Triconex and Pepperl+Fuchs security solutions

New benchmark for industrial automation safety: perfect integration of Pepperl+Fuchs H-System and Schneider Electric Tricon CX

In today's highly complex industrial process automation field, the reliability and effectiveness of Safety Instrumented Systems (SIS) are the cornerstone of ensuring personnel safety, environmental protection, and production continuity. As a digital transformation expert in global energy management and automation, Schneider Electric has launched the EcoStruxure Triconex Tricon CX system, which has become the preferred platform for emergency shutdown (ESD) and critical process control due to its powerful triple redundancy technology (TMR) and high availability. In order to further enhance the application efficiency of this system in hazardous areas, Pepperl+Fuchs, as a global leader in explosion-proof technology, has worked with Schneider Electric for more than 30 years to jointly create the H-System intrinsic safety solution for Tricon CX. This article will explore in detail the crystallization of this technological collaboration, analyzing how it redefines the standards for industrial intrinsic safety barriers through high-density design, plug and play technology, and excellent safety levels.

Strategic partnership and industry background

The cooperation between Schneider Electric and Pepperl+Fuchs is not overnight, but based on more than 30 years of technological trust and market integration. As an important part of Schneider Electric's Technology Partner Program (TPP), Pepperl+Fuchs has been committed to providing comprehensive automation solutions for the EcoStruxure architecture and process automation industry. This deep partnership ensures seamless integration of both parties' products, from the physical connection of underlying hardware to the communication protocol of upper level systems, all of which have undergone the strictest testing and verification.

As a new generation safety system launched by Schneider Electric, the Tricon CX inherits the high reliability tradition of the Triconex series while placing higher demands on the compactness, heat dissipation efficiency, and installation convenience of the I/O subsystem. Especially in industries such as oil, natural gas, and chemical where explosive gases exist, how to equip Tricon CX with intrinsic safety barriers that not only save space but also meet the highest safety standards has become a key challenge in engineering implementation. Pepperl+Fuchs' H-System was born in this context. It is not only a hardware product, but also a fully tested, globally certified, and officially recognized "preferred solution" by Schneider Electric.

Redefine Terminal Board Technology and H-System Architecture

Traditional DCS or ESD systems often face problems such as complex wiring, large space occupation, and difficult heat dissipation when connecting intrinsically safe field devices. Pepperl+Fuchs' H-System has completely changed this situation through a series of innovative designs.

1. Ultimate space saving and high-density design

In modern industrial sites where every inch of land is precious, the cost of space is extremely high. One of the core advantages of H-System is its ultra narrow modular design. According to the documentation, the width of its HiC module is only 12.5 millimeters, which is currently one of the highest density intrinsic safety isolation barrier solutions on the market. This compact design means that more signal channels can be accommodated in terminal cabinets of the same area, significantly reducing the number and footprint of control cabinets and lowering infrastructure costs.

2. Unique plug-in installation mechanism

H-System has introduced the installation concept of "Plug&Lock". HiC modules can be directly plugged into customized terminal boards without the need for any tools or additional wiring operations. This design not only greatly accelerates the installation speed of the project, but also reduces the risk of human wiring errors. When a module needs maintenance or replacement, engineers can quickly unplug the faulty module and insert a new one without dismantling the on-site wiring, minimizing the mean time to repair (MTTR).

3. Customized terminal board solution

Pepperl+Fuchs provides highly customized terminal boards for the special interface requirements of the Tricon CX system. These terminal boards integrate intrinsically safe wiring terminals and are equipped with Schneider Electric specific ELCO or D-Sub plug connectors. By using pre wired system cables from the Tricon system, this design achieves seamless connection from on-site terminals to I/O cards, not only maximizing cabinet layout but also simplifying spare parts management and planning through standardized design.

4. Low power consumption and heat dissipation optimization

High density installation often comes with heat dissipation pressure. The H-System module adopts advanced low-power design, which effectively reduces heat dissipation while ensuring signal isolation and transmission performance. This not only helps to maintain a low temperature environment inside the control cabinet, extend the service life of electronic components, but also reduces the dependence on cabinet air conditioning or cooling fans, in line with the modern industrial concept of green energy conservation.

In depth analysis of Tricon CX I/O channel and intrinsic safety module configuration

In order to meet the needs of different application scenarios, Pepperl+Fuchs provides highly compatible H-System module and terminal board solutions for various I/O cards of Tricon CX. The following will provide a detailed breakdown of the configuration details for each signal type.

1. Digital Input (DI) Solution

For the digital input card 3506X (32 channels) of Tricon CX, H-System offers a variety of isolation barrier module options.

HiC2821 and HiC2841: These two modules correspond to a single channel design and are typically used to achieve single loop integrity. They support relay output and transistor output respectively, with a safety integrity level of SIL 2. Among them, HiC2841, as a transistor output version, has a faster response speed.

