Float switch Dimensions O29.2 135 Sleeve design LFL2-CK-U 6 ll Ba LFL2-**-U O8 Ball design LFL2-BK-U Function The microswitch (change-over contact) is integrated in a PP float and is activated in the event of deviations from the horizontal position. The switching ball in the float, which moves along an axis, activates the microswitch. Features * Switching element: microswitch, mercury-free * Limit value detection for fluids * Sleeve design: small diameter, mounting through G1 tap hole possible Electrical connection Release date 2007-07-12 13:51 Date of issue 2007-07-12 T3018_ENG.xml * Ball design: high buoyancy Cable colours black-brown black-blue Subject to reasonable modifications due to technical advances. = = when potential-free contact open contact closed Copyright Pepperl+Fuchs, Printed in Germany Pepperl+Fuchs Group * Tel.: Germany +49-621-776-0 * USA +1-330-4253555 * Singapore +65-67-799091 * Internet www.pepperl-fuchs.com 1 Technical data Float switch LFL2-**-U Application Description microswitch with switching ball, change-over contact Function and system design Equipment architecture This device may be used with any sequential circuit, as long as the circuit can support the electrical circuit values of the switching elements. Auxiliary energy Supply voltage max. 250 V AC, 150 V DC Current consumption max. 3 (1) A Operating conditions Mounting conditions Installation instructions range of application and minimum length between mounting and float: - PVC version: 50 mm (2 in), preferred for water, waste water, slightly aggressive liquids - PUR version: 100 mm (4 in), preferred for fuels, heating oils, oily fluids - CSM/CM version: 100 mm (4 in), preferred for many acids and lyes mounting: - The float switch is mounted either from sidewards through a cable gland G1A into the vessel or - by means of a counter weight or rods (e. g. float switch assembly) from the top. - The pivot of the cable should always be horizontal. Process conditions Process temperature PVC version: 5 ... 70 C (278 ... 343 K) PUR version: 5 ... 70 C (278 ... 343 K) CSM/CM version: -20 ... 90 C (253 ... 363 K) Process pressure (static pressure) sleeve design: 3 bar at 20 C (293 K) ball design: 2 bar at 20 C (293 K) Density sleeve design: 0.8 g/cm3 ball design: 0.6 g/cm3 Mechanical specifications Protection degree IP68 Mechanical construction Versions sleeve design: LFL2-CK-U-PVC3, LFL2-CK-U-PUR3, LFL2-CK-U-CSM3 ball design: LFL2-BK-U-PVC3, LFL2-BK-U-PUR3, LFL2-BK-U-CSM3 Material float: PP (Polypropylene) cable: - PVC version: PVC cable, highly flexible (3 x 0.75 mm2) - PUR version: PUR cable, highly flexible (3 x 0.50 mm2) - CSM/CM version: CSM/CM cable (chlorinated polyethylene, (3 x 0.75 mm2)) Switching point switch angle: upper switching point +25 ( 10), lower switching point -14 ( 6), measured against the horizontal General information Directive conformity Directive 73/23/EEC (Low Voltage Directive) EN 50178 Directive 89/336/EC (EMC) EN 60947-5-2, EN 60947-5-2 A1 Conformity Protection degree EN 60529 Statement of Conformity, Declaration of Conformity and instructions have to be observed. For information see www.pepperl-fuchs.com. Release date 2007-07-12 13:51 Date of issue 2007-07-12 T3018_ENG.xml Supplementary information Subject to reasonable modifications due to technical advances. Copyright Pepperl+Fuchs, Printed in Germany Pepperl+Fuchs Group * Tel.: Germany +49-621-776-0 * USA +1-330-4253555 * Singapore +65-67-799091 * Internet www.pepperl-fuchs.com 2 Technical data Float switch LFL2-**-U Accessories * LFL-Z231, counter nut, G1A, PVC * LFL-Z32, counter weight, grey cast iron with plastic coating (Polycarbonate) * LFL-Z33, counter weight, grey cast iron with ECTFE coating (Halar) * * * * * * LFL-Z131, cable gland G1A, PVC LFL-Z132, cable gland G1A, brass LFL-Z161, cable gland G2A, PVC LFL-Z431, cable gland 1 NPT, PVC LFL-Z432, cable gland 1 NPT, brass LFL-Z461, cable gland 2 NPT, PVC Type code/model number L F L 2 - K - U - Cable length 3 3 m (10 ft) 5 5 m (16.5 ft) 10 10 m (33 ft) Release date 2007-07-12 13:51 Date of issue 2007-07-12 T3018_ENG.xml Cable material PVC PVC cable PUR PUR cable CSM CSM cable Electrical output U change-over contact 250 V AC, 150 V DC Float material K plastic PP Float form C sleeve B ball Switching element 2 microswitch with switching ball Subject to reasonable modifications due to technical advances. Copyright Pepperl+Fuchs, Printed in Germany Pepperl+Fuchs Group * Tel.: Germany +49-621-776-0 * USA +1-330-4253555 * Singapore +65-67-799091 * Internet www.pepperl-fuchs.com 3