I. Numbering Explanation

F3248: Basic model (16-channel medium-voltage safety DI)

316: Hardware version + configuration combination (compatible for the same function)

Standard part number: 984324802 (must be filled in during order)

II. Core Parameters (Same as F3248)

Channels: 16 independent safety digital inputs, each channel with 1500Vrms isolation

Signals: 48V AC/DC (40–60V AC / 40–75V DC), dry contact / relay

Safety level: SIL3 (IEC 61508), TÜV AK6, Cat.4/PL e

Diagnosis: Open circuit / short circuit / line resistance monitoring, fault → safety low level

Electrical: Input current 2–8mA; response 10ms; debounce 0–255ms (configurable)

Power supply: Backplane 5VDC (160mA) + 24VDC (110mA)

Environment: -20℃ to +60℃, IP20; supports hot swapping

III. Comparison with high-voltage model F3240316

F3248316: 16 channels, 48V AC/DC, medium-voltage isolation, SIL3

F3240316: 16 channels, 120V AC/DC, high-voltage isolation, SIL3

IV. Selection Suggestions

48V medium-voltage switch input: Select F3248316 (i.e., F3248)

120V high-voltage input: Select F3240316

24V NAMUR standard: Select F3226A (16 channels)