Product Overview

The HIMA F3238 is a high-integrity 8-channel digital input module engineered for safety-critical acquisition in industrial automation. Serving as a fundamental component of the HIMatrix and HIQuad series, this module is designed to monitor field sensors with extreme precision and reliability. It provides galvanic isolation for each of its eight channels, protecting the central logic solver from field-side electrical transients and ground loops.

This module is specialized for processing signals from high-reliability sensors, including NAMUR proximity switches, P+F sensors, and safety-related limit switches (LS/LB). With its SIL 3 certification, the F3238 is an essential building block for Safety Instrumented Systems (SIS) where failure-to-safety is the only acceptable outcome. It is frequently deployed in Emergency Shutdown (ESD) systems and machinery protection circuits within the oil and gas, chemical, and energy sectors.

Technical Characteristics

• Channel Count: 8 independent safety-related digital inputs

• Sensor Compatibility: NAMUR (DIN EN 60947-5-6), proximity switches, and mechanical limit switches

• Safety Integrity: Certified up to SIL 3 according to IEC 61508

• Isolation: Full galvanic isolation per channel; Isolation voltage (Um) of 40V

• Power Supply: 24V DC nominal (-15% / +20% tolerance, up to 30V maximum)

• Internal Logic Voltage: 5V DC (±10% tolerance)

• Hazardous Area Support: Suitable for (Ex)i intrinsic safety applications when used with appropriate barriers

• Thermal Performance: Operating range from 0°C to +60°C

• Redundancy: Supports dual-channel redundant configurations for increased availability

• Physical Dimensions: 4 x 19 x 12.8 cm

• Weight: 0.3 kg

• Manufacturing Origin: Germany

Functional Reliability and Diagnostics

The F3238 is distinguished by its comprehensive diagnostic suite. The module continuously monitors for wire-breakage and short-circuit conditions on the sensor lines, ensuring that the safety controller is always aware of the loop's physical integrity. This proactive fault detection allows for rapid maintenance and prevents "blind" failures in critical protection circuits.

Because it is optimized for high-demand environments, the F3238 features robust electromagnetic immunity (EMC), ensuring signal stability in areas with heavy electrical noise. The module's compact form factor allows for efficient density within standard HIMA subracks. Whether utilized in a centralized DCS or a distributed safety network via safeethernet, the F3238 delivers the deterministic timing and fail-safe performance required to safeguard personnel, equipment, and the environment.