Description
Product Description
The HIMA F3330 984333002, detailed further here, is a high-integrity digital input module from HIMA’s F 35 Safety PLC system. This specialized module is designed to read signals from safety-critical field devices such as emergency stop buttons, safety gates, pressure mats, and gas detectors. Unlike standard PLC input cards, the primary function of the HIMA F3330 is to provide a certified (up to SIL 3 according to IEC 61508), fault-tolerant interface for these signals, ensuring the highest level of reliability for safety instrumented functions (SIF). The module continuously performs self-diagnostics to detect internal faults, cross-circuit faults, and wiring issues. For safety system engineers and maintenance personnel in high-risk industries, the integrity of modules like the HIMA F3330 984333002 is non-negotiable, as they form the essential sensory layer of a safety instrumented system (SIS). Selecting the correct certified components is paramount for achieving and maintaining the required safety integrity level.
Product Parameters
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Manufacturer: HIMA
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System Family: F 35 / F 35 COMPACT Safety PLC
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Module Type: Digital Input Module (Safe)
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Part Number: 984333002
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Model: F3330
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Number of Channels: Typically 8 or 16 safe digital input channels.
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Input Type: Typically designed for 24V DC (NAMUR) signals. Supports connection of two-wire proximity sensors and contacts with cross-circuit monitoring.
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Diagnostics: Extensive per-channel diagnostics for wire break, short-circuit to ground/supply, and module-internal faults.
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Safety Standards: Complies with IEC 61508 (SIL 3), IEC 61131, and relevant explosion protection standards.
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Communication: Connects to the safety CPU via the proprietary, fail-safe HIMatrix backplane bus.
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Certification: TÜV certified for use in safety applications up to SIL 3.
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Configuration: Configured via HIMA’s Safety Engineering software.
Advantages and Features
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High Safety Integrity (SIL 3): Certified for the highest Safety Integrity Level, making it suitable for the most demanding safety applications in process and machinery safety.
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Advanced Diagnostic Coverage (DC): Provides a very high diagnostic coverage (>99%), which is essential for achieving a high Safe Failure Fraction (SFF) and meeting SIL 3 requirements.
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Cross-Circuit Detection (CCD): Can detect dangerous wiring faults (e.g., short circuits between two independent sensor circuits) that a standard PLC input module would not detect, preventing a latent failure.
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Fault-Tolerant Architecture: Designed with redundancy and self-monitoring at the hardware level to ensure a safe state is reached even in the event of an internal module failure.
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Seamless Integration with HIMA SIS: Perfectly integrated into the HIMA safety PLC architecture, ensuring guaranteed performance and simplified engineering within the proven HIMatrix system.
Application Cases in Application Fields
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Oil & Gas (Offshore Platforms & Refineries): Used to monitor emergency shutdown (ESD) pushbuttons and fire & gas detection system inputs. The HIMA F3330 ensures that a shutdown command is reliably transmitted to the safety logic solver, even in the presence of wiring degradation.
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Chemical and Petrochemical Plants: Interfaces with critical safety devices on reactors and distillation columns, such as high-pressure switches and toxic gas detectors, where failure to detect a signal could lead to a catastrophic event.
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Power Generation (Turbine Overspeed Protection): Reads signals from speed sensors and vibration monitors. The module’s diagnostic capabilities ensure that a failure in the sensor loop itself is detected and reported, preventing a dangerous undetected fault.
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Pharmaceutical (Batch Reactor Safety): Monitors inputs for interlocked access doors and critical temperature/pressure switches during exothermic reactions, ensuring operator and product safety.
Comparisons with Competing Products
Compared to safety I/O modules from other safety PLC manufacturers like Siemens (ET 200SP F-I/O), Rockwell Automation (Guard I/O), or ABB (AC 800M High Integrity), the HIMA F3330 984333002 represents a specialized, high-end approach:
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Dedicated Safety Focus vs. Integrated Systems: HIMA is a pure-play safety specialist. The F3330 is part of a system designed exclusively for SIS, whereas competitors’ modules are often part of a broader automation platform that combines standard and safety control.
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Diagnostic Philosophy: HIMA’s diagnostics, particularly for cross-circuit detection, are often considered industry-leading and are a core part of their certification for very high SIL levels. This can provide a higher theoretical safety performance.
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System Architecture: The HIMA HIMatrix bus is a proprietary, deterministic safety network. Competitors often use open safety protocols over standard fieldbuses (like PROFIsafe over PROFINET). Both are certified, but the philosophies differ.
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Market Niche: HIMA dominates in ultra-high-risk, process safety applications (e.g., burner management, offshore). Competitors have stronger positions in factory automation (SIL 2/PL d,e) or in plants where users standardize on a single vendor for both basic process control and safety.
Selection Suggestions and Precautions
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Mandatory Compliance with Safety Design: The HIMA F3330 must be selected and applied within a safety instrumented system designed according to IEC 61511/ISA 84 (process) or ISO 13849 (machinery) standards. Its use must be justified by a prior hazard and risk analysis.
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Verify Exact Part Number and Firmware: Safety certifications are tied to specific hardware and firmware versions. Ensure the module’s part number (984333002) and firmware revision exactly match those specified in your system’s safety requirements specification (SRS) and TÜV certificates.
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Follow Strict Wiring Practices: Wiring to the F3330 must adhere to the highest standards for safety systems, including segregation from non-safety cables, proper use of intrinsically safe barriers if needed, and meticulous documentation (loop diagrams).
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Use Certified Engineering Tools: Configuration and modification of the module’s parameters must only be done using the certified HIMA Safety Engineering software. Unauthorized changes invalidate the safety certification.
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