Intrinsic safety barriers are the core of Pepperl+Fuchs' product portfolio. We offer the widest selection of products for protection of electrical signals located in hazardous areas. These intrinsic safety modules combine the energy limiting features of a zener barrier with galvanic isolation. Pepperl+Fuchs offers systems for different applications and mountings.
K-System
Our most popular intrinsic safety isolated barriers are the flexible DIN rail mounted K-System modules. The K-System intrinsic safety barriers connect easily with our power rail assembled in the DIN rail. The use of the power rail reduces the wiring by energizing the modules mounted on the DIN rail.
H-System
The intrinsic safety isolated barriers of the H-System are mounted on termination boards. This innovative product is ideal for applications requiring tight DCS or system integration.
E-System
For rack mounted isolated barriers, Pepperl+Fuchs offers a wide range of Eurocards in the E-System. You can choose between 3 variations of Eurocards.
CR-System
The isolated safety barriers of the CR-Systems are mounted on the DIN-Rail. For new installations we recommend to use our K-System isolated barriers.
WE-System
The WE-System isolated switch amplifiers provide power to NAMUR proximity sensors or dry contacts located in hazardous environments. The units can be installed onto a DIN-Rail or by mounting them with screws through holes in the base. For new installations we recommend to use our K-System isolated barriers.

Zener barriers – cost saving and easy mounting Ex-protection - Pepperl+Fuchs

Zener barriers provide cost saving Ex-protection for various applications in process automation systems. The amount of energy transferred to the hazardous location is limited to a safe level incapable of igniting the explosive atmosphere. Pepperl+Fuchs offers a wide product portfolio of housing and connection styles, which include DIN rail, termination board mounted, and accessories for each application.
Zener barriers have to be connected to an IS ground.
The IS grounding can be realized several ways:

• Isolated from the DIN- Rail
• Via an isolated DIN-Rail
• Via DIN-Rail

Field replaceable fuses provide a convenient means of disconnecting or open-circuiting the instrument loop without interfering with the wiring, making commissioning and maintenance operations much easier.
Z-System
The zener barriers of the Z-System are DIN-Rail mountable. Utilizing the DIN rail, the IS grounding is made possible without additional wiring efforts.
SB-System
This system consists of single SB-terminal bases or multi-sockets (SB-termination board) where the zener barriers (SB-barriers) are plugged in. The complete system is mounted on a 35mm DIN Rail.

What are signal conditioners?

With the variety of process control systems available, it is often necessary to convert an input signal into a format that the system will accept. Signal conditioners take signals from an assortment of field instruments such as thermocouples and RTDs, and convert those signals into any of several standard instrument signals (1…5V, 4…20 mA, etc.).

Signal conditioners are also beneficial to the accurate transfer of these signals, isolation and the elimination of ground loops.

The K-System

The K-System guarantees a reliable and economical signal transmission between your field devices and the control system. Whether your plans include a single isolating module or a large scale system integration, application-oriented solutions characterize the entire K-System product range. The K-System modules are DIN-Rail mounted and can be powered by using the Power Rail.

Power Rail System

The Power Rail System allows a simple snap-in of the interface modules on the DIN-Rail. The power supply and monitoring of lead errors will be transferred with reliable, gold-plated rails. Benefits include reduced wiring, fewer connections and simplified expansions in the future.

FieldConnex® - Always the right choice

FOUNDATION fieldbus H1 and PROFIBUS PA link field instrumentation to any process plant. Fieldbus provides seamless data communication between the plant and control system while supplying power to all field devices.
Fieldbus topologies fit the demands of modern process industries. The High-Power Trunk approach provides plenty of energy and the flexibility you expect for your process. Make the High-Power Trunk your choice of fieldbus technology for FOUNDATION fieldbus H1 and PROFIBUS PA

• Robust power supplies and reliable fieldbus installation technology
• Advanced Diagnostics for comprehensive performance monitoring
• Well-tuned protection concepts for any explosion hazardous area

Safety is not an issue and stability is ensured.


FieldConnex is fieldbus connectivity. From power supplies to fieldbus terminators to fieldbus barriers – let our experience deliver reliable, valuable, and cost-effective products to you. Long component service life protects your investment and increases the efficiency of your application.

Our modular Remote I/O systems - RPI, LB and FB - are the cost-effective connection of your field signals in the hazardous and the safe areas to your process control system via the fieldbus. A variety of gateways are available for the connection to different fieldbusses. Free combinable I/O modules and high modularity offers cost-saving installations. The systems are characterized by high functionality and simple handling.
FB Remote I/O for Zone 1
FB Remote I/O stations are mounted in hazardous areas Zone 1 or Zone 21. They form a modular signal conditioning system to interface signals from the field with a control system in the safe area.
LB Remote I/O for the safe area and Zone 2
LB Remote I/O stations are mounted in hazardous areas Zone 2 or Zone 22 or in the safe area. They form a modular signal conditioning system to interface signals from the field with a control system in the safe area.
RPI - Remote Process Interface for control room and Zone 2
RPI connects your conventional sensors and actuators with your process control system via a single fieldbus connection.

