HIMA F3224A Intrinsically Safe Digital Input Module

Technical Specifications

Model:F3224A

Brand:HIMA

Safety certification:SIL2,IEC61508,TÜV certified,ATEX Ex i

Channel:4 intrinsically safe digital input channels

Input signal:Dry contact or NAMUR proximity sensor

Diagnosis:Wire break and short circuit detection for hazardous area loops

Mounting:Plug-in subrack installation,4TE width

Protection class:IP20

Power supply:24V DC

Operating temperature:-20~+60℃

Relative humidity:5~95% non-condensing

Weight:0.40kg

Certification:CE,ATEX

System compatibility:Revised version based on F3224,designed for HIMA HIQuad H41q / H51q safety control system.It acquires safety signals from sensors and switches installed in explosive hazardous zones,widely used in petrochemical,chemical plant ESD emergency shutdown and F&G fire gas protection system.

Function:SIL2 intrinsically safe digital input module.Receives signals from hazardous area NAMUR sensors and contact switches,provides galvanic isolation between hazardous area and safe control cabinet,continuously monitors field wiring for wire break and short circuit faults.The A version optimizes internal circuit and component reliability compared with standard F3224.

Installation:Plug into HIQuad H41q/H51q rack backplane,wire intrinsically safe field devices to module terminals,complete hardware configuration via ELOPII engineering software.

Interface:

‑4 channels intrinsically safe input terminals

‑Backplane bus connector for power and data exchange

‑LED indicators for channel status and fault

Circuit feature:Intrinsically safe galvanic isolation design,periodic hardware self-test,ATEX explosion-proof certification,strong anti-electromagnetic interference,meets IEC61508 functional safety requirements for hazardous industrial environment.

Feature:F3224A is upgraded revision of F3224 Ex i input module. Common faults:isolation circuit damage,signal acquisition abnormal,connector pin failure.Confirm H41q/H51q rack firmware version before replacement.

Diagnostic:Module or wiring fault triggers channel fault alarm;controller marks corresponding input signal invalid and executes safety interlock logic.

Built‑in function

F3224A collects safety signals from hazardous area field devices for safety interlock and emergency shutdown protection,widely used for chemical and power plant safety spare replacement.

Product Brief

F3224A belongs to HIMA HIQuad I/O family,plug-in 4-channel SIL2 Ex i intrinsically safe digital input module (revised A version). Verify rack compatibility and explosion-proof zone requirements before ordering. Test signal acquisition and line diagnosis function during commissioning. ESD anti‑static protection shall be followed during handling.