Description
The Siemens 6ES7414-4HM14-0AB0 is a fault-tolerant central processing unit from the SIMATIC S7-400H series, purpose-built for high-availability automation systems that demand uninterrupted operation . As a CPU 414-4H model, the Siemens 6ES7414-4HM14-0AB0 integrates 2.8 MB of RAM (evenly split between 1.4 MB program and 1.4 MB data memory) and executes binary instructions in just 45 nanoseconds, making it a powerful choice for complex process control, power generation, and critical infrastructure applications .
Application Scenarios
In a 600MW thermal power plant, the boiler feedwater control and turbine protection systems cannot tolerate even a few seconds of downtime. A single CPU failure could trigger an unplanned shutdown, costing hundreds of thousands of dollars per day. The Siemens 6ES7414-4HM14-0AB0 is deployed in a redundant S7-400H configuration with two identical CPUs operating in hot-standby mode. If the primary 6ES7414-4HM14-0AB0 fails, the secondary unit assumes control within milliseconds via the synchronization modules (IF 960), ensuring seamless failover without process interruption . In a chemical plant’s emergency shutdown (ESD) system, the Siemens 6ES7414-4HM14-0AB0 can be combined with F-runtime authorization to create a fault-safe S7-400F/FH system, meeting SIL 3 safety integrity levels for critical reactor protection .
Parameters
| Main Parameters | Value / Description |
|---|---|
| Product Model | 6ES7414-4HM14-0AB0 (CPU 414-4H) |
| Manufacturer | Siemens AG |
| Product Category | Fault-Tolerant CPU for S7-400H / S7-400F/FH |
| Work Memory | 2.8 MB total (1.4 MB program + 1.4 MB data) |
| Bit Instruction Processing Time | 45 ns – high-speed execution for complex logic |
| Floating-Point Operation Time | 135 ns – efficient for analog control algorithms |
| Interfaces | 1x MPI/PROFIBUS DP (12 Mbit/s) + 1x PROFIBUS DP (12 Mbit/s) |
| Sync Module Slots | 2 dedicated slots for IF 960 fiber-optic synchronization modules |
| Max Digital I/O | 65,536 / 65,536 – extensive I/O capacity for large systems |
| Max Analog I/O | 4,096 / 4,096 – supports large-scale process applications |
| Profibus DP Slaves (Interface 2) | Up to 96 DP devices |
| Power Supply | 24 V DC (via backplane) |
| Power Loss | Typ. 6 W |
| Operating Temperature | 0°C to +60°C (cabinet installation) |
| Dimensions (W×H×D) | 50 × 290 × 219 mm (occupies 2 slots) |
