HIMA F8652E

Description

Product Overview

The HIMA F8652E is a high-integrity digital output module from HIMA’s F 35 and F 87 series of TÜV-certified Safety Instrumented Systems (SIS). Complete technical data for this safety-critical component can be reviewed at the product link. This module is engineered to execute the final element commands from the safety controller, providing a reliable interface to actuators such as solenoid valves, motor contactors, or shutdown valves in emergency scenarios. Unlike standard PLC output cards, the HIMA F8652E is designed with a focus on functional safety, incorporating hardware and diagnostic features that ensure a safe state is maintained even in the presence of internal faults. The architecture of the HIMA F8652E is based on redundant and diverse internal circuits to achieve the high Safety Integrity Level (SIL) ratings required in processes where failure could have severe consequences. Its role is to provide a de-energize-to-trip or energize-to-trip signal with maximum reliability, making the HIMA F8652E a vital last link in the safety chain.

Product Parameters

• System: HIMA F 35 / F 87 Safety System.
• Module Type: Digital Output Module (typically 2-channel or 4-channel).
• Safety Standard: Compliant with IEC 61508 and IEC 61511 for functional safety.
• Safety Integrity Level (SIL): Capable of supporting SIL 3 applications as part of a qualified safety loop.
• Output Type: Typically Electromechanical Relay or Solid-State with diagnostic feedback.
• Contact Configuration & Rating: Often Form C relay contacts (SPDT) with ratings suitable for industrial loads (e.g., 2A @ 230V AC).
• Diagnostic Features: Continuous online diagnostics for circuit integrity, including cross-circuit comparison, stuck-at fault detection, and load circuit monitoring (LCP).
• Response Time: Fast and deterministic, consistent with safety system requirements.
• Redundancy: Supports hardware redundancy (e.g., 1oo2, 2oo2 voting) at the module or channel level when configured within the safety system architecture.
• Communication: Interfaces via the proprietary safe HIMA bus to the central safety CPU.
• Certifications: TÜV-certified for use in safety applications.

Advantages and Key Features

The paramount advantage of the HIMA F8652E is its certified safety architecture. It is not merely a switching device but a fault-tolerant module designed to fail in a predictable, safe manner. Its integrated, continuous diagnostics can detect dangerous failures such as welded relay contacts or open-circuit transistors, signaling the CPU to take appropriate action. The module supports flexible and redundant configurations, allowing safety engineers to design loops that meet specific availability and safety targets. The HIMA F8652E offers high noise immunity and is designed for harsh industrial environments. Its integration with the HIMA safety engineering software (Safety Manager) allows for comprehensive configuration, testing, and documentation of the safety function, which is a regulatory requirement. The proven design and certification of the HIMA F8652E reduce the engineering effort and risk associated with achieving SIL 3 certification for end users.

Application Cases in Industry

The HIMA F8652E is deployed in Safety Instrumented Functions (SIFs) within the most hazardous processes:

• Oil & Gas: Actuating emergency shutdown (ESD) valves on offshore platforms, fire & gas system deluge valves, and turbine overspeed protection.
• Chemical/Petrochemical: Initiating reactor quenching, opening emergency pressure relief systems, and closing main feedstock valves in runaway reaction scenarios.
• Power Generation: Tripping fuel valves on gas turbines (FTV), activating boiler emergency cut-off systems, and managing burner management system (BMS) final elements.
• Pharmaceutical: Executing safety interlocks in exothermic reaction processes.
  In every case, the HIMA F8652E is responsible for carrying out the physical action that brings the process to a safe state, based on the logic solved by the safety controller.

Comparison with Competing Products

Compared to a standard PLC digital output card or even a relay, the HIMA F8652E is in a different class due to its certified safety design, diagnostics, and TÜV approval. It competes directly with safety output modules from other dedicated SIS vendors such as Siemens (S7-400FH F-DO), Triconex (Analog & Digital Output modules), and Yokogawa (ProSafe-RS). A key differentiator for HIMA and modules like the HIMA F8652E is the company’s long-standing specialization in pure safety systems and their specific hardware-based approach to redundancy and diagnostics, which some engineers prefer for the highest integrity applications. Compared to configuring a safety function using standard components, using the HIMA F8652E within its qualified system provides a pre-certified, lower-risk path to achieving the required SIL.

Selection Suggestions and Precautions

1. Safety Loop Design: The HIMA F8652E must be selected and sized as part of a complete SIF designed by a competent safety engineer. This includes calculating the Probability of Failure on Demand (PFD) to meet the target SIL.
2. Load Compatibility: Meticulously verify the load (solenoid, contactor) characteristics (inrush current, holding current, voltage, type) against the module’s specifications. The use of a supervised output module often requires a specific minimum load for proper diagnostics.
3. Configuration & Programming: The module’s behavior (e.g., de-energize-to-trip, pulse testing) must be correctly configured in the HIMA Safety Manager software. This programming is safety-critical and must follow a rigorous validation process.
4. Wiring & Installation: Follow HIMA’s installation guidelines exactly. This includes using supervised wiring techniques where required, proper separation from non-safety cables, and correct grounding. Failure to do so can compromise the safety function.
5. Testing & Proof Testing: The entire SIF, including the HIMA F8652E and its connected actuator, must be subjected to regular proof testing as defined in the Safety Requirements Specification (SRS). The module’s diagnostics support but do not replace periodic functional testing.
6. Spare Parts: Use only genuine, certified HIMA F8652E modules from authorized sources. The use of uncertified or counterfeit parts in a safety system is unacceptable and voids certifications.

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