HART Interface Solutions from Pepperl+Fuchs consist of two HART Multiplexer Systems for multiple signal loops and a HART Loop Converter for single loop applications. The Multiplexer is used to connect HART field devices to Asset Management Systems like AMS™ Suite: Intelligent Device Mananger from Emerson Process Management. At the heart of HART Interface Solution (HIS), the HART Multiplexer acts like a gateway device, routing communications between the maintenance workstation PC and the HART field devices.

It interrogates each HART device, retrieves device information, and stores it in an internal database. This information is made available by the AMS Device Manager or PACTware. The HART Multiplexer also acts as a message coordinator for communication between the maintenance workstation PC and the HART devices. For a single loop solution, the HART Loop Converter allows access to all process variables provided by a field device and transfers them to conventional 4...20 mA loop. This enables it to make use of the hidden measurements done by many field devices and feed them to conventional DCS Systems.
K-System HIS
HART Interface Solution modules with the form factor of the well-known K-System Intrinsic Safety Barriers.
H-System HIS
HART Interface Solution based on termination board technology.

Today, level measurement technology is the basis for management and process control in the chemical, petrochemical, environmental and other related industries.
Our comprehensive program enables us to help you solve your particular measurement and control problems and to detect the precise level of any medium, under a wide range of conditions.
Limit detection
Protect your application from overflow or dry-running…
Continuous measurement
Detect the current filling level of the medium at all times …

Pepperl+Fuchs Bebco EPS Purge/ Pressurization products offer a safe and economical approach to installing electrical equipment in hazardous locations. By creating a safe area inside a standard enclosure, general-purpose equipment can be used in hazardous (classified) areas.

With Bebco EPS Purging/ Pressurization components and accessories:

• General-purpose equipment can be installed in the protected enclosure and used safely in the hazardous area.
• Flammable gas collected inside the enclosure is removed and the accumulation of gases or ignitable dust within the pressurized enclosure is prevented.

One of the best benefits of purging / pressurization is use of the standard Type 4/12 enclosure as the protected enclosure. This saves money, weight and space over explosion proof methods.

Pepperl+Fuchs offers a full range of purge and pressurization equipment to meet the needs of your application. The Pepperl+Fuchs Systems and Solutions group can also design custom enclosure solutions to meet your specifications.
Type X Bebco EPS Purge System
Our Bebco EPS Type X purge system reduces the classification within the protected enclosures from Division 1 to non-hazardous. General-purpose equipment can be operated within the protected enclosure.
Ex px Purge System
Our Bebco EPS Ex px purge system reduces the classification within the protected enclosure from Zone 1/ Zone 21 to non-hazardous. General-purpose equipment can be operated within the protected enclosure.
Type Y Purge System
Our Bebco EPS Type Y purging system reduces the classification within the protected enclosure from Division 1 to Division 2. All equipment used within the enclosure must be Division 2 rated.
Type Z Purge System
Our Bebco EPS Type Z purge system reduces the classification within the protected enclosure from Division 2 to non-hazardous. General-purpose equipment can be operated within the protected enclosure.
Ex pz Purge System
Ex pz purge systems reduce the classification within the protected enclosure from Zone 2 to non-hazardous. General-purpose equipment can be operated within the protected enclosure.
Enviro-Line Pressurization System
Enviro-Line purging units is an enclosure pressurization system for non hazardous areas that operates on a supply of compressed instrument air or inert gas. It regulates and monitors the pressure within the sealed enclosure in order to prevent the accumulation of damaging and caustic gases and dusts.

Pepperl+Fuchs offers a wide range of visualization and HMI solutions - from operator workstations like Panel PCs, Remote Monitors or industrial monitors to compact, high-performance operator panels. Our HMI solutions are rugged, industrial products designed for hazardous areas and heavy-duty use as well as for cleanroom and GMP-related applications. The product range includes a full complement of accessory components for customized solutions.
Operator Workstations and Monitors
Pepperl+Fuchs offers a wide variety of industrial operator workstations and industrial monitors for hazardous areas.
Operator Panels
Our TERMEX family of operator panels for safe and hazardous areas, with text or graphics display, allow flexible operator control and monitoring of machines and processes.
Peripherals
A large selection of peripheral equipment complements our VisuNet industrial operator workstations and TERMEX operator panels. Industrial keyboards, barcode readers, network components, power supplies and mobile HMI solutions are available.

CorrTran MV is the first 2-wire, 4mA … 20mA HART transmitter that evaluates general corrosion and localized (pitting) corrosion, as well as conductivity, in real-time. Meant to take corrosion control out of the laboratory and into everyday process control, CorrTran MV is a revolutionary approach to corrosion detection and corrosion prevention. Unlike the traditional corrosion coupon method that established an average corrosion rate over time, CorrTran MV can monitor corrosion on-line and in real-time rather than in a historical analysis method that misses the possibility of a process to corrosion correlation.
CorrTran MV gives plant operators the ability to monitor corrosion rates within their existing software and control system like any other process variable (i.e., pressure, flow, level, temperature, pH). Since CorrTran MV has a standard 4-20 mA output, it can be easily integrated into a new or legacy system architecture. Using the CorrTran MV corrosion monitoring device, you will be able to see physical changes online and in real-time so process changes or planned maintenance is more effective.
With a wide range of mechanical configurations available for both standard and hazardous locations, CorrTran MV takes corrosion monitoring to a new level – one that makes corrosion data readily available to the process engineer so decisions can be made in real-time and according to current process conditions. Analysis of this data can lead to effective corrosion prevention.

