Surge protection for a floating signal circuit in the screw-on module with IP67 degree of

protection for sensor heads, connection: M20 x 1.5. Tested in accordance with the following

types of protection in Ex areas: Ex d/Ex tD/Ex ia IIC/Ex iaD. Suitable for use in the fieldbus

system in accordance with the FISCO concept. Can be used in safety-related circuits up to

SIL 3.