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The Zener Barrier is a 2-channel intrinsic safety device designed for applications requiring DC voltage control with negative polarity. With a working voltage range of 24 V/18 V at 10 µA, it ensures reliable operation in hazardous environments.
The Zener Barrier is an essential component within the Pepperl+Fuchs family of intrinsic safety barriers, specifically engineered to enhance safety in explosive atmospheres by limiting the energy available in circuits. This device operates by utilizing Zener diodes, which provide overvoltage protection and ensure that the energy transmitted to the field devices remains within safe limits, thus preventing ignition sources in potentially hazardous areas.
Common applications for Zener Barriers include use in industrial settings where equipment must operate safely in the presence of flammable gases or dust. By allowing safe integration of standard electrical devices such as sensors and actuators into intrinsically safe circuits, these barriers play a critical role in ensuring compliance with safety regulations and standards. The device’s DIN rail mounting feature facilitates straightforward installation and integration into existing control systems, making it a versatile solution for various industries.
| Mounting | on 35 mm DIN mounting rail acc. to EN 60715:2001 |
| Series resistance | terminals 1, 8: max. 340 Ω terminals 4, 5: max. 437 Ω |
| Type | DC version, negative polarity |
| Degree of protection | IP20 |
| Fuse rating | 50 mA |
| Nominal resistance | terminals 1, 8: 320 Ω terminals 4, 5: 415 Ω |
| Relative humidity | max. 75 % , without condensation |
| Construction type | modular terminal housing , see system description |
| Mass | approx. 150 g |
| Connection | screw terminals |
| Supplementary information | Observe the certificates, declarations of conformity, instruction manuals, and manuals where applicable. For information see www.pepperl-fuchs.com. |
| Dimensions | 12.5 x 115 x 110 mm (0.5 x 4.5 x 4.3 inch) |
| Core cross-section | max. 2 x 2.5 … mm2 |
| EU-type examination certificate | BAS 01 ATEX 7005 |
| Storage temperature | -25 … 70 °C (-13 … 158 °F) |
| Connection | terminals 1, 2; 3, 4 |
| Series resistance | terminals 1, 2: min. 314 Ω; terminals 3, 4: min. 407 Ω |
| IECEx approval | IECEx BAS 09.0142 IECEx BAS 17.0091X |
| Degree of protection | IEC 60529 |
| Certificate | TV 99 ATEX 1484 X |
| Ambient temperature | -20 … 60 °C (-4 … 140 °F) |
| Connection | terminals 5, 6; 7, 8 |
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