

The Siemens SIMATIC S7-400H CPU 412-5H (order number 6ES7412-5HM06-0AB0) is a high-performance redundant processor engineered for continuous operation in safety-critical and high-availability industrial environments. This CPU forms the backbone of S7-400H and S7-400F/FH systems, providing automatic failover, synchronized redundancy, and deterministic real-time control. With its integrated multi-protocol interfaces and generous memory capacity, the CPU 412-5H is the ideal choice for process plants requiring zero downtime and seamless scalability. Below are the detailed technical specifications derived from the latest Siemens engineering data.
| Parameter | Specification |
|---|---|
| Product Type | CPU 412-5H |
| Order Number | 6ES7412-5HM06-0AB0 |
| Product Family | SIMATIC S7-400H |
| Application Scope | High-availability systems (S7-400H) and fault-tolerant systems (S7-400F/FH) |
| Total Memory | 4 MB (2 MB program memory + 2 MB data memory) |
| Retentive Memory | Integrated within data memory; configurable for critical process data |
| Integrated Interfaces | 1x MPI/DP (PROFIBUS DP master/slave), 1x PROFIBUS DP, 1x PROFINET (2-port switch), 2x sync module interfaces |
| Sync Module Support | Required for redundant CPU coupling (e.g., 6ES7960-1AA04-0XA0) |
| Power Supply | External 24 V DC (typical consumption: approx. 1.2 A) |
| Power Protection | External circuit breaker or fuse recommended for 24 V DC line |
| Programming Software | STEP 7 V5.5 + SP1 or higher; TIA Portal optional for configuration |
| Maximum Number of Data Blocks (DBs) | Limited by total memory; typical max. 4096 DBs |
| Maximum Number of Function Blocks (FBs) | Limited by total memory; typical max. 2048 FBs |
| Maximum Number of Functions (FCs) | Limited by total memory; typical max. 2048 FCs |
| Organization Blocks (OBs) | OB1, OB10–OB17 (time-of-day interrupts), OB20–OB23 (time-delay interrupts), OB30–OB38 (cyclic interrupts), OB40–OB47 (hardware interrupts), OB80–OB88 (error OBs), OB100–OB102 (startup), OB121–OB122 (programming errors) |
| S7 Counters | Up to 2048 (retentive option available) |
| S7 Timers | Up to 2048 (retentive option available) |
| Redundancy Mechanism | Automatic failover via sync modules; event-driven synchronization |
| Fault Tolerance Level | Supports S7-400F/FH configurations with SIL 2/3 capability (when paired with safety-rated I/O) |
| Operating Temperature | 0 °C to 60 °C (horizontal installation); 0 °C to 40 °C (vertical installation) |
| Storage Temperature | -40 °C to +70 °C |
| Relative Humidity | 5% to 95% (non-condensing) |
| Protection Class | IP20 (installed in cabinet) |
| Dimensions (W x H x D) | Approx. 50 mm x 290 mm x 210 mm (without sync module) |
| Weight | Approx. 0.6 kg |
| CE / cULus / ATEX / IECEx | CE, cULus listed; ATEX/IECEx for Zone 2 (with appropriate housing) |

What Does Our Clients Say
Mitsubishi MR-J4
Laura Navas
Great product!
2019/12/01
Keyence sensor
EQDR SALES
Original and fast!
2020/02/22