Siemens 6ES7412-2EK06-0AB0 CPU 412-2 PLC Module | Replacement, Equivalent & Selection Guide
The Siemens 6ES7412-2EK06-0AB0 is a CPU 412-2 central processing unit for the SIMATIC S7-400 programmable logic controller platform. Designed for mid-range automation tasks, it delivers reliable performance in process control, manufacturing, and infrastructure applications. This page provides full technical specifications, compatible replacement models, and a structured selection guide to help engineers and procurement teams make confident sourcing decisions.
Technical Specifications
- Part Number: 6ES7412-2EK06-0AB0
- Series: SIMATIC S7-400
- CPU Type: CPU 412-2
- Work Memory: 256 KB (expandable via memory card)
- Load Memory: 256 KB integrated + up to 64 MB via memory card
- Processing Speed: 0.3 ms / 1000 instructions (binary)
- Communication Interfaces: 2 × MPI/PROFIBUS DP (integrated)
- Max. I/O Addresses: 8192 bytes input / 8192 bytes output
- Counters / Timers: 2048 / 2048
- Supply Voltage: DC 24 V (via backplane bus)
- Operating Temperature: 0 °C to +60 °C
- Dimensions (W×H×D): 25 mm × 290 mm × 219 mm
- Weight: approx. 760 g
- Country of Origin: Germany
- Firmware: V6.0 (EK06)
Compatible Replacement & Equivalent Models
When the original 6ES7412-2EK06-0AB0 is unavailable or end-of-life, the following models are commonly evaluated as replacements. Always verify firmware compatibility and backplane slot requirements before substitution.
- 6ES7412-2EK07-0AB0 — Successor firmware revision (V7.0); direct form-fit-function replacement in most S7-400 racks
- 6ES7412-2XK07-0AB0 — SIPLUS extreme variant; rated for extended temperature and harsh environments
- 6ES7414-2XK05-0AB0 — CPU 414-2 DP; higher memory and processing capacity for expanded projects
- 6ES7416-2XN05-0AB0 — CPU 416-2; suitable when project complexity exceeds CPU 412 capacity
- 6ES7412-1XJ05-0AB0 — CPU 412-1; single-interface downgrade option for cost-sensitive applications
Note: Cross-compatibility depends on project configuration, STEP 7 / TIA Portal version, and installed firmware. Consult your system integrator before substitution.
Why Choose the Original Model
- Proven field reliability — Widely deployed in process industries, utilities, and discrete manufacturing since its release
- Dual MPI/PROFIBUS DP interfaces — Enables simultaneous HMI communication and distributed I/O without additional CP modules
- Seamless STEP 7 integration — Fully supported in SIMATIC Manager and TIA Portal V13+
- Stable firmware baseline (V6.0) — Ideal for legacy system maintenance where firmware consistency is critical
- Genuine Siemens quality — Manufactured in Germany with full traceability and CE/UL compliance
Typical Applications
- Chemical and petrochemical process control
- Water and wastewater treatment plant automation
- Power generation and distribution switchgear control
- Automotive assembly line sequencing
- Building management and HVAC control systems
- Material handling and conveyor systems
System Compatibility
- Rack: SIMATIC S7-400 UR1, UR2, UR2-H, CR2, CR3 racks
- Power Supply: PS 405 / PS 407 series
- Programming Software: SIMATIC STEP 7 V5.x, TIA Portal V13 SP1 and above
- Communication: MPI, PROFIBUS DP (master/slave), S7 routing
- Memory Card: SIMATIC S7-400 Flash memory card (6ES7952-xxxx series)
- I/O Modules: All standard S7-400 SM, FM, CP modules
Selection Guide
Use the criteria below to determine whether the 6ES7412-2EK06-0AB0 is the right CPU for your application:
- Program size ≤ 256 KB → CPU 412-2 is sufficient; consider 6ES7412-2EK06-0AB0 or EK07 revision
- Program size 256 KB – 4 MB → Upgrade to CPU 414-2 (6ES7414-2XK05-0AB0)
- Program size > 4 MB or high-speed processing required → Consider CPU 416 or CPU 417 series
- Dual PROFIBUS DP networks required → CPU 412-2 covers this natively; no additional CP needed
- Redundant / fault-tolerant system → Evaluate CPU 412H or S7-400H redundancy system
- Harsh environment (vibration, wide temperature) → Select SIPLUS variant 6ES7412-2XK07-0AB0
- Legacy system maintenance (firmware V6.0 baseline) → Source original 6ES7412-2EK06-0AB0 to avoid firmware migration
Quality Assurance & Sourcing
- All units sourced through verified industrial automation supply channels
- Each module undergoes visual inspection and functional verification prior to dispatch
- Original factory packaging preserved where available
- Batch traceability records maintained for B2B procurement compliance
- Warranty: 12 months from date of shipment (DOA replacement policy)
- Export compliance: ECCN classification reviewed per destination country regulations
How to Order
- Part Number: 6ES7412-2EK06-0AB0
- Minimum Order Quantity: 1 unit
- Lead Time: Contact us for current stock availability and lead time
- Payment: T/T, PayPal, and other B2B payment methods accepted
- Shipping: DHL / FedEx / UPS express worldwide; sea freight available for bulk orders
- Contact: [email protected] | +0086 19859288691
- Request a Quote: Include quantity, destination country, and required delivery date
Replacement & Compatibility FAQ
Q: Can I replace 6ES7412-2EK06-0AB0 with 6ES7412-2EK07-0AB0 directly?
A: In most cases yes — the EK07 is the direct successor with the same form factor and interface. However, verify that your STEP 7 / TIA Portal version supports the newer firmware before swapping.
Q: Is this CPU compatible with S7-300 racks?
A: No. The CPU 412-2 is exclusively designed for the S7-400 backplane. It is not physically or electrically compatible with S7-300 racks.
Q: Can I use a third-party memory card?
A: Siemens recommends using only genuine SIMATIC S7-400 memory cards (6ES7952 series) to ensure data integrity and warranty compliance.
Q: What is the difference between CPU 412-2 and CPU 414-2?
A: The CPU 414-2 offers significantly more work memory (up to 4 MB), faster processing, and more I/O address space. Choose CPU 414-2 when your project exceeds the 256 KB memory limit of the CPU 412-2.
Q: Do you supply new, refurbished, or surplus units?
A: We supply new-in-box, tested surplus, and refurbished units depending on availability. Condition is clearly stated on each order confirmation. Contact us for specifics.
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