IS Wireless Application

Intrinsically Safe (IS) Wireless Application

Intrinsic safety for electrical devises protects the environment from combustion, whether it is a gaseous environment—such as well heads or paint booths—or a combination of gas and dust (such as a coal-mining environment). Numerous methods are available to accomplish this task, including the use of explosion-proof housings, creating a “0” volume around the electronics using materials such as potting compounds, and/or electronic design principals. Our intrinsically safe wireless product designs most commonly use design principles to achieve intrinsic safety while maintaining a product that’s lightweight and serviceable. These design principles take the complete design into account, and evaluate and test the potential faults that may occur, ensuring that any fault cannot produce a spark or heat sufficient to ignite the combustible environment.

In an intrinsically safe application, a wireless control system’s basic architecture includes a wireless transmitter—typically handheld or belt mounted—and a receiver connected to the controlled equipment. The transmitter must be evaluated for intrinsic safety; the receiver can either be housed in an explosion-proof (XP) enclosure or an intrinsically safe device itself. If the receiver is housed in an XP enclosure, a number of considerations must be made when designing the system, such as isolation barriers for antenna cables and data communications, as well as command signaling in and out of the XP enclosure.

Cervis maintains a high level of expertise in intrinsically safe product design and application. We have experience working with equipment manufacturers and end users in the mining, grain handling, paint application and oil/gas energy extraction industries

  • “Intrinsically safe” equipment is designed in such a way that it does not cause combustion in hazardous environments due to electrical or thermal energy
  • “Explosion proof” equipment is designed to contain an explosion, not prevent it
  • IS equipment in the hazardous environments must carry intrinsic safety evaluation
  • Approved barriers must be in place for signals entering or exiting the XP wall
  • Control devices in hazardous environments—such as valve coils, relays, and sensors—must be intrinsically safe