Zener barrier - for explosive environments

One Zenerbarriere Effectively prevents an ignition, for example, by spark by limiting the excess energy in their own -safe circuits and derives to earth. Take care of Seikom Electronic with a zener barrier safe jobs for production processes, mining and many other environments. With us you trust in "Made in Germany“. Feel free to convince yourself of our products and have an individual offer.

Expertise for zener barriers for over 30 years

We have been standing for over 30 years from Seikom Electronic for tailor -made solutions for demanding environments. In the area of ​​innovative Measurement and control technology we are confirmed by our consistent TÜV Nord Quality assurance and ongoing optimizations have become one of the leading providers in the industry. At Seikom Electronic you will find an extensive portfolio of measurement and control technology with functional security such as Safety Integrity Level (Sil) and for ExplOsion -prone areas (ATEX & IECEX). Our devices are developed for temperature measurements with temperature sensors, pressure measurements with Pressure transmers, Air quality sensors, HLK systems and much more. In addition, we have already equipped many of our ex-protected devices with zener barriers in the scope of delivery so that they can fully rely on a safe application.

In addition to our advanced developments, we attach great importance to one professional service, individual advice and a high degree of speed. If you have separate requirements for a zener barrier in the ex-area, we are happy to take care of it.

What makes a security barrier so important?

Zener barriers are important wherever electrical devices are used and that risk If there is that sparking to high current strengths in a potentially explosive atmosphere could cause an ignition. The Safety device Limits the amount of masonry energy in a separate -safe circuit by reducing the voltage to a safe level and ensuring that it remains below the level. For this purpose, Zener diodes are used in a zener barrier, which redirect the current or derive to the earth as soon as a certain voltage limit is exceeded. Zener diodes are protected against overload via fuse.

Our zener barriers protect devices in the ATEX zones 0, 1 and 2 (for gases) as well as 20, 21 and 22 (for dust) according to the European ATEX directive:

In zone 0 there is permanent, often or over long periods of an explosive atmosphere of gases, dampen or fog. Typical use cases are the interior of containers, pipes or reactors in which there are constantly combustible fabrics.

In ATEX zones 1 and 2, a zener barrier is an important part of the Explosion protection. These zones are specific areas that are classified according to the ATEX directive of the European Union and in which there is a high risk that flammable gases or vapors create an explosive atmosphere.

In Zone 1, the risk that flammable gases or vapors in normal operation create an explosive atmosphere. Devices and protection systems in this zone must be designed in such a way that they do not represent a source of ignition even in the event of an explosion. A zener barrier limits the electrical energy that reaches the devices in this area, and thus prevents an explosion from triggering an explosion by electrical sparks or overheating.

Zone 2 is an area in which the risk of an explosive atmosphere is lower and only occurs under separate conditions. Although the risk is lower here, precautions such as a Zener barrier are still needed to offer an additional security level if there are unexpectedly dangerous situations.

Zone 20 describes areas in which there is permanent, frequently or over a longer period of flammable dust in the air in dangerous quantities. Typical examples are the interior of silos, mills or conveyor snails.

In Zone 21, an explosive dust atmosphere in normal operation only occurs occasionally, for example at emptying silos or in the vicinity of filling systems.

Zone 22 can often be found in the vicinity of conveyor belts or in dust deposits outside of machines. Here the occurrence of an explosive dust atmosphere in normal operation is unlikely or only occurs for a short time

In all zones, a zener barrier contributes to safety by a reliable and effective method for Energy limit offers that minimizes the risk of ignition.

What are the advantages of a Zener barrier from Seikom Electronic?

A Zener barrier is essential in many environments and brings essential advantages with:

• It prevents too high electrical energy from getting into explosive areas, which reduces the risk of ignition.

• A zener barrier can easily be integrated into existing electrical systems because it is compact and does not require complex installations.

• The zener barrier is low -maintenance and offers a reliable protective method without regular exchange or maintenance.

• Compared to other security systems, a Zener barrier is an inexpensive solution for explosion protection.

• It can be configured for a wide variety of signal types and strengths and can therefore be used in a variety of industrial contexts.

• It increases the general security of the systems and contributes to minimizing the risk of accidents and the resulting downtimes.

Where is a Zener barrier used?

A Zener barrier is typically used in environments in which the Risk of explosions As in chemical processing, oil and gas industry, mining and other areas, which are classified as explosive zones, consists of electrical sparks or overvoltages.

The most common is a zener barrier in the Process control and automation technology used to ensure that measuring and control devices such as sensors, transmitter and other electronic controls can be operated safely. To do this, it is partly installed directly in the devices. It can also be found in control elements, signal converters and communication devices.

What devices is a zener barrier included in the scope of delivery?

With Seikom Electronic you will receive selected and special devices for measuring currents in explosive areas. The security barriers will basically install and protect devices in the ATEX zones 0, 1 and 2 and 20, 21, 22.

All single -channel flow measuring devices such as NLSW®45-3 EX and NLSW75A ex , NLSW®45-3 EX SIL1, NLSW®45-3 EX Sil1 analogous with two associated zener barriers. With all two -channel flow measuring devices such as NLSW®45-3 EX SIL2 As well as NLSW®45-3 EX Sil2 Analog, 4 Zener barriers are included in the scope of delivery due to the redundant sensor structure.

How to get your all-round package for us for us Demanding areas and find in our Product categories Quickly the right one for your claim. If you have any further questions about a Zener barrier or would like to get individually advised in advance, please contact us. Personally, by phone or by email. On request, we will make you a tailor -made offer. If you need safety barriers with special characteristic values, please contact us - an expansion of the existing certificates is easy. Our insights on this or other topics offer our counselor.