F8650A (HIMA High Performance Secure CPU Module) Basic Information

Model: F8650A

Brand: HIMA (Germany)

Series: HIQuad H51q Safety Instrumentation System (SIS)

Type: Dual CPU locked-step redundant safety controller (central module)

Safety level: IEC 61508 SIL3 (TÜV AK6 certified)

Installation: 19" rack, 8SU width

Status: In service, part of the same series as F8650X/F8650E

Hardware Specifications

Processor: 2× Intel 386EX 32-bit, 25MHz, clock synchronization (clocking lock)

Memory (per CPU):

System Flash: 1MB

User Program Flash: 1MB

Data SRAM: 1MB

Dimensions: Approximately 40mm × 186mm × 128mm

Weight: Approximately 0.3kg

Electrical Parameters

Power Supply: 24VDC (18~32VDC)

Power Consumption: Typical 5W

Safety Watchdog: 24V output, maximum 500mA, short circuit protection

Communication Interface

Serial Port: 2× Isolated RS485, supports Modbus RTU

Backplane Bus: Special I/O bus, connects H51q series I/O modules

Environmental Parameters

Operating Temperature: 0℃ ~ +60℃

Storage Temperature: -40℃ ~ +85℃

Relative Humidity: 5%~95%, no condensation Core function

Safety logic control: Implement ESD, BMS, F&G, and process safety interlocks.

Dual-machine lockstep redundancy: Dual CPUs operate synchronously, perform real-time comparison, and automatically shut down in case of faults.

Comprehensive hardware self-diagnosis: Diagnostic coverage ≥ 99%, monitor voltage, temperature, communication, and memory.

Online maintenance: Supports hot swapping, the redundant system can be replaced online without interrupting operation.

4-digit diagnostic display: Displays status, station address, and fault codes; equipped with PWR/RUN/ALM indicator lights.

Model differences (F8650A vs F8650X vs F8650E)

F8650A: Standard type, basic dual CPU redundancy, suitable for general SIS applications.

F8650X: Enhanced type, with matrix switching, supports larger I/O scale and flexible signal routing.

F8650E: Wide temperature range type (-40℃~+70℃), suitable for extreme environments.