HIMA F8621/A Safety Coprocessor Module

Technical Specifications

Model:F8621/A

Brand:HIMA

Safety certification:SIL3,IEC61508,TÜV certified

Power supply:5V DC 360mA

Processor:HD64180,10MHz

Memory:384KB RAM & EPROM

Communication:2×galvanic isolated RS485,300~57600bps

Diagnosis:Built-in communication error self-monitoring

Mounting:Plug-in subrack installation,4TE width

Protection class:IP20

Operating temperature:-20~+60℃

Relative humidity:5~95% non-condensing

Weight:0.35kg

Certification:CE

System compatibility

Designed for HIMA H51q safety system,serves as auxiliary coprocessor to offload external serial communication tasks,widely used in petrochemical,chemical plant ESD emergency shutdown and F&G fire gas protection system.

Function

SIL3 safety coprocessor module.It undertakes external communication protocol processing and data exchange between HIMA safety rack and upper system such as HMI/SCADA.Dual-port RAM realizes fast data interaction with main safety CPU.Two galvanic isolated RS485 channels support Modbus RTU.When communication interruption or hardware abnormality detected,the module triggers fault alarm and system enters predefined safe state.

Installation

Plug into H51q rack backplane,match with safety CPU,configure communication parameters via SILworX engineering software.

Interface

‑Backplane safety bus connector

‑2×RS485 serial communication terminals

‑LED indicators for run,fault and communication status

Circuit feature

1oo2 fail-safe architecture,continuous hardware self-test,strong anti-electromagnetic interference,meets SIL3 functional safety requirements for hazardous industrial environment.

Feature

H51q series SIL3 coprocessor F8621/A. Common faults:communication circuit damage,backplane contact failure,memory chip failure.Confirm rack firmware version before replacement.

Diagnostic

Communication data error or hardware failure triggers fault alarm;controller executes safety interlock logic.

Built‑in function

F8621/A realizes reliable safety data exchange between SIS safety instrumented system and upper monitoring system,widely used for process plant safety spare replacement.

Product Brief

F8621/A belongs to HIMA H51q family,plug-in SIL3 auxiliary coprocessor communication module for H51q safety subrack. Verify rack compatibility before ordering.Test communication and fault diagnosis function during commissioning. ESD anti‑static protection shall be followed during installation.