Phoenix Contact 2865434 The Ex i NAMUR isolation amplifier is designed for use in hazardous areas where proximity sensors and switches need to be operated while minimizing the risk of explosion. The device routes signals from these sensors to a secure area via a relay output with changeover contacts, providing line fault detection capabilities as well as 3-way isolation. Additionally, it meets SIL 2 standards for safety integrity level, ensuring reliable operation in potentially explosive environments.