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The HIMA F35 is a high-integrity, modular safety controller engineered for Safety Instrumented Systems (SIS) requiring compliance with IEC 61508/61511 up to SIL 3. Developed by HIMA Paul Hildebrandt GmbH, a global leader in functional safety, the F35 platform delivers fault-tolerant, fail-safe automation for emergency shutdown (ESD), fire & gas (F&G), burner management (BMS), and high-integrity pressure protection systems (HIPPS).
Built on a 1oo2D (One out of Two with Diagnostics) or 2oo3 architecture, the HIMA F35 uses dual or triple redundant processors with continuous cross-comparison and self-diagnostics to detect and safely respond to internal faults—ensuring dangerous failures are virtually eliminated. Its modular design supports hot-swappable power supplies, CPUs, and I/O modules, enabling maintenance without process interruption—a critical advantage in continuous operations like refineries or offshore platforms.
The system integrates seamlessly with distributed I/O (e.g., F35-I/O modules), PROFIBUS PA/DP, HART multiplexers, and Ethernet-based engineering stations, allowing centralized monitoring and remote diagnostics. With a typical response time under 40 milliseconds, the HIMA F35 meets the most stringent safety loop requirements while offering long-term availability and lifecycle support for decades-long plant operations.
HIMA F35
Technical Specifications
| Parameter Name | Parameter Value |
| Product Model | F35 (HIMA Safety System Platform) |
| Manufacturer | HIMA Paul Hildebrandt GmbH |
| Safety Certification | IEC 61508 SIL 3, IEC 61511, EN 50156, TÜV Rheinland certified |
| Architecture Options | 1oo2D, 2oo3, or 2oo4 (configurable redundancy) |
| Processor | Dual or Triple redundant 32-bit safety CPUs with lockstep comparison |
| Scan Cycle Time | As low as 10–40 ms (depending on program size and I/O count) |
| Programming Standard | IEC 61131-3 (via HIMA PASconfigurator engineering tool) |
| Communication Interfaces | – Ethernet (TCP/IP) – for engineering & diagnostics – PROFIBUS DP/PA – for field devices – RS-232/485 – for local service |
| I/O Capacity | Up to 1,024 digital and 512 analog points per system (expandable via remote racks) |
| Supported I/O Types | Digital Input/Output, Analog Input (4–20 mA, HART), RTD, Thermocouple, Pulse |
| Power Supply | Redundant 24 VDC modules with hot-swap and diagnostic feedback |
| Operating Temperature | 0°C to +60°C (32°F to 140°F) |
| Diagnostic Coverage | >99% (per IEC 61508) – including CPU, memory, I/O, and communication faults |
| MTBF (Mean Time Between Failures) | >100,000 hours (system-level) |
| Certifications | ATEX, IECEx, FM, CSA, GL, DNV, ABS (for marine/oil & gas variants) |
Main Features and Advantages
Proven SIL 3 Safety Integrity:
The HIMA F35’s hardware and software are rigorously validated to ensure dangerous undetected failure rates meet SIL 3 targets (<10>
Hot-Swappable Components:
Replace failed power supplies, CPUs, or I/O modules during live operation—minimizing downtime in 24/7 processes like ethylene crackers or LNG trains.
Seamless Integration with Field Devices:
Native support for HART over analog inputs and PROFIBUS PA enables smart device diagnostics without additional gateways—reducing cost and complexity.
Long-Term Lifecycle Support:
HIMA guarantees 10+ years of spare parts availability and offers migration paths to newer platforms (e.g., H51q) while maintaining logic compatibility.
Application Field
The HIMA F35 is deployed wherever functional safety is non-negotiable:
Oil & Gas Upstream/Downstream: Offshore platform ESD, pipeline HIPPS, refinery reactor protection
Chemical & Petrochemical: Polymerization reactor shutdown, chlorine handling interlocks
Power Generation: Boiler protection, turbine trip systems, hydrogen cooling safety
Pharmaceutical & Biotech: Sterilization autoclave overpressure protection
Marine & Offshore: FPSO cargo tank inerting control, ballast system safety
Mining & Metals: Furnace gas detection and isolation systems
In all cases, the HIMA F35 acts as the last line of defense—ensuring that when sensors detect danger, the system responds safely, predictably, and instantly.
HIMA F35
Related Products
HIMA F30 / F86: Legacy platforms;F35 is the modernized successor with higher performance
HIMA H51q: Next-generation safety controller (successor to F35) with Ethernet/IP and OPC UA
HIMA F35-I/O Modules: e.g.,F-DI 8, F-DO 8, F-AIH 4 – hot-swappable safety I/O
HIMA PS-F35: Redundant 24VDC power supply module for F35 chassis
HIMA PASconfigurator: Official engineering software for programming and diagnostics
HIMA FSC (Fail Safe Controller): Older product line; F35 offers improved modularity and diagnostics
