Partner Comet has a wide range of ATEX (Ex) certified explosion-proof devices in its product range: Ex sensors, Zener barrier.
New from Comet:
The ZbC2+ Zener barrier is a certified explosion-proof interface (protection system) for explosion protection of electrical equipment in potentially explosive atmospheres (Ex zones). It is used to connect a certified explosion-proof device (e.g. Ex transducer/transducer/sensor) located in potentially hazardous areas (Ex zones) to a non-certified device located in a safe area.
The Zener barrier prevents the transfer of unacceptably high energy from the safe zone to the unsafe zone. The zener barrier must be installed outside the Ex zone. The output of the Zener barrier can be connected to measuring devices and controllers without ATEX certification.
The Zener barrier limits the amount of energy that can enter the blast zone to a low enough level that any spark does not have enough energy to ignite the explosive gas mixture. It contains two identical reversible diode interlocks in a common housing and is designed for DIN rail mounting in a safe area.
The certified explosion-proof device (also known as a hazardous area intrinsically safe device) and the Zener barrier in the hazardous area must be compliant. The intrinsic safety parameters Uo and Io of the Zener barrier must be lower than the Ui and Ii values of the device (Ui and Ii are the maximum voltage and current values that can be applied to the terminals of the device according to the certificate).
The transducers are designed to measure ambient temperature and relative humidity (in air free of toxic gases). They are explosion-proof (Ex) and suitable for potentially explosive environments in Zone II.
Meters that convert temperature and relative humidity values and are ATEX certified:
The ELPRO Adhesive product range includes more than 300 explosion-proof products, the so-called Ex products. Related to these, our team includes two professionally trained and certified Ex experts (Explosion Protection Regulations and ATEX Directive) to advise on the selection, installation, use and maintenance of equipment used in potentially explosive atmospheres.
By Zoran Lepenik and Rok Samec, September 2022
Source: comet system NEWSLETTER – August 2022
Tel: +386 2 62 96 720.
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