SIEMENS 6ES7412-3HJ14-0AB0 CPU 412-3H Central Processing Unit | Replacement, Equivalent & Selection Guide
The SIEMENS 6ES7412-3HJ14-0AB0 is a high-availability Central Processing Unit (CPU 412-3H) designed for the SIMATIC S7-400H fault-tolerant PLC system. It is engineered for redundant automation architectures in process industries where unplanned downtime is not acceptable. At Konmask.com, we supply genuine, tested units and provide expert selection guidance for direct replacements and compatible equivalents.
Technical Specifications
| Parameter | Value |
|---|---|
| Order Number (MPN) | 6ES7412-3HJ14-0AB0 |
| Product Family | SIMATIC S7-400H |
| CPU Type | CPU 412-3H |
| Work Memory | 1.4 MB (700 KB code + 700 KB data) |
| Load Memory | Integrated 1 MB Flash; expandable via MMC |
| Processing Speed (Bit) | 0.1 µs |
| Processing Speed (Word) | 0.1 µs |
| Sync Submodules | 2 × IF 964-DP (H-sync via fiber optic) |
| MPI/DP Interface | 1 × MPI/DP (12 Mbit/s) |
| Power Supply | DC 5 V via backplane bus |
| Operating Temperature | 0 °C to +60 °C |
| Dimensions (W×H×D) | 25 mm × 290 mm × 210 mm |
| Weight | Approx. 2,600 g |
| Firmware Version | V4.x (HJ14 = V4.5+) |
| Certifications | CE, UL, cULus, ATEX (Zone 2) |
Compatible Replacement & Equivalent Models
When the 6ES7412-3HJ14-0AB0 is unavailable or being upgraded, the following models are commonly evaluated:
| Model | Relationship | Key Difference |
|---|---|---|
| 6ES7412-3HJ00-0AB0 | Earlier revision (V1.x) | Lower firmware; not recommended for new projects |
| 6ES7412-3HJ14-0AB0 (same) | Direct replacement | Identical — genuine spare |
| 6ES7414-3EM05-0AB0 (CPU 414-3H) | Upgrade equivalent | Larger work memory (4 MB); higher throughput |
| 6ES7416-3ES06-0AB0 (CPU 416-3H) | High-end upgrade | 16 MB work memory; for complex redundant systems |
| 6ES7412-2XJ05-0AB0 (CPU 412-2) | Non-redundant alternative | Standard S7-400; no H-sync; lower cost |
Note: Always verify firmware compatibility with your existing S7-400H rack, sync modules, and STEP 7 / TIA Portal project version before substituting.
Why Choose the Original Model
- Proven Redundancy: Dual-CPU hot-standby architecture with bumpless switchover (<1 ms) ensures zero process interruption.
- Long-Term Availability: The HJ14 revision is the latest production variant with extended lifecycle support from Siemens.
- Firmware Stability: V4.x firmware resolves known issues in earlier revisions and supports the latest STEP 7 V5.7 / TIA Portal V17+ projects.
- Certified for Hazardous Areas: ATEX Zone 2 certification makes it suitable for oil & gas and chemical plant environments.
Typical Applications
- Oil & gas pipeline control and SCADA systems
- Chemical and petrochemical process automation
- Power generation and utility distribution
- Water treatment and municipal infrastructure
- Pharmaceutical batch processing (FDA 21 CFR Part 11 environments)
- Redundant safety-critical manufacturing lines
System Compatibility
- Rack: SIMATIC S7-400H UR2-H or UR1 (with H-license)
- Sync Modules: 6ES7960-1AA04-0XA0 / 6ES7960-1AB04-0XA0 (fiber optic sync cable required)
- Power Supply: PS 407 (6ES7407-0DA02-0AA0) or PS 405
- Programming Software: STEP 7 V5.5 SP4+, TIA Portal V13 SP2 and above
- Communication: Compatible with PROFIBUS DP, MPI, and Industrial Ethernet via CP modules
Selection Guide
Use this guide to select the right CPU for your S7-400H application:
| Requirement | Recommended Model |
|---|---|
| Standard redundancy, ≤1.4 MB work memory | 6ES7412-3HJ14-0AB0 ✓ This product |
| Higher throughput, ≤4 MB work memory | 6ES7414-3EM05-0AB0 (CPU 414-3H) |
| Maximum performance, ≤16 MB work memory | 6ES7416-3ES06-0AB0 (CPU 416-3H) |
| Non-redundant, cost-sensitive project | 6ES7412-2XJ05-0AB0 (CPU 412-2) |
| Migration to TIA Portal / S7-1500H | 6ES7511-2HK03-0AB0 (CPU 1511H-1 PN) |
Quality Assurance & Sourcing
- Genuine Parts Only: All units sourced from authorized Siemens distribution channels or verified industrial surplus with full traceability.
- Pre-Shipment Testing: Each CPU is powered-on tested and firmware version verified before dispatch.
- Packaging: ESD-safe anti-static packaging with original Siemens labeling and serial number intact.
- Warranty: 12-month warranty against manufacturing defects; DOA replacement within 7 business days.
How to Order
- Confirm your current CPU order number and firmware version (visible on the module label).
- Verify rack type (UR2-H or UR1) and sync module part numbers.
- Add 6ES7412-3HJ14-0AB0 to cart or contact us for bulk/project pricing.
- Provide your project details for compatibility pre-check — free of charge.
📧 support@konmask.com | 📞 +0086 19859288691
Replacement & Compatibility FAQ
Q: Can I replace 6ES7412-3HJ14-0AB0 with an earlier revision like HJ00?
A: Not recommended. Earlier revisions have lower firmware and may not support current STEP 7 / TIA Portal project configurations. Always use the latest HJ14 revision.
Q: Is this CPU compatible with S7-400 (non-H) racks?
A: The CPU 412-3H can operate in standard S7-400 racks in simplex mode, but the H-sync interfaces will be unused. For pure non-redundant applications, a standard CPU 412-2 is more cost-effective.
Q: What fiber optic cable is needed for H-sync?
A: Siemens 6ES7960-1AA04-0XA0 (0.5 m) or 6ES7960-1AB04-0XA0 (1 m) sync modules with standard 62.5/125 µm multimode fiber.
Q: Does Konmask.com provide programming or commissioning support?
A: We provide hardware supply and basic compatibility guidance. For on-site commissioning, we recommend engaging a certified Siemens Solution Partner.
Q: What is the lead time for this part?
A: In-stock units ship within 1–3 business days. Out-of-stock orders typically have a 2–4 week lead time. Contact us for real-time availability.
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Original Source: https://Konmask.com
Contact: support@konmask.com | +0086 19859288691