HIC2822 and HIC2842: In order to pursue higher density, these two modules adopt a dual channel design. This means that two intrinsic safety circuits are integrated within a width of 12.5mm, greatly saving cabinet space. They also support both relay and transistor output modes, with a safety level of SIL 2.

Matching terminal board: mainly using HICTB16-TRX-RAC-PL-DI16 or HICTB16-TRX-RAC-PL-DI32, the former supports 16 channels, and the latter expands to 32 channels through dual channel modules, perfectly matching the capacity of 3506X card.

2. Digital Output (DO) and High Level Safety Requirements

Digital output is usually used to drive actuators such as solenoid valves and alarm lights, and its safety is directly related to the reliability of emergency parking. H-System provides high-performance modules with SIL 3 certification for the 3626X (32 channel) card of Tricon CX.

HiC2871A: This is an output module that can provide 40mA @ 12VDC driving capability and has the ability to test pulse anti-interference. In the ESD system, the controller sends small test pulses to the output circuit to detect line faults. This module can effectively resist the false triggering of the actuator by these pulses and ensure the implementation of diagnostic functions.

HiC2873 and HiC2883: The driving capability of these two modules has been increased to 45mA @ 12VDC. Among them, HiC2883 has also added Line Fault Testing (LFT) function, which can monitor circuit disconnection or short circuit faults in real time, further improving the diagnostic coverage of the system.

Safety Relay Module: For non intrinsic safety applications or scenarios that require direct driving of high-power loads, HIC5861 (Safety Relay DTS) and HIC5863 (Safety Relay ETS) provide SIL 3 level solutions. DTS may refer to diagnostic testing system related characteristics, while ETS typically refers to emergency trip system characteristics, which ensure absolute safety at the final component level.

Matching terminal board: using HICTB16-TRX-RAC-PL-DO16, supporting 16 channel configuration, and can achieve complete 32 point control with 3626X card.

3. Analog input (AI) and specialized solution for fire detection

Accurate acquisition of analog signals is crucial in process control. H-System provides flexible configuration for 3722X/3723X (32 channel) analog input cards.

HiC2025 series: This is a standard analog input isolation barrier that supports the HART communication protocol and can isolate and transmit 4-20mA signals from the field to the control system. The HiC2025ES version has passed more rigorous testing and reached SIL 3 level, suitable for monitoring critical process parameters.

HIC2025A: This is a special module designed specifically for fire detectors. Fire detectors, especially flame detectors, often require a larger current than ordinary transmitters when triggering an alarm (document shows I=93mA). HIC2025A can provide this special power supply characteristic to ensure that the detector can work properly in emergency fire situations. Its safety level is also SIL 2.

Matching terminal board: HICTB16-TRX-RAC-PL-AI16 is a standard matching terminal board, also designed with 16 channels.

4. Temperature Input (TI) Solution

Temperature is one of the most critical parameters in chemical and refining processes. The HiC2081 module provided by H-System is designed specifically for connecting thermal resistors or thermocouples, capable of accurately converting and transmitting temperature signals to the Tricon CX system. This module also reaches SIL 2 level and is used in conjunction with the HICTB16-TRX-RAC-PL-AI16 terminal board to ensure the safety and accuracy of the temperature monitoring circuit.

5. Analog Output (AO) Solution

For the 3809X/3809AX (16 channel) analog output card, H-System provides HiC2031 and its SIL 3 version HIC2031ES. These modules are used to control analog actuators such as control valves, and their high-precision signal output and fast response characteristics ensure the stability of process control. The matching terminal board is HICTB16-TRX-RAC-PL-IO16.

6. Highly integrated Universal I/O

The 3902X/3902AX (16 channel) universal card of Tricon CX represents the development direction of future I/O technology - configuring multiple signals through one type of hardware. H-System provides an extremely rich combination of modules for this purpose, allowing different functional modules to be mixed on the same terminal board (HICTB16-TRX-RAC-PL-IO16).

Core module: HiC2441 is known as the "universal" module, which can be configured as AI, AO, DI or DO, greatly simplifying engineering design and spare parts inventory.

Segmented functional modules: In addition, the system also supports mixing specific specialized modules (such as HIC2025 for AI, HIC2031 for AO, HIC2821 for DI, etc.) onto the universal terminal board. This flexibility allows engineers to define and adjust I/O types in the shortest possible time based on actual on-site needs, making it a powerful tool for responding to project changes.

Safety Integrity Level (SIL) and Global Certification

In the field of functional safety, the IEC 61508 standard defines four safety integrity levels (SIL). Pepperl+Fuchs' H-System provides a solution for Tricon CX that covers a wide range of SIL 2 and SIL 3 application requirements.

SIL 2 applications: Most analog inputs, digital inputs, and non critical circuits typically use SIL 2 certified modules, which already meet the safety requirements of the vast majority of process industries.

