Siemens 6ES7407-0KR02-0AA1 PS 407 20A Power Supply
Siemens 6ES7407-0KR02-0AA1 PS 407 20A Power Supply
Manufacturer: Siemens
Product No.: 6ES7407-0KR02-0AA1
Condition:1000 in stock
Product Type: Power Supplies
Product Origin: 4019169006149
Payment: T/T, Western Union
Weight: 1000g
Shipping port: Xiamen
Warranty: 12 months
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Siemens 6ES7407-0KR02-0AA1 PS 407 Power Supply
20A High-Performance Power Supply for S7-400 PLC Systems
The Siemens 6ES7407-0KR02-0AA1 is a robust 20-ampere power supply module designed for demanding SIMATIC S7-400 automation systems. This PS 407 unit delivers reliable 5V DC and 24V DC power distribution to support fully-loaded racks with high I/O density and communication processors.
💪 Why 20A Power Capacity Matters
Undersized power supplies are a leading cause of PLC system failures. The PS 407 20A eliminates power-related issues:
- ✅ Full Rack Support – Powers up to 18 modules in UR2/ER2 racks without voltage drop
- ✅ Future-Proof Expansion – 20A capacity accommodates system growth
- ✅ Redundancy Ready – Supports dual power supply configurations for H-systems
- ✅ Wide Input Range – 120-230V AC auto-sensing for global deployment
- ✅ Diagnostic LEDs – Real-time status monitoring for proactive maintenance
📋 Technical Specifications
| Order Number | 6ES7407-0KR02-0AA1 |
| Product Designation | PS 407 20A Power Supply |
| System Compatibility | SIMATIC S7-400 (all racks) |
| Input Voltage | 120-230V AC (auto-sensing) |
| Input Frequency | 47-63 Hz |
| Input Current | Max. 4A @ 120V AC, 2A @ 230V AC |
| Output 5V DC | 20A (100W max) |
| Output 24V DC | 5A (120W max) |
| Total Power | 220W combined (5V + 24V) |
| Efficiency | Typ. 85% at full load |
| Inrush Current | Max. 20A @ 230V AC (12ms) |
| Hold-Up Time | Min. 20ms @ 230V AC |
| Overload Protection | Electronic current limiting + thermal shutdown |
| Short Circuit Protection | Auto-recovery after fault cleared |
| Operating Temp | 0°C to +60°C (horizontal mounting) 0°C to +40°C (vertical mounting) |
| Storage Temp | -40°C to +70°C |
| Humidity | 5% to 95% RH (non-condensing) |
| MTBF | >300,000 hours @ 40°C |
| Certifications | CE, UL 508, cULus, FM, ATEX Zone 2 |
| Dimensions (W×H×D) | 50mm × 290mm × 219mm |
| Weight | Approx. 1.2 kg |
| Warranty | 24 months (manufacturer warranty) |
⚡ Power Budget Calculator
How to Size Your Power Supply
Calculate total current consumption of all modules in your rack:
| Module Type | Typical 5V Current | Typical 24V Current |
|---|---|---|
| CPU 412-5H | 1.5A | 0.1A |
| CPU 414-3 | 1.8A | 0.1A |
| CPU 416-3 | 2.0A | 0.15A |
| Digital I/O (SM 421/422) | 0.3A | 0.05A |
| Analog I/O (SM 431/432) | 0.5A | 0.1A |
| Communication (CP 443) | 0.8A | 0.1A |
| Interface Module (IM 460) | 0.4A | 0.05A |
Example Configuration:
- 1× CPU 414-3: 1.8A @ 5V
- 8× Digital I/O: 8 × 0.3A = 2.4A @ 5V
- 4× Analog I/O: 4 × 0.5A = 2.0A @ 5V
- 2× CP 443: 2 × 0.8A = 1.6A @ 5V
- Total: 7.8A @ 5V (39% of 20A capacity - ✅ Safe margin)
💡 Rule of Thumb: Keep total consumption below 80% of rated capacity (16A for this PS 407 20A) to ensure reliability and allow for future expansion.
