HIMA F8621A Safety Coprocessor Module

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Technical Specifications

Model:F8621A

Brand:HIMA

Safety certification:SIL3,IEC61508,TÜV certified

Power supply:5V DC,360mA

Processor:HD64180,10MHz

Memory:384KB RAM & EPROM

Communication:2×half-duplex RS485,galvanic isolation,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,undertakes external serial communication data exchange between safety rack and upper HMI/SCADA,widely used in petrochemical,chemical plant ESD emergency shutdown and F&G fire gas protection system.

Function

SIL3 safety coprocessor module.It offloads serial communication tasks from main safety CPU via dual-port RAM.Two galvanic isolated RS485 channels support Modbus RTU communication.Continuously monitors communication status.When communication interruption or hardware anomaly detected,the module triggers fault alarm and system enters predefined safe state.

Installation

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

Interface

‑Backplane safety bus connector

‑2×RS485 serial communication terminals

‑DIP switch for baud rate setting

‑LED indicators for run,fault and communication status

Circuit feature

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

Feature

H51q series SIL3 coprocessor F8621A. Common faults:communication circuit damage,backplane contact failure,memory chip aging.Confirm rack firmware version before replacement.

Diagnostic

Communication interruption or data transmission error triggers fault alarm;controller executes safety interlock logic.

Built‑in function

F8621A realizes reliable safety data exchange between SIS safety instrumented system and upper monitoring system,widely used for process plant safety spare replacement.

Product Brief

F8621A 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.