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Ex Protection Options For Deploying Wireless Into Hazardous Areas

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By Author: PMV
Total Articles: 3
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Deploying wireless devices in hazardous areas requires adherence to strict safety standards to prevent explosions and ensure safe operation. Two main options exist for integrating wireless technology in these environments: using Ex-certified wireless devices or employing Ex-certified enclosures to house standard devices.

1. Ex-Certified Devices and Enclosures: -

When a wireless device lacks hazardous area certification, the most feasible approach is to use an Ex-certified enclosure. These enclosures are designed to contain internal explosions and prevent external ignition sources from contacting combustible gases or dust.

2. Types of Ex Protection: -

Ex d (Flameproof/Explosion-Proof): This method involves containing an explosion within the enclosure, ensuring that any escaping gases or flames cool down sufficiently to prevent ignition. Ex d enclosures are robust, typically made from heavy materials, and suitable for Zones 1, 2, 21, 22, and Division 1 areas.

Ex nR (Restricted Breathing): Designed for Zone 2 and Division 2 areas, these enclosures ...
... prevent the ingress of explosive gases, thus eliminating the risk of internal ignition. They are generally lighter and less cumbersome than Ex d enclosures.

3. Intrinsically Safe Options: -

For scenarios where only the antenna needs to be in the hazardous area, using an intrinsically safe RF isolator can restrict hazardous fault currents. This allows the use of standard antennas while maintaining safety. Alternatively, Ex-rated antennas designed to meet safety standards can be used directly in hazardous zones.

Conclusion: -

Choosing the appropriate protection method depends on the specific hazardous environment and operational requirements. By understanding the various Ex protection options, businesses can confidently deploy wireless technologies in hazardous areas, enhancing safety and operational efficiency.

For more detailed information, visit Perth Hazardous Area Courses and explore their comprehensive resources on hazardous area safety.

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