📊 PS 407 Power Supply Comparison
| Model | Order Number | 5V Output | 24V Output | Best For |
|---|---|---|---|---|
| PS 407 5A | 6ES7407-0KA02-0AA0 | 5A | 2A | Small systems (up to 6 modules) |
| PS 407 10A | 6ES7407-0KR02-0AA0 | 10A | 3A | Medium systems (up to 12 modules) |
| PS 407 20A (This Product) | 6ES7407-0KR02-0AA1 | 20A | 5A | Large systems (up to 18 modules) |
Upgrade Path: If you're currently using PS 407 10A and experiencing voltage drops or planning expansion, upgrade to this 20A model for double the capacity.
🛠️ Installation & Commissioning
Mounting Position
- Install in Slot 1 of S7-400 rack (leftmost position)
- For redundant configurations, install second PS in Slot 2
- Ensure proper ventilation (50mm clearance above/below)
Wiring Procedure
-
AC Input Connection
- Connect L (Line), N (Neutral), PE (Ground) to terminal block
- Use minimum 1.5mm² wire (AWG 14) for AC input
- Tighten terminals to 0.8-1.2 Nm torque
-
Grounding
- Connect PE terminal to cabinet ground rail
- Use minimum 6mm² copper wire for grounding
- Ensure low-impedance ground path (<0.1Ω)
-
Power-Up Sequence
- Verify AC input voltage with multimeter
- Switch on AC power
- Check green PWR LED (indicates 5V output OK)
- Verify 24V LED (indicates 24V output OK)
- Monitor DC OK LED (backplane power distribution OK)
LED Diagnostics
| LED | Status | Meaning |
|---|---|---|
| PWR (Green) | ON | 5V output normal |
| PWR (Green) | OFF | 5V output failure or AC input missing |
| 24V (Green) | ON | 24V output normal |
| 24V (Green) | OFF | 24V output failure or overload |
| DC OK (Green) | ON | Backplane power distribution OK |
| DC OK (Green) | OFF | Backplane fault or module overload |
| SF (Red) | ON | System fault (check CPU diagnostics) |
🏭 Industry Applications
Oil & Gas Processing
Power redundant S7-400 H-systems in offshore platforms and pipeline control stations. Dual PS 407 20A modules ensure zero downtime during power supply failures.
Power Generation
Support fully-loaded UR2 racks with 18 modules for turbine control, boiler management, and grid synchronization in coal, gas, and nuclear plants.
Automotive Manufacturing
Drive high-density I/O configurations for body-in-white welding lines and paint shop control systems with deterministic power delivery.
Chemical Processing
Provide stable power for batch control systems with multiple analog I/O modules and communication processors in hazardous area installations.
🔄 Redundant Power Supply Configuration
H-System Redundancy Setup
For mission-critical applications, deploy dual PS 407 20A modules:
- Install first PS 407 in Slot 1
- Install second PS 407 in Slot 2
- Connect both to separate AC circuits (different breakers)
- System automatically load-shares between both supplies
- If one PS fails, the other takes full load without interruption
Benefits:
- ✅ Zero downtime during PS failure or maintenance
- ✅ Load sharing extends MTBF of both modules
- ✅ Hot-swap capability (replace failed PS without shutdown)
🔧 Troubleshooting Guide
| Problem | Possible Cause | Solution |
|---|---|---|
| PWR LED off | No AC input or fuse blown | Check AC voltage, verify circuit breaker |
| 24V LED off | 24V overload or short circuit | Disconnect 24V loads, check for shorts |
| DC OK LED off | Backplane overload | Calculate module consumption, upgrade to 20A PS |
| Intermittent resets | Insufficient hold-up time | Check AC input quality, add UPS if needed |
