HIMA F3224 is a rare 16-channel SIL3 digital input module within the F3 series. It features enhanced diagnostics and high isolation and has been discontinued. Spare parts are the only available option.

1. Basic Information

Model: F3224

Brand/series: HIMA (Black Horse) / F3 Series (19" Rack-mounted SIS)

Function: 16-channel safety digital input DI

Safety level: SIL3 (IEC 61508), TÜV Certification, Cat.4/PL e

Programming software: ELOP II

Status: Discontinued (EOL), no new stock available from the original manufacturer

II. Electrical Specifications

Channels: 16 DI channels, each channel with independent diagnosis

Input signals: 24 VDC dry contacts / 8 mA NAMUR sensors

Isolation: 2.5 kVrms high isolation (higher than F3221/F3222)

Response time: Typical 8 ms (faster than F3221)

Power supply: Backplane 5 VDC (80 mA) or external 24 VDC (150 mA)

Diagnosis: Open circuit / short circuit / line resistance detection, channel-level fault isolation

Environment: 0 ℃ to +60 ℃, IP20

Size/Weight: 19" rack, 4TE wide; approximately 0.12 kg

III. Comparison with Modules of the Same Series

F3221/F322116: 16DI, 2 kV isolation, 10 ms, basic diagnosis

F3222: 16DI, 2 kV isolation, 10 ms, enhanced diagnosis

F3223: 32DI (2×16), 2 kV isolation, 10 ms, dual group diagnosis

F3224: 16DI, 2.5 kV high isolation, 8 ms fast response, most comprehensive diagnosis

IV. Alternative Suggestions

Direct replacement: F3222 (same as 16DI, enhanced diagnosis, compatible with rack)

High isolation replacement: No fully isolated model available, use F322116 + external isolation barrier

System upgrade: HIMatrix F35 or HIMax (SILworX, modern I/O)