Phoenix Contact 2800041 A screw-on module offers surge protection for two floating signal circuits, featuring IP67 degree of protection and a ½ inch 14 NPT connection for sensor heads. It meets testing requirements for Ex areas, including Ex d/Ex tD/Ex iaIIC/Ex iaD classifications. The module is suitable for use in fieldbus systems following the FISCO concept and can be employed in safety-related circuits up to SIL 3.