HIMA F3231 8-Channel SIL3 Safety Digital Input Module for HIMatrix SIS System

Product Description

F3231 is an 8-channel safety digital input module from Germany HIMA HIMatrix F-series platform, certified TÜV SIL3 per IEC 61508 for safety instrumented systems.

It collects 24VDC dry contact or PNP safety signals including emergency stop buttons, valve feedback, flame detectors and fire & gas switches. Every channel adopts 

independent galvanic isolation with full hardware self-diagnosis to detect open circuit, short circuit and channel faults.

Designed for fault-safe de-energize-to-trip logic, the module transmits digital signals to HIMatrix safety CPU via dedicated internal safety bus. Compact DIN rail rack plug-in design, 

widely used as maintenance spare for petrochemical, power and offshore ESD/FGS safety cabinets.

Technical Specifications

PN: F3231, Manufacturer: HIMA Paul Hildebrandt, Germany

Safety Certification: IEC 61508 SIL3, TÜV AK6

Channel Count: 8 isolated digital input channels

Input Signal: Dry contact / 24VDC PNP sensor

Channel Isolation: 250V galvanic isolation between field and backplane

Nominal Input Current: 6mA per channel

Signal Response Time: ＜10ms

Backplane Supply: 24VDC, power consumption ＜3W

Operating Temp: -20℃ ~ +60℃; Storage Temp: -40℃ ~ +85℃

Humidity: 5%–95% non-condensing, IP20 cabinet grade

Mount: Standard HIMatrix rack plug-in

Weight: ~200g

Supporting System: HIMatrix safety controller series

Key Features

SIL3 high safety integrity rating, fully compliant with process safety SIF loop requirements.

8 independent isolated channels eliminate ground loop and EMI field interference.

Complete channel self-diagnosis for open/short wiring faults with front LED status indication.

Fault-safe design follows de-energized-to-trip principle to avoid safety system failure.

Fast signal response under 10ms for rapid emergency interlock signal capture.

Compact single-slot structure saves cabinet space for multi-point safety signal collection.

Full compatibility with all HIMatrix CPU, output and communication modules.

Rugged industrial hardware stable for long-term 24/7 operation in chemical and power plant environments.

Application Scope

ESD emergency shutdown system safety switch signal acquisition module for refineries and chemical plants

FGS fire & gas detection interlock digital input card for LNG terminals and offshore platforms

Power plant boiler BMS, gas turbine safety valve feedback monitoring unit

Hazardous chemical tank area emergency stop and alarm signal collection spare part

Global aging HIMA HIMatrix SIS safety system overhaul, spare inventory and cabinet upgrade