7412-1XJ05-0AB0) – This product, ordered in pairs
- 2× Sync Modules (6ES7960-1AA04-5AA0) – Fiber optic synchronization
- 2× Power Supplies (PS 407, redundant configuration)
- 1× UR2-H Rack (6ES7400-2JA00-0AA0) – 18-slot segmented rack
- Fiber Optic Cables – For sync module connection (various lengths)
Optional Components
- Memory Card (up to 64 MB for extended program storage)
- Communication Processors (CP 443 for Profinet, Ethernet)
- Redundant I/O modules (ET 200M with redundant interface)
🛠️ Installation & Configuration
Hardware Setup
- Install CPUs – Mount both CPU 412-3H modules in UR2-H rack (Slots 4 and 5)
- Install Sync Modules – Place sync modules adjacent to CPUs
- Connect Fiber Optics – Link sync modules with fiber optic cables (redundant paths)
- Install Power Supplies – Configure redundant PS 407 modules
- Ground System – Ensure proper PE connection for EMC compliance
Software Configuration (STEP 7)
- Create new S7-400H project in STEP 7
- Configure hardware with both CPUs in redundant mode
- Set synchronization parameters (cycle time, update time)
- Download configuration to both CPUs
- Verify synchronization status via diagnostic LEDs
- Test failover by simulating CPU fault
🔍 LED Indicators & Diagnostics
| LED | Color | Meaning |
|---|---|---|
| SF | Red | System fault (hardware or software error) |
| BF | Red | Bus fault (communication error) |
| DC5V | Green | 5V power supply OK |
| RUN | Green | CPU in RUN mode |
| STOP | Yellow | CPU in STOP mode |
| REDF | Red | Redundancy fault (sync error) |
| MSTR | Green | Master CPU (active controller) |
🛡️ Authenticity & Safety
⚠️ Counterfeit CPU Risks
Non-genuine CPUs in safety-critical systems can cause:
- 🔥 Catastrophic failures in power plants or refineries
- ⚡ Unreliable redundancy leading to unplanned shutdowns
- 💥 Safety system failures violating IEC 61508 compliance
- 🚫 Voided insurance and regulatory penalties
- ⚖️ Legal liability for accidents caused by counterfeit components
✅ Industrial Control Hub Guarantee
- 🔒 100% Genuine Siemens – Factory-sealed with holographic labels
- 📜 SIL 3 Certification – Full safety documentation included
- 🌍 Authorized Distributor – Verify at Siemens Industry Mall
- 🛡️ 24-Month Warranty – Global manufacturer warranty
- 📞 Technical Support – Pre-sales consultation and commissioning assistance
📦 Package Contents
- 1× Siemens 6ES7412-1XJ05-0AB0 CPU 412-3H module
- Installation guide and safety documentation
- SIL 3 certificate of conformity
Note: Redundant systems require 2× CPUs, 2× sync modules, and specialized rack. Order complete H-system kit separately.
🤝 Technical Support
- 📧 H-System Design Consultation – Email us your redundancy requirements
- 📚 Documentation Library – STEP 7 configuration manuals, safety manuals
- 🎓 Training Resources – H-system programming and troubleshooting guides
- 🔧 Commissioning Support – Remote assistance for system startup
- 🔄 30-Day Returns – Unused modules in original packaging
❓ FAQ
Q: Can I use a single CPU 412-3H without redundancy?
A: No, CPU 412-3H is designed exclusively for H-systems. For non-redundant applications, use CPU 412-2 (6ES7412-2XK07-0AB0) instead.
Q: What's the difference between CPU 412-3H and CPU 412-2?
A: CPU 412-3H supports hot-standby redundancy (H-system). CPU 412-2 is for standard non-redundant S7-400 systems.
Q: How long does failover take?
A: Typically <100ms from fault detection to standby CPU takeover, ensuring bumpless process control.
Q: Can I mix CPU 412-3H with CPU 414-3H in a redundant pair?
A: No, both CPUs must be identical models with matching firmware versions.
Q: Is this CPU compatible with S7-300 systems?
A: No, CPU 412-3H is exclusively for S7-400H systems. Not compatible with S7-300 or S7-1500.
Q: What programming software do I need?
A: STEP 7 V5.x (Classic) or TIA Portal V13+ with S7-400H license.