Description
Product Overview
The HIMA F8650X is a safety central CPU module for HIMA HIMatrix PES H51q safety systems. It adopts a dual synchronized 32-bit Intel 386EX processor architecture to execute safety application logic, perform continuous cross-comparison between two processors for fault detection, and manage I/O bus communication, system diagnostics and safety shutdown logic. It serves as the core safety controller for SIL3 safety instrumented systems, widely used for ESD, F&G and turbine safety protection in critical industrial sites.
Technical Specifications
| Parameter | Details |
|---|---|
| Manufacturer | HIMA Paul Hildebrandt (Germany) |
| Model | F8650X |
| Module Type | Safety Central CPU Module |
| Processor | Dual Intel 386EX 32-bit, 25 MHz clock |
| Memory | OS Flash-EPROM:1 MB; User Program Flash-EPROM:1 MB; SRAM Data:1 MB |
| Internal Power | 5VDC, 2A |
| Communication Interfaces | 2 × isolated RS485 serial ports; backplane I/O bus |
| Safety Certification | SIL 3 per IEC 61508 |
| Form Factor | 8 SU Eurocard rack module |
| Front Panel | 4-digit diagnostic display; CPU / I/O fault LEDs, ACK button |
| Backup Battery | CR2477N lithium battery for SRAM data retention |
| Operating Temperature | 0°C ~ +60°C |
| Storage Temperature | -40°C ~ +85°C |
| Relative Humidity | 5% ~ 95%, non-condensing |
| Mounting | Eurocard rack mount inside HIMatrix H51q subrack |
Key Features
- Dual synchronous processor design with continuous cross-checking for safety logic execution
- Integrated front-panel 4-digit alphanumeric diagnostic display and status LEDs for fast fault localization
- Two galvanically isolated RS485 interfaces for system communication and HMI connection
- Hardware watchdog safety timer to force safe state upon CPU failure
- Supports IEC 61131-3 programming for safety application logic
- Onboard lithium backup battery preserves user data and fault history during power loss
- Continuous self-test of memory, processor, communication paths and internal power circuits
- Works with HIMA H51q-MS, H51q-HS, H51q-HRS system racks
Installation & Test Notes
- Cut off rack power and follow lockout/tagout before removing or inserting the F8650X module.
- Use ESD protection; avoid touching PCB traces and connector pins.
- Insert module fully into the 8SU rack slot and fasten front retaining screw.
- Check lithium backup battery condition and replace when reaching end of service life.
- Restore rack power; observe boot sequence, verify no CPU or I/O fault LEDs active.
- Connect programming tool to download safety application and validate logic execution.
- Perform fault injection test to confirm the module transitions to predefined safe state.
- Verify diagnostic display correctly reports faults and event logging functions.
Application
Emergency shutdown (ESD), fire & gas (F&G), turbine protection and burner management safety systems in oil & gas refineries, chemical plants, power generation and pipeline facilities.
FAQ
Q: What safety level does F8650X support? A: It is SIL3 certified in accordance with IEC 61508 for safety instrumented functions.
Q: Can F8650X work with Ethernet directly? A: No native Ethernet port; Ethernet communication requires additional HIMA communication modules such as F8627X.
Q: What is the purpose of the backup lithium battery? A: It retains SRAM data, fault logs and system parameters during main power outage.
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