

The SIEMENS SIMATIC S7-400H CPU 414-4H PG (MLFB 6ES7414-4HR14-0AB0) is a flagship redundant processor engineered for the most demanding fault-tolerant automation systems. Part of the S7-400H series, this CPU delivers deterministic performance, dual-channel synchronization, and extensive I/O capacity, making it the backbone of high-availability solutions in process control, power plants, and large-scale manufacturing. Below is the comprehensive technical specification derived from official Siemens documentation and field-proven engineering knowledge.
| Parameter | Specification |
|---|---|
| Product Type | CPU 414-4H PG (Redundant) |
| Order Number | 6ES7414-4HR14-0AB0 |
| Total Memory | 12 MB (10 MB data / 2 MB program) |
| Integrated Interfaces | 1x MPI/DP (12 Mbps), 1x DP (12 Mbps), 2x Sync module ports |
| Sync Module Compatibility | 6ES7960-1AA04-0XA0 (fiber optic) or 6ES7960-1AB04-0XA0 (electrical) |
| Max. DP Slaves per Interface | 125 (MPI/DP), 125 (DP) – standard mode |
| Max. Number of I/O Modules | Up to 21 modules per rack (CR/ER), expandable via IM |
| Max. Digital I/O | 65,536 (via DP) |
| Max. Analog I/O | 4,096 (via DP) |
| Program Blocks (max.) | DB, FB, FC: limited by memory; OB: OB1, OB10-17, OB20-23, OB30-38, OB40-47, OB80-88, OB100-122 |
| S7 Counters / Timers | Unlimited (RAM-based), retentive per configuration |
| Bit Operation Time | ~0.02 µs (typical) |
| Word Operation Time | ~0.04 µs |
| Fixed-Point Arithmetic | ~0.05 µs |
| Floating-Point Arithmetic | ~0.15 µs |
| Power Supply | 24 V DC (external, e.g., PS 407 series) |
| Current Consumption | Typically 1.2 A (without expansion) |
| Power Dissipation | Approx. 8 W |
| Operating Temperature | 0 °C to +60 °C (horizontal), 0 °C to +40 °C (vertical) |
| Storage Temperature | -40 °C to +70 °C |
| Relative Humidity | 5% to 95% (non-condensing) |
| Protection Class | IP20 (when installed in cabinet) |
| Redundancy Support | Yes – automatic switchover, sync modules required |
| Programming Software | STEP 7 V5.5 + SP1 or higher (TIA Portal not supported) |
| Firmware Version | V6.0 (as delivered), upgradeable via memory card |
| Weight | Approx. 0.8 kg |
| Dimensions (W x H x D) | 50 mm x 290 mm x 210 mm (with front connector) |
| Compliance | CE, UL, CSA, cULus, ATEX (Zone 2 with Zener barrier) |
| Warranty | Standard 12 months (extended available upon request) |

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