| Overheating | Poor ventilation | Ensure 50mm clearance, check cabinet fans |
🛡️ Authenticity Guarantee
⚠️ Counterfeit Power Supply Risks
Non-genuine power supplies can cause catastrophic failures:
- 🔥 Overheating and fire hazards from inferior components
- ⚡ Voltage instability causing CPU crashes and data corruption
- 💥 Lack of overload protection damaging expensive modules
- 🚫 Voided Siemens warranty on entire system
- ⚖️ Regulatory non-compliance (UL, CE, ATEX)
✅ Industrial Control Hub Guarantee
- 🔒 100% Genuine Siemens – Factory-sealed packaging with holographic labels
- 📜 Full Traceability – Serial numbers and manufacturing dates on every unit
- 🌍 Authorized Distributor – Verify our credentials at Siemens Industry Mall
- 🛡️ 24-Month Warranty – Manufacturer warranty honored globally
- 📦 ESD Protection – Anti-static packaging prevents component damage
- 📞 Technical Support – Pre-sales power budget consultation
📦 Package Contents
- 1× Siemens 6ES7407-0KR02-0AA1 PS 407 20A power supply
- AC input terminal block (pre-installed)
- Mounting hardware for S7-400 rack
- Product documentation and certificate of conformity
🤝 Technical Support
- 📧 Power Budget Consultation – Email us your module list for sizing recommendations
- 📚 Documentation Library – Access Siemens manuals, wiring diagrams, and datasheets
- 🎓 Training Resources – Power supply installation and troubleshooting guides
- 🔄 30-Day Returns – Hassle-free returns if unused and in original packaging
❓ FAQ
Q: Can I use this PS with S7-300 systems?
A: No, this is exclusively for S7-400. S7-300 uses PS 307 series power supplies.
Q: What's the difference between 6ES7407-0KR02-0AA0 and 6ES7407-0KR02-0AA1?
A: The AA1 version is the updated model with improved efficiency and extended MTBF. Functionally identical.
Q: Can I hot-swap this power supply?
A: Yes, in redundant configurations with two PS modules. Never hot-swap a single power supply.
Q: Do I need a 20A PS for a small system with 6 modules?
A: No, PS 407 5A or 10A is sufficient. Choose 20A if you plan to expand or want maximum headroom.
Q: Can I use 120V AC input in a 230V region?
A: Yes, the PS auto-senses input voltage (120-230V AC). No manual switching required.
Product Description
Siemens 6ES7407-0KR02-0AA1 PS 407 Power Supply
20A High-Performance Power Supply for S7-400 PLC Systems
The Siemens 6ES7407-0KR02-0AA1 is a robust 20-ampere power supply module designed for demanding SIMATIC S7-400 automation systems. This PS 407 unit delivers reliable 5V DC and 24V DC power distribution to support fully-loaded racks with high I/O density and communication processors.
💪 Why 20A Power Capacity Matters
Undersized power supplies are a leading cause of PLC system failures. The PS 407 20A eliminates power-related issues:
- ✅ Full Rack Support – Powers up to 18 modules in UR2/ER2 racks without voltage drop
- ✅ Future-Proof Expansion – 20A capacity accommodates system growth
- ✅ Redundancy Ready – Supports dual power supply configurations for H-systems
- ✅ Wide Input Range – 120-230V AC auto-sensing for global deployment
- ✅ Diagnostic LEDs – Real-time status monitoring for proactive maintenance
📋 Technical Specifications
| Order Number | 6ES7407-0KR02-0AA1 |
| Product Designation | PS 407 20A Power Supply |
| System Compatibility | SIMATIC S7-400 (all racks) |
| Input Voltage | 120-230V AC (auto-sensing) |
| Input Frequency | 47-63 Hz |
| Input Current | Max. 4A @ 120V AC, 2A @ 230V AC |
| Output 5V DC | 20A (100W max) |
| Output 24V DC | 5A (120W max) |
