HIMA F 3237 Input Module

Core Performance & Industrial Application

The HIMA F 3237 (F3237) is an 8-channel safety-related input module for HIMatrix/H41q-H51q safety systems.

It connects NAMUR (DIN 19234/EN 60947-5-6) proximity switches and resistor-wired sensors and monitors every line for wire break and short circuit.

A 0 signal detects input current 0.35-1.2 mA; a 1 signal 2.1-6.0 mA; wire break below 0.28 mA, short circuit above 6.5 mA, switching time ~10 ms.

Continuous automatic self-test runs during operation; the module meets AK1-AK6 requirement classes and SIL 3 per IEC 61508.

It serves emergency-stop and position sensing in safety PLC cabinets as spare replacement.

Technical Specifications

▶ Product type: 8-channel safety input module

▶ Brand: HIMA

▶ Model: F 3237 (F3237)

▶ Inputs: 8 × NAMUR proximity / resistor-wired sensor channels

▶ Sensor loop supply: 8.2 V; line impedance max 50 Ω; line length up to 1000 m (0.5 mm²)

▶ Current thresholds: 0 signal 0.35-1.2 mA; 1 signal 2.1-6.0 mA; break <0.28 mA; short >6.5 mA

▶ Switching time: ~10 ms; continuous self-test, crosstalk walking-0 test

▶ Power: 90 mA @5 VDC; 170 mA @24 VDC; 4 TE rack slot

▶ Safety: AK1-AK6, SIL 3 (IEC 61508); HB-RTE- software block

▶ Feature: Per-channel line monitoring, LED status, H41q/H51q compatible

▶ Weight: Approx. 0.14-0.35 kg; 4 TE

▶ Country of origin: Germany

▶ Compliance: CE, UL certification

Industry Applications

Applied in emergency-stop, door/guard position and safety interlock input spare replacement on HIMA safety PLC racks.

Note: Confirm revision and sensor type against nameplate before ordering