HIMA F8650A SIL3 Safety Processor Module

Technical Specifications

Model:F8650A

Brand:HIMA

Safety certification:SIL3,IEC61508,EN954-1 Cat.4

Power supply:5V DC

Processor:Dual Intel 386EX,25MHz clock-synchronized

Memory:1MB Flash-EPROM per CPU,1MB SRAM,battery backup for data retention

Communication:2×galvanic isolated RS485 serial ports

Display:4-digit matrix diagnostic display

Diagnosis:Hardware watchdog,permanent self-test,dual processor cross-comparison

Mounting:Plug-in subrack installation,8TE width

Protection class:IP20

Operating temperature:-20~+60℃

Relative humidity:5~95% non-condensing

Weight:0.40kg

Certification:CE

System compatibility

Designed for HIMA H51q safety system,runs safety application program,executes safety interlock logic and SOE sequence of event recording,widely used in petrochemical,chemical plant ESD emergency shutdown and F&G fire gas protection system.

Function

SIL3 1oo2D redundant safety processor module.Two clock-synchronized 32-bit processors cross-verify calculation results to eliminate single point failure.It executes safety logic program,collects field I/O data and outputs safety shutdown commands.Built-in hardware watchdog and continuous hardware self-test.When processor mismatch or hardware fault detected,the module triggers fault alarm and system enters predefined safe state.

Installation

Plug into H51q rack backplane,match with I/O and communication modules,download safety project via SILworX engineering software.

Interface

‑2×RS485 serial communication terminals

‑4-digit front panel diagnostic display

‑Backplane safety bus connector

‑LED indicators for run,fault and communication status

Circuit feature

1oo2D fail-safe safety architecture,dual processors cross-check,continuous hardware self-test,strong anti-electromagnetic interference,meets SIL3 functional safety requirements for hazardous industrial environment.

Feature

H51q series SIL3 safety processor F8650A. Common faults:firmware mismatch,backplane contact failure,memory chip aging.Confirm rack firmware version before replacement.

Diagnostic

Processor calculation mismatch,communication error or internal hardware fault triggers fault alarm;controller executes safety interlock logic.

Built‑in function

F8650A performs safety logic calculation and SOE sequence of event recording for SIS safety instrumented system emergency shutdown protection,widely used for process plant safety spare replacement.

Product Brief

F8650A belongs to HIMA H51q family,plug-in SIL3 1oo2D redundant safety CPU module for H51q safety subrack. Verify rack compatibility before ordering.Test safety logic and self-diagnosis function during commissioning. ESD anti‑static protection shall be followed during installation.