| Total Power | 220W combined (5V + 24V) |
| Efficiency | Typ. 85% at full load |
| Inrush Current | Max. 20A @ 230V AC (12ms) |
| Hold-Up Time | Min. 20ms @ 230V AC |
| Overload Protection | Electronic current limiting + thermal shutdown |
| Short Circuit Protection | Auto-recovery after fault cleared |
| Operating Temp | 0°C to +60°C (horizontal mounting) 0°C to +40°C (vertical mounting) |
| Storage Temp | -40°C to +70°C |
| Humidity | 5% to 95% RH (non-condensing) |
| MTBF | >300,000 hours @ 40°C |
| Certifications | CE, UL 508, cULus, FM, ATEX Zone 2 |
| Dimensions (W×H×D) | 50mm × 290mm × 219mm |
| Weight | Approx. 1.2 kg |
| Warranty | 24 months (manufacturer warranty) |
⚡ Power Budget Calculator
How to Size Your Power Supply
Calculate total current consumption of all modules in your rack:
| Module Type | Typical 5V Current | Typical 24V Current |
|---|---|---|
| CPU 412-5H | 1.5A | 0.1A |
| CPU 414-3 | 1.8A | 0.1A |
| CPU 416-3 | 2.0A | 0.15A |
| Digital I/O (SM 421/422) | 0.3A | 0.05A |
| Analog I/O (SM 431/432) | 0.5A | 0.1A |
| Communication (CP 443) | 0.8A | 0.1A |
| Interface Module (IM 460) | 0.4A | 0.05A |
Example Configuration:
- 1× CPU 414-3: 1.8A @ 5V
- 8× Digital I/O: 8 × 0.3A = 2.4A @ 5V
- 4× Analog I/O: 4 × 0.5A = 2.0A @ 5V
- 2× CP 443: 2 × 0.8A = 1.6A @ 5V
- Total: 7.8A @ 5V (39% of 20A capacity - ✅ Safe margin)
💡 Rule of Thumb: Keep total consumption below 80% of rated capacity (16A for this PS 407 20A) to ensure reliability and allow for future expansion.
📊 PS 407 Power Supply Comparison
| Model | Order Number | 5V Output | 24V Output | Best For |
|---|---|---|---|---|
| PS 407 5A | 6ES7407-0KA02-0AA0 | 5A | 2A | Small systems (up to 6 modules) |
| PS 407 10A | 6ES7407-0KR02-0AA0 | 10A | 3A | Medium systems (up to 12 modules) |
| PS 407 20A (This Product) | 6ES7407-0KR02-0AA1 | 20A | 5A | Large systems (up to 18 modules) |
Upgrade Path: If you're currently using PS 407 10A and experiencing voltage drops or planning expansion, upgrade to this 20A model for double the capacity.
🛠️ Installation & Commissioning
Mounting Position
- Install in Slot 1 of S7-400 rack (leftmost position)
- For redundant configurations, install second PS in Slot 2
- Ensure proper ventilation (50mm clearance above/below)
Wiring Procedure
-
AC Input Connection
- Connect L (Line), N (Neutral), PE (Ground) to terminal block
- Use minimum 1.5mm² wire (AWG 14) for AC input
- Tighten terminals to 0.8-1.2 Nm torque
-
Grounding
- Connect PE terminal to cabinet ground rail
- Use minimum 6mm² copper wire for grounding
- Ensure low-impedance ground path (<0.1Ω)
-
Power-Up Sequence
- Verify AC input voltage with multimeter
- Switch on AC power
- Check green PWR LED (indicates 5V output OK)
- Verify 24V LED (indicates 24V output OK)
- Monitor DC OK LED (backplane power distribution OK)
LED Diagnostics
| LED | Status | Meaning |
|---|---|---|
| PWR (Green) | ON | 5V output normal |
| PWR (Green) | OFF | 5V output failure or AC input missing |
| 24V (Green) | ON | 24V output normal |
| 24V (Green) | OFF | 24V output failure or overload |
| DC OK (Green) | ON | Backplane power distribution OK |
| DC OK (Green) | OFF | Backplane fault or module overload |
| SF (Red) | ON | System fault (check CPU diagnostics) |
🏭 Industry Applications
Oil & Gas Processing
Power redundant S7-400 H-systems in offshore platforms and pipeline control stations. Dual PS 407 20A modules ensure zero downtime during power supply failures.
