General Information

• Brand: Siemens
• Part Number: 6ES7416-2FK02-0AB0
• Product Series: SIMATIC S7-400F (F = Fail-Safe, for safety-critical applications)
• Product Type: Central Processing Unit (CPU)
• Product Subfamily: CPU 416F-2 DP (safety-oriented variant with Profibus DP)
• Safety Certification: Complies with EN ISO 13849-1 (SIL 3), IEC 61508 (SIL 3), and IEC 61131-3, suitable for safety-related control tasks (e.g., emergency stops, protective door monitoring).
• Compatibility: Works with S7-400F backplane racks and safety-related I/O modules (e.g., SM 326 F DI/DO); configurable via STEP 7 (V5.4 SP5 or higher) with S7 F/H Software Package.

Technical Specifications

1. Processing & Memory

• Processor Performance: 0.1 µs per binary instruction (standard operations), enabling fast execution of both standard and safety-related user programs.
• Memory Configuration:
  • Work Memory (Standard): 16 MB (8 MB code + 8 MB data) for non-safety programs.
  • Work Memory (Safety): 4 MB dedicated for safety-related program logic and data.
  • Load Memory: Supports external SIMATIC Memory Cards (128 MB to 4 GB) for program storage, backup, and firmware updates.
  • Retentive Memory: 64 KB (for retaining critical standard/safety data during power-off, expandable via memory card).

2. Communication Interfaces

• Built-in Interfaces:
  • 2 x Profibus DP interfaces (Port 1: MPI/DP, Port 2: DP), both supporting transmission rates up to 12 Mbit/s.
    • Port 2 (DP) can be configured as a safety-related Profibus DP master to connect fail-safe I/O modules (e.g., SM 326F) and safety devices.
  • 1 x Mode selector switch (RUN/STOP/MRES) for manual CPU state control and memory reset.
• Expansion: 1 x IFM (Interface Module) slot for optional communication modules (e.g., Profinet, Industrial Ethernet) to extend network connectivity beyond Profibus DP.

3. Power Supply & Electrical Ratings

• Input Voltage: 24 V DC (tolerance range: 20.4 V DC – 28.8 V DC)
• Power Consumption: Typical 20 W (no external loads or expansion modules)
• Backplane Bus Current: Supplies 5 V DC / 3 A to the S7-400 backplane bus for powering connected standard and safety I/O modules.

4. Operating Environment

• Temperature Range:
  • Operating: 0 °C – 60 °C (suitable for industrial control cabinets)
  • Storage: -25 °C – 70 °C
• Humidity: 5% – 95% (non-condensing, compliant with IEC 61131-2)
• Electromagnetic Compatibility (EMC): Complies with EN 61000-6-2 (industrial immunity) and EN 61000-6-4 (emission), resisting interference from motors, drives, and safety equipment.
• Vibration/Shock Resistance:
  • Vibration: 5 Hz – 150 Hz, 0.5 g acceleration (IEC 60068-2-6)
  • Shock: 15 g acceleration (11 ms duration, IEC 60068-2-27)

5. Mechanical Characteristics

• Dimensions (W×H×D): 40 mm × 290 mm × 210 mm (fits standard S7-400 backplane rack slots)
• Mounting Method: Installed in S7-400F backplane racks (e.g., UR1F, UR2F) via slide-in mounting
• Protection Level: IP20 (front panel; prevents dust and small debris from entering internal components)

Functional Features

1. Safety-Critical Control: Executes both standard automation programs and fail-safe programs (via F-runtime system), ensuring safety functions (e.g., emergency stop, overtravel protection) respond within milliseconds to hazardous events.
2. Dual-Core Redundancy (Safety): Integrates a dual-core architecture for safety program execution—both cores run identical safety logic and cross-verify results, preventing single-point failures (compliant with SIL 3).
3. Profibus DP Safety Communication: Port 2 supports Profibus DP V2.0 for safety-related data exchange with fail-safe I/O modules, ensuring deterministic and error-free transmission of safety signals.
4. Diagnostic & Safety Monitoring:
   • Built-in self-diagnosis for CPU hardware, memory, and communication interfaces; sends detailed fault codes via LEDs and STEP 7.
   • Monitors safety program integrity (e.g., unauthorized modifications) and triggers a safe state if anomalies are detected.
5. Seamless Safety Integration: Works with S7-400F safety I/O modules (e.g., SM 326F DI, SM 326F DO) and safety relays, enabling end-to-end safety solutions without additional hardware.
6. Standard & Safety Task Separation: Allocates separate processing resources for standard and safety tasks, ensuring safety functions are not delayed by non-safety operations.

Application Areas

• Safety-Critical Manufacturing: Used in automotive assembly lines, machine tooling, and robotics to implement safety functions (e.g., protective door interlocks, emergency stop circuits) that prevent operator injury.
• Process Industry: Ideal for chemical, petroleum, and pharmaceutical plants to control safety-related processes (e.g., pressure relief valve activation, toxic gas detection) and comply with SIL 3 requirements.
• Material Handling: Applied in conveyor systems, elevators, and automated guided vehicles (AGVs) to monitor load limits, stop positions, and collision avoidance systems.
• Energy & Utilities: Used in power generation (e.g., wind turbines, thermal plants) and water treatment facilities to control safety shutdown sequences for critical equipment.