HIMA F8650X Central Safety Module SIL 3

HIMA F8650X Central Safety Module

The F8650X is the core processing module for the HIMA PES (Programmable Electronic System) H51q series. It is a safety-certified controller designed for high-integrity applications up to SIL 3 according to IEC 61508.

Core System Specifications

• Brand: HIMA
• Model Number: F8650X
• Product Type: Central Safety Module (CPU)
• Safety Level: Up to SIL 3 (IEC 61508)
• Microprocessor: Intel 386EX, 32-bit (Dual, synchronized)
• Clock Frequency: 25 MHz
• Operating Data (Backplane): 5 V / 2 A
• Space Requirement: 8 Subrack Units (SU)

Memory Configuration (per CPU)

• Operating System Memory: Flash-EPROM, 1 MB
• User Program Memory: Flash-EPROM, 1 MB *
• Data Memory: SRAM, 1 MB *
• * Note: Usable capacity depends on the operating system version.

Interfaces & Safety Features

• Communication Interfaces: 2 x RS-485 (electrically isolated)
• RS-485 Pinout (9-pin):
  • Pins 3, 8: RxD/TxD Data Lines (A, B)
  • Pin 5: Data Ground (DGND)
  • Pins 4, 9: Control Signals (CNTR-A, CNTR-B)
  • Pins 2, 6: 5V Power (RP, VP)
• Safety Watchdog Output: 24 V DC, loadable up to 500 mA, short-circuit proof
• Diagnostic Display: 4-digit alphanumeric matrix display with configurable information
• Diagnostic LEDs: Two LEDs for CPU and I/O error indication
• Control Switches: Toggle switches for detailed error info; ACK button to reset errors.

Communication & Advanced Features

• Works with communication module F8627X for Ethernet connectivity (ELOP II TCP, safeethernet, Modbus TCP).
• Supports Self-education feature (from OS BS41q/51q V7.0-8) for automatic configuration.
• Supports ELOP II TCP protocol for high-speed, safe communication.
• Critical for system upgrades: Replacing an older F8650 with an F8650X requires updating the fan cooling concept.

Maintenance & Battery Information

• Buffer Battery Lifespan:
  • 1000 days at 25°C
  • 200 days at 60°C
• Battery Replacement: Recommended every 6 years maximum, or within 3 months if BATI warning appears.
• Battery Type: Lithium CR 2477N (HIMA P/N 44 0000018)
• Important Check: Verify bus station number and transmission rate settings on switch S1 during startup.

Typical Applications

• Emergency Shutdown Systems (ESD) in oil & gas and chemical plants.
• Fire & Gas (F&G) protection systems.
• Turbine and compressor control.
• Railway interlocking and process automation safety.

For system upgrades or to order the HIMA F8650X central module, contact our safety systems experts.

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