F323838 = Version / Customization Number of HIMA F3238 (Standard Type), with exactly the same functions as F3238. The material number is 984323802 and it is currently in production.

I. Meaning of the Number

F3238: Basic model (8 channels of SIL3 safety DI, intrinsically safe Ex ia)

38: Hardware version / batch number / customization suffix, does not affect functionality and interchangeability

Standard part number: 984323802 (This number can be used as an alternative during ordering)

II. Core Parameters (Same as F3238)

Channels: 8 safety digital input DI, SIL3/AK6/Cat.4/PL e

Signals: 24 VDC dry contacts / NAMUR (8mA) / Intrinsically Safe Ex ia IIC

NAMUR Threshold: 0.4–1.1mA = 0; 2.2–5.8mA = 1; ≤ 0.3mA = Open Circuit; ≥ 6.8mA = Short Circuit

Diagnosis: Single-channel open circuit / short circuit / line resistance (≤ 50Ω) detection

Response: Typical 12ms; Isolation: 2kVrms

Power Supply: Backplane 5VDC (100mA) + 24VDC (180mA)

Environment: -20℃ to +60℃, IP20; Compatible with explosion-proof areas

III. Comparison with Similar Models

F323838/F3238: 8 channels, Intrinsically Safe Ex ia, suitable for explosion-proof scenarios

F323738/F3237: 8 channels, standard NAMUR, no Intrinsically Safe, conventional scenarios

F3226A: 16 channels, 8mA NAMUR, non-explosion-proof

IV. Ordering and Alternatives

Direct Order: F3238 (984323802), fully compatible with F323838

Alternative Suggestions: Explosion-proof select F3238; Non-explosion-proof select F3237; 16 channels select F3226A