SIL 3 application: For critical interlock circuits in emergency shutdown (ESD), such as final component control, critical safety interlock inputs, etc., H-System provides SIL 3 modules certified by authoritative organizations such as T Ü V (such as HIC2025ES, HIC2031ES, HIC2883, etc.). These modules meet the highest standards in terms of hardware fault margin and diagnostic coverage, ensuring that the system can still operate safely in the event of a single fault.

H-System is one of the most thoroughly tested and documented intrinsic safety solutions on the market. This not only means that the product itself meets the standards, but also that Pepperl+Fuchs can provide detailed safety manuals, SIL calculation certificates, and Failure Mode Data (FMEDA), greatly reducing the workload of end users in the SIL Verification stage. In addition, the system has obtained major global explosion-proof certifications including ATEX, IECEx, FM, etc., truly achieving "one solution, globally applicable".

Configuration tools and ecosystem support

To assist engineers in quickly selecting and generating accurate technical documentation, Pepperl+Fuchs provides a powerful online configurator. By accessing the portal website, users can automatically match the optimal H-System module and terminal board combination based on the specific I/O card model and signal type of Tricon CX. This tool not only improves selection efficiency, but also generates relevant order numbers and technical parameters, reducing human errors.

In addition to intrinsically safe isolation barriers for Tricon CX, Pepperl+Fuchs, as Schneider Electric's main supplier, also offers a range of seamless product combinations, including:

Bus system: FOUNDATION Fieldbus, PROFIBUS PA solution.

HART multiplexer: enables efficient integration of multiple HART smart instruments.

Signal conditioner: used for signal isolation and conversion in non intrinsic safety environments.

Special HMI solution: an operating interface that adapts to harsh environments.

Mobile devices and blowing systems: further improving the overall solution for hazardous areas.

Conclusion: Reshaping the Future Security Architecture

The combination of Pepperl+Fuchs' H-System and Schneider Electric EcoStruxure Triconex Tricon CX is not just a simple combination of two products, but a deep integration of technology and safety concepts in the field of industrial automation. Through the ultimate space saving brought by the 12.5mm ultra narrow module, the installation convenience brought by Plug&Lock, and the specialized module design for different SIL levels, this joint solution successfully solves the triple pressure of cost, space, and safety faced by modern industrial projects.

From digital I/O to complex universal I/O applications, from standard analog processing to special fire detector integration, H-System demonstrates extremely high adaptability and professionalism. With the advancement of Industry 4.0 and digital transformation, this high-density, intelligent, and rigorously certified integrated solution will become the standard paradigm for building future security systems in the process automation industry. For engineering companies that pursue excellent operations and intrinsic safety, choosing this proven partner combination is undoubtedly the best guarantee for success.

Model Supplement

1、 Tricon CX I/O card model (Schneider Electric)

3506X (32 channels, digital input)

3626X (32 channels, digital output)

3722X/3723X (32 channels, analog input/temperature input)

3809X/3809AX (16 channels, analog output)

3902X/3902AX (16 channels, universal input/output)

2、 Pepperl+Fuchs HiC module model

(1) Digital input module

HiC2821 (1 channel, relay output, SIL 2）

HiC2841 (1 channel, transistor output, SIL 2）

HiC2822 (2-channel, relay output, SIL 2）

HiC2842 (2-channel, transistor output, SIL 2）

(2) Digital output module

HiC2871A (1 channel, 40mA @ 12VDC, resistant to test pulses, SIL 3）

HiC2873 (1 channel, 45mA @ 12VDC, resistant to test pulses, SIL 3）

HiC2883 (1 channel, 45mA @ 12VDC, anti test pulse+LFT, SIL 3)

HIC5861 (1-channel, safety relay DTS, non intrinsic safety), SIL 3）

HIC5863 (1-channel, safety relay ETS, non intrinsic safety, SIL 3）

(3) Analog input module

HiC2025 (1 channel, SIL 2）

HiC2025Y1 (1 channel, SIL 2）

HIC2025A (1-channel, dedicated for fire detectors, I ₀=93mA, SIL 2)

HIC2025ES (1 channel, SIL 3）

(4) Temperature input module

HiC2081 (1 channel, SIL 2）

(5) Analog output module

HiC2031 (1 channel, SIL 2）

HIC2031ES (1 channel, SIL 3）

(6) Universal input/output module

HiC2441 (1 channel, supports AI/AO/DI/DO, SIL 2)

HiC2831R4 (1 channel, DI transistor output+LFT, SIL 2)

HiC2853R4 (1 channel, DI transistor output+LFT, SIL 3)

3、 Pepperl+Fuchs terminal board model

HICTB16-TRX-RAC-PL-DI16 (16 channels, digital input)

HiCTB16-TRX-RAC-PL-DI32 (32 channels, digital input)

HICTB16-TRX-RAC-PL-DO16 (16 channels, digital output)

HICTB16-TRX-RAC-PL-AI16 (16 channels, analog input/temperature input)

HICTB16-TRX-RAC-PL-IO16 (16 channels, analog output/universal I/O)