An alarm system is used in the separator to detect the volume of the light liquid and/or the maximum level of a liquid. This ensures the safe and economic operation of separators for light liquids, also known as oil and petrol separators. The requirements for this type of separator systems has been defined in the European standard EN 858-1. It is a condition for the CE mark and defines the criteria for a device raising an alarm if the light liquid or liquid waste level is too high or the liquid waste level is too low.
The alarm system and the sensors guarantee an increased level of safety, simple installation, and an application-oriented monitoring of oil and petrol separators. The signalling of alarms can be acoustic, visual, transmitted remotely via potential-free relay contacts or via SMS. The sensors of the alarm systems are approved for use in explosive areas of zone 0.
Below please find our product portfolio for these applications:
Standard alarm system
The standard alarm system LAL-SRW is used for the monitoring of oil or petrol separation plants. The oil layer thickness, liquid level or sludge level can be monitored Via two sensors.
Standard alarm system as a set
The efficient solution for everyone wanting to install a complete alarm system for oil or petrol separation plants! The standard alarm system set is offered in three different versions.
Alarm system with SMS alarms
The alarm system with SMS alarms permits the reliable remote monitoring of oil or petrol separation plants. This alarm system allows alarms to be sent via SMS to three different mobile phones.
Alarm system for tanks
The intrinsically safe alarm system NV05-11 is used for monitoring of containers and fuel tanks
Alarm system for fat separators
The NVD-11 alarm system for fat separators monitors fat or grease layer thickness. The alarm system signals when the maximum level of a fat layer is reached, indicating that the fat separator has to be emptied.
Accessories
Accessories for simple and effective installation of sensors.

Enclosures, Control and Power Distribution Cabinets and Equipment for Hazardous Areas

Pepperl+Fuchs offers a huge variety of installation equipment for hazardous areas. The products are based around high quality enclosures in the increased safety, intrinsic safety and flameproof protection classes. The range provides several different options of enclosure dependant upon the project application and specification required, with a variety of sizes and materials available including stainless and mild steel, as well as glass reinforced polyester (GRP). In addition, the product range also include a wide range of lighting, signalling and emergency shutdown alarm equipment, as well as various installation accessories.
Many years of experience enable our project engineers to tailor cabinets and control panels exactly to meet the requirements of the individual application. All enclosures can be configured with the well-proven explosion protection products of Pepperl+Fuchs, from conventional intrinsic safety barriers and remote I/O systems through to the modern FieldConnex fieldbus infrastructure components.
Custom Cabinets
A wide range of cabinet sizes and materials allow to combine all Pepperl+Fuchs interface products as well as other brands to a complete, fully engineered project solution exactely tailored to your application.
Fieldbus Junction Boxes
Learn more about our distribution enclosures for fieldbus networks, equipped with FieldConnex Infrastructure Modules exactly to meet your requirements.
Remote I/O Enclosures
The Remote I/O Systems LB, FB or RPI can be configured exactly to your needs and will be shipped to your plant completely installed in enclosures of various sizes and materials.
Terminal Junction Boxes
With various types, materials and sizes our Terminal Junction Boxes offering covers a wide range of protection concepts. They come with proven entry devices and allow to customize entry pattern and configuration exactly to your specifications.
Control Units
Local control units for machinery as well as control panel solutions for controlling more complex applications are available in various designs and protection concepts. Learn more about the details.
Power+Motor Switching
Switch disconnectors and various starters, complemented by a sizable choice of enclosures, allow you the safe operation of engines and drives in hazardous areas.
Lighting+Signalling
Lighting fixtures for all hazardous areas include fluorescent and high-intensity discharge fittings. Rugged manual call points allow the control of fire and gas alarm systems. Find out more.

Power supplies for hazardous areas

Pepperl+Fuchs understands the need for reliable power in hazardous areas. Our power supplies meet the most demanding requirements for today's process control applications, and help to enhance system integrity. Our power supplies are well suited for emergency shut down and mission critical applications to fieldbus and analog networks including HART communication.
PS Industrial Power Supplies
The enhanced PS3500 power supplies provide N+1 redundancy, high immunity, and industry-leading efficiency for demanding industrial environments.
K-System Power Supplies
Our K-system din rail power supplies convert a 120VAC or 240VAC input to 24VDC, and can be used in combination with power feed modules.
Fieldbus Power Supplies
FieldConnex® is the right infrastructure system to connect fieldbus devices. Efficient by design, our reliable Fieldbus Power Supplies provide ease of use and durability. Power Hub is a motherboard-based power supply system for one to four FOUNDATION Fieldbus H1 or PROFIBUS PA segments.