EN 61326, ATEX II (1) GD [Ex ia] IIC, Ex II 3 G Ex nAC IIC T4 X, [Ex ia] IIC; [Ex iaD]; Ex nAC IIC T4 X, SIL 2 according to EN 61508, CUL Listed, UL Listed, IECEx, UL-EX LIS / CUL-EX LIS. CE-compliant. Ex i NAMUR Isolating Amplifier for Proximity Sensors and Switches. The signals are transmitted via a relay output (PDT contact) to the safe area Line fault detection (LFD), 3-way isolation, SIL 2