Power Generation
Support fully-loaded UR2 racks with 18 modules for turbine control, boiler management, and grid synchronization in coal, gas, and nuclear plants.
Automotive Manufacturing
Drive high-density I/O configurations for body-in-white welding lines and paint shop control systems with deterministic power delivery.
Chemical Processing
Provide stable power for batch control systems with multiple analog I/O modules and communication processors in hazardous area installations.
🔄 Redundant Power Supply Configuration
H-System Redundancy Setup
For mission-critical applications, deploy dual PS 407 20A modules:
- Install first PS 407 in Slot 1
- Install second PS 407 in Slot 2
- Connect both to separate AC circuits (different breakers)
- System automatically load-shares between both supplies
- If one PS fails, the other takes full load without interruption
Benefits:
- ✅ Zero downtime during PS failure or maintenance
- ✅ Load sharing extends MTBF of both modules
- ✅ Hot-swap capability (replace failed PS without shutdown)
🔧 Troubleshooting Guide
| Problem | Possible Cause | Solution |
|---|---|---|
| PWR LED off | No AC input or fuse blown | Check AC voltage, verify circuit breaker |
| 24V LED off | 24V overload or short circuit | Disconnect 24V loads, check for shorts |
| DC OK LED off | Backplane overload | Calculate module consumption, upgrade to 20A PS |
| Intermittent resets | Insufficient hold-up time | Check AC input quality, add UPS if needed |
| Overheating | Poor ventilation | Ensure 50mm clearance, check cabinet fans |
🛡️ Authenticity Guarantee
⚠️ Counterfeit Power Supply Risks
Non-genuine power supplies can cause catastrophic failures:
- 🔥 Overheating and fire hazards from inferior components
- ⚡ Voltage instability causing CPU crashes and data corruption
- 💥 Lack of overload protection damaging expensive modules
- 🚫 Voided Siemens warranty on entire system
- ⚖️ Regulatory non-compliance (UL, CE, ATEX)
✅ Industrial Control Hub Guarantee
- 🔒 100% Genuine Siemens – Factory-sealed packaging with holographic labels
- 📜 Full Traceability – Serial numbers and manufacturing dates on every unit
- 🌍 Authorized Distributor – Verify our credentials at Siemens Industry Mall
- 🛡️ 24-Month Warranty – Manufacturer warranty honored globally
- 📦 ESD Protection – Anti-static packaging prevents component damage
- 📞 Technical Support – Pre-sales power budget consultation
📦 Package Contents
- 1× Siemens 6ES7407-0KR02-0AA1 PS 407 20A power supply
- AC input terminal block (pre-installed)
- Mounting hardware for S7-400 rack
- Product documentation and certificate of conformity
🤝 Technical Support
- 📧 Power Budget Consultation – Email us your module list for sizing recommendations
- 📚 Documentation Library – Access Siemens manuals, wiring diagrams, and datasheets
- 🎓 Training Resources – Power supply installation and troubleshooting guides
- 🔄 30-Day Returns – Hassle-free returns if unused and in original packaging
❓ FAQ
Q: Can I use this PS with S7-300 systems?
A: No, this is exclusively for S7-400. S7-300 uses PS 307 series power supplies.
Q: What's the difference between 6ES7407-0KR02-0AA0 and 6ES7407-0KR02-0AA1?
A: The AA1 version is the updated model with improved efficiency and extended MTBF. Functionally identical.
Q: Can I hot-swap this power supply?
A: Yes, in redundant configurations with two PS modules. Never hot-swap a single power supply.
Q: Do I need a 20A PS for a small system with 6 modules?
A: No, PS 407 5A or 10A is sufficient. Choose 20A if you plan to expand or want maximum headroom.
Q: Can I use 120V AC input in a 230V region?
A: Yes, the PS auto-senses input voltage (120-230V AC). No manual switching required.