Intrinsically safe interface solutions

The guide is based on the ATEX certification but in general, the guidelines apply to other intrinsic safety standards including NEC and IECEx.

Focusing on interface selection, the guide offers advice regarding the advantages and disadvantages of Zener barriers and isolation interfaces and provides the general entity parameters for E2S intrinsically safe products. Typical system diagrams detail how efficiently to employ different types of Zener barriers or isolators to control combination audio-visual signals and multiple alarm stages.