RFS Operating Instructions 4. Regulation Use Model RFS devices are used for when monitoring liquid levels. The device should only be used with liquids that are compatible with the unit’s materials of construction. Level control is often accomplished with at least two level switches - one acting to sense the minimum level and the other for maximum level detection.
5. Operating Principle The Level Switch RFS is designed for economical control of liquids in vessels. The following three versions are available: A device with plug connection and two devices with aluminium housing connection of which one is an ATEX-version for the use in environment with gas explosion hazards.
In any case the marked hexagon surface must always be mounted vertically. Mounting position Depending on the mounting position of the device, the contact function (N/O or N/C contact) of the level switch will be defined. Mounted Mounted as as N/C N/O contact RFS K02/0118 page 5...
The level switch has a protective insulation; a separate protection wiring for the standard version is not necessary. For the RFS version for ATEX applications, the connection of the potential terminal is mandatory. An additional intrinsically safe relay is required in environment with gas explosion hazards (KFA…and respectively KFD).
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There are three connection terminals of which one terminal is clearly marked as a ground terminal. The two other terminals are connected in the same way as the standard devices RFS-1200N4 and RFS-1201N4 respectively. After the connection of any other from your designated external instruments to the limit contact, the device is ready for operation.
9. Technical Information Medium temperature: - 40...+120 °C Ambient temperature: -20...+80 °C (RFS-1200 N4 and RFS-1201 N4) -20...+ 60 °C (RFS-12Ex N4) Operating pressure: max. 5 bar mounting position: horizontal Materials • Housing / plug: plastic with RFS-1200 N4 aluminium with RFS-1201 N4 and RFS-12Ex N4 •...
10. Order Codes Example: RFS-1200 N4 Model Description Standard version with RFS-1200 N4 plug connection Standard version with housing connection RFS-1201 N4 (aluminium) ATEX version for use in environments with explosion RFS-12Ex N4* hazards *an additional relay is required for the use...
Certificazione per esame di tipo CE Marcatura LOM06ATEX2054X II 1 GD Ex ia IIC T6 Ga -20≤Ta≤+60ºC Fabricado en KOBOLD MESURA SLU Avda. Conflent 68 nave 15 08915 BADALONA (Spain Made in: Hergestellt in: Fabriqué dans: Fabbricato in: Organismo notificado LOM 0163 Número notificación...
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