Description

The HIMA ELOPII is a high-integrity, fail-safe programmable logic controller (PLC) platform engineered for mission-critical Safety Instrumented Systems (SIS) in hazardous industrial environments. Developed by HIMA Paul Hildebrandt GmbH, a global leader in functional safety automation, the HIMA ELOPII series represents a significant evolution in safety control technology, combining robust hardware architecture with a fully integrated engineering environment to deliver unparalleled reliability, flexibility, and ease of use. As a SIL3-certified system according to IEC 61508 and compliant with ISA 84.01, the HIMA ELOPII is specifically designed to protect people, processes, and assets in industries such as oil & gas, chemical processing, power generation, and renewable energy.

The HIMA ELOPII platform is built on a modular, scalable architecture that supports both compact single-rack configurations and large-scale distributed systems. It features redundant processing units, dual or triple modular redundancy (TMR) options, and hot-swappable I/O modules, ensuring continuous operation even during component failures or maintenance activities. The system operates with HIMA’s proprietary HFT (Hot-Fail-Tolerant) technology, enabling seamless failover without process interruption. Integrated diagnostics, secure communication protocols, and cybersecurity features such as embedded firewalls and role-based access control make the HIMA ELOPII a cornerstone of modern industrial safety infrastructure. Its seamless integration with asset management systems and support for Industry 4.0 initiatives further enhance its value in digital transformation projects.

Technical Specifications

Main Features and Advantages

The HIMA ELOPII delivers exceptional performance and safety assurance through its advanced hardware and software integration. Its TMR architecture ensures that all critical processes are executed in triplicate, with continuous voting to detect and isolate faults in real time, eliminating single points of failure. This makes the HIMA ELOPII ideal for Emergency Shutdown (ESD), Fire & Gas (F&G), and Turbine Protection Systems (TPS) where reliability is non-negotiable.

A standout feature of the HIMA ELOPII is its unified engineering platform, HIMA HISC, which streamlines configuration, diagnostics, and lifecycle management. Unlike legacy systems requiring multiple tools, the HIMA ELOPII allows engineers to program, simulate, and commission safety logic within a single environment, significantly reducing engineering time and error rates. The platform supports seamless integration with DCS and enterprise systems via OPC UA and Ethernet/IP, enabling data exchange for predictive maintenance and performance analytics.

Cybersecurity is deeply embedded in the HIMA ELOPII design, featuring secure boot, encrypted firmware updates, and compliance with IEC 62443 standards. Its open architecture allows integration with third-party devices while maintaining safety integrity. The HIMA ELOPII also supports hot-swapping of I/O and power modules, minimizing downtime during maintenance. With its future-proof design, long lifecycle support, and compatibility with HIMA’s cloud-based monitoring solutions, the HIMA ELOPII offers a sustainable, cost-effective solution for modern safety automation.

Application Field

The HIMA ELOPII is deployed across a wide range of high-risk industrial sectors where functional safety is paramount. In upstream and midstream oil & gas facilities, it serves as the core logic solver for ESD and F&G systems, protecting wellheads, pipelines, and compressor stations from overpressure, leaks, and ignition hazards. In chemical and petrochemical plants, the HIMA ELOPII manages reactor safety interlocks, batch sequencing, and toxic gas detection, ensuring compliance with process safety management (PSM) regulations.

In power generation, particularly in combined cycle and hydrogen-ready plants, the HIMA ELOPII provides turbine overspeed protection, burner management, and boiler control safety functions. Offshore platforms and FPSOs (Floating Production Storage and Offloading units) rely on the HIMA ELOPII for its ruggedized design and redundancy capabilities in harsh marine environments. The platform is also increasingly used in renewable energy applications, such as hydrogen production and carbon capture systems, where high-pressure gas handling demands SIL3-rated controls.

Additionally, the HIMA ELOPII supports digitalization initiatives by feeding real-time safety data into asset performance management (APM) systems, enabling predictive maintenance and operational optimization. Its scalability makes it suitable for both greenfield projects and brownfield retrofits, where it can replace obsolete safety relays or legacy PLCs with a modern, cyber-secure platform. By delivering unmatched reliability, interoperability, and lifecycle support, the HIMA ELOPII ensures operational safety and regulatory compliance across the most demanding industrial landscapes.

Related Products

HIMA FM800: High-performance safety controller often used in conjunction with HIMA ELOPII for hybrid control architectures.
HIMA H41q: SIL3-certified TMR controller platform that can be integrated with HIMA ELOPII systems for expanded I/O or legacy support.
HIMA PACSystems RX3i: Hybrid safety and process control solution that shares engineering tools with HIMA ELOPII.
HIMA ProSad: Legacy safety system that can be upgraded to HIMA ELOPII with migration toolkits and compatibility modules.
HIMA HISC Workbench: Engineering software suite used to program, simulate, and commission the HIMA ELOPII platform.
HIMA SCOUT: Asset monitoring and diagnostics tool that interfaces with HIMA ELOPII for predictive maintenance.
HIMA SIL4E: High-availability logic solver for extreme safety applications, complementing HIMA ELOPII in multi-tiered safety architectures.
HIMA CIP Security Module: Add-on security appliance that enhances the HIMA ELOPII’s native cybersecurity features for NERC CIP compliance.
HIMA I/O Modules (e.g., HI4021, HI5154): Field-compatible digital and analog I/O cards designed for use in HIMA ELOPII chassis.
HIMA Cloud Connect: Secure gateway that enables remote monitoring and firmware updates for HIMA ELOPII systems via cloud platforms.

ELOPII HIMA

Installation and Maintenance

Pre-installation preparation: Before installing the HIMA ELOPII, ensure the control panel meets environmental specifications, including ambient temperature, humidity, and ingress protection (IP) ratings. Verify that the power supply is stable and within the 24 VDC or 120/230 VAC range, depending on the module type. Confirm that all network cabling (Ethernet, PROFIBUS, etc.) is shielded and terminated correctly to prevent EMI. Use ESD-safe procedures when handling CPU and I/O modules. Import the project configuration into HIMA HISC Workbench and validate firmware compatibility before powering up the HIMA ELOPII system.

Maintenance recommendations: Perform regular diagnostics using HIMA SCOUT or the built-in web interface to monitor CPU load, communication status, and module health. Check event logs monthly for fault indications or near-miss alarms. Clean air filters and ventilation paths quarterly in dusty environments to prevent overheating. Update firmware only after thorough testing in a simulation environment and with proper change management procedures. The HIMA ELOPII supports online diagnostics and remote access, enabling predictive maintenance and minimizing unplanned outages. Replace failed modules using hot-swap procedures to maintain system availability.