HIMA F8652X Central Processing Unit (984865265)

The HIMA F8652X (order number 984865265) is a state-of-the-art central processing unit (CPU) module for the HIMax programmable safety system. It is engineered to handle the most demanding safety instrumented functions requiring SIL 3 capability according to IEC 61508. With a powerful 32-bit processor and dedicated safety coprocessor, the F8652X executes complex safety logic with cycle times as low as 5 ms. It supports redundant configurations (1oo2D) for high-availability applications and includes multiple integrated communication interfaces for seamless integration into plant safety networks. The module is hot-swappable in redundant mode, ensuring maximum system uptime.

Key Features

• SIL3 Certified: Suitable for the highest risk reduction levels in process safety.

• High Processing Speed: Cycle times down to 5 ms enable fast reaction to process events.

• Redundancy Ready: Can operate as a single CPU or in 1oo2D redundant pair with automatic switchover.

• Integrated Safety Communication: Four Ethernet ports supporting HIMA's safe Ethernet protocols (SafetyNET) and standard protocols like Modbus TCP.

• Extensive Memory: 64 MB application memory (non-volatile) and 128 MB RAM for large programs and data.

• Comprehensive Diagnostics: Continuous self-monitoring of CPU, memory, power, and communication with detailed error reporting.

Technical Specifications

• Processor: 32-bit RISC, 400 MHz + safety coprocessor

• Memory: 64 MB Flash (user program), 128 MB RAM

• Cycle Time: ≥ 5 ms (configurable)

• Communication Interfaces: 4× Ethernet (10/100), 2× RS-232 (service), 2× safe backplane connectors

• Power Supply: 24 VDC ±20% via backplane

• Safety Integrity: SIL 3 per IEC 61508, PL e per ISO 13849-1

• Operating Temperature: -20°C to +60°C

• Certifications: TÜV Rheinland, CE, UL, ATEX (Zone 2)

Applications

The F8652X is the core of large-scale safety instrumented systems in refineries, petrochemical plants, offshore platforms, power stations, and pipelines. It handles complex safety functions such as emergency shutdown (ESD), fire and gas detection (F&G), burner management (BMS), and high-integrity pressure protection (HIPPS). Its high performance also suits applications requiring fast logic solving, such as overspeed protection for turbines and compressors.

Integration and Programming

Programming is performed using HIMA's SILworX engineering tool, which supports IEC 61131-3 languages and includes certified function blocks. The F8652X can be part of a distributed safety network with remote I/O racks (e.g., F3xx I/O modules) communicating over SafetyNET. Redundant configurations are configured within SILworX, which handles synchronization and diagnostics automatically. The CPU also supports OPC UA for secure data exchange with higher-level systems.

Reliability and Safety Architecture

The F8652X features a 1oo2 architecture with lockstep processors and comparison logic, ensuring that any single fault is detected and the system remains safe. Memory protection includes ECC, and communication paths are continuously monitored. The module meets all requirements for SIL 3, including hardware fault tolerance (HFT 1) and systematic capability (SC 3). Its robust design and high MTBF ensure long-term reliable operation.

The HIMA F8652X (984865265) CPU module delivers the performance, reliability, and safety required for protecting critical assets in the world's most demanding industrial processes.