Level Pressure Flow Temperature Liquid Registration Systems Services Solutions Analysis Components Technical Information Level limit switch for liquids The Liquiphant T FTL20 is a level limit switch for all kinds of fluids and is used in tanks, containers and pipelines. It is used in cleaning and filtering systems and coolant and lubricant tanks as an overspill protection or The FTL20 is ideal for applications which previously used float switches and conductive, capacitive and optical It also works in applications which are unsuitable for these measuring methods due to conductivity, build-ups, turbulence, flows or air bubbles. The FTL20 is not suitable for hazardous areas and areas where the medium temperature is above 150 °C. For hygienic areas the use of FTL20H is recommended. Your benefits ■ Operational safety, reliability and universal applicability through use of the tuning fork measuring ■ External test option using test magnet ■ On-site control using external LED display ■ Easy to install even at points difficult to access due to compact construction ■ Rugged stainless steel housing (316L) ■ Service-friendly plug-in connections People for Process Automation

Liquiphant T FTL20 Table of contents Function and system design. . . . . . . . . . . . . . . . . . . . . 3 Measuring principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Measuring system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Input . . . . . ....

Liquiphant T FTL20 Function and system design Measuring principle The tuning fork of the FTL20 is brought to its resonance frequency by means of a piezoelectric drive. If the tuning fork is covered by liquid, this frequency changes. The electronics of the FTL20 monitor the resonance frequency and indicate whether the tuning fork is freely vibrating or is covered by liquid. Measuring system The measuring system comprises: • Liquiphant T FTL20 limit switch • Progammable logic control (PLC), miniature contactor, solenoid valve or AS-i bus 1 AS-interface 2 PLC ... U– 3 ~ 230 V L00-FTL20Hxx-14-05-xx-en-001...

Measured variable Density Other density settings on request, e.g. 0.5 g/cm3 Switching outputs Operating modes for variants The FTL20 can be connected in two operating modes. By choosing the suitable operating mode AC and DC-PNP (MAX or MIN safety), you ensure that the FTL20 switches safely even in the event of a fault (e.g. if the power supply line is disconnected). ■ The FTL20 keeps the electronic switch closed as long as the liquid level is below the fork. ■ Example of an application: overfill protection ■ The FTL20 keeps the electronic switch closed as long as the fork is immersed in liquid....

Power supply Cable entry a: Polyamid; b: NBR/SEBS; c: PPSU; d: 316L; e: PUR blue; f: PVC grey; g: Cu Sn/Ni 4 x 0.34 M12 elbowed (order number: 52010285) Electrical connection Variant DC-PNP (direct current) Ml 2x1 connector Voltage source: shock-protected voltage or Class 2 circuit (North America) Suitable for use in non-equivalent operation: When both outputs are connected, the MIN and MAX outputs take on opposite states in trouble-free operation. In the event of an alarm condition or a line break, both electronic switches are open. In addition to level monitoring, function-dependent sensor...

Liquiphant T FTL20 Variant DC-PNP (direct current) valve connector Operating mode MAX (NC contact) Operating mode MIN (NO contact) 3 2 2 3 3 2 2 3 L00-FTL20xxx-04-05-xx-xx-005 L00-FTL20xxx-04-05-xx-xx-004 1 1 2 2 + 3 3 + R – R – 0.5 A L– PE L+ L– PE (Ground) 0.5 A L+ (Ground) L00-FTL20xxx-04-05-xx-xx-011 L00-FTL20xxx-04-05-xx-xx-012 Variant AC (alternating current) valve connector Operating mode MAX Operating mode MIN 1 3 1 2 1 3 1 2 L00-FTL20xxx-04-05-xx-xx-007 L00-FTL20xxx-04-05-xx-xx-006 1 1 2 3 > 19 V > 19 V R R 0.5 A 0.5 A PE L1 N PE L00-FTL20xxx-04-05-xx-xx-013 ! 6 L1 N (Ground) (Ground)...

The address is defaulted to 0 (HEX). It is changeable via the bus master or programming unit. Parameter bits (P0...P3) are not used.

Performance characteristics Switching delay 0.5 s when covering 1.0 s when becoming free Other switching time on request Medium: water Installation from above /vertical Measured value resolution < 0.5 mm Measuring frequency Approx. 1100 Hz in air Maximum measured error 13.0 ±1 mm ambient temperature medium temperature medium pressure Operating conditions: Installation instructions Orientation The Liquiphant T FTL20 can be installed in any position in a container or pipe. The formation of foam does not impair its function. Example 1): Overfill protection or top level detection Example 2): Dry...

Connecting cable Operating conditions: Environment Ambient conditions * max. 150 mA relay switching capacity Storage temperature IP65 with valve connector IP66/67withM12xl connector PPSU (plastic)

Electromagnetic compatibility Interference emission to EN 61326, Electrical Equipment Class B, interference immunity to EN 61326, Annex A (Industrial) and NAMUR Recommendation NE 21 (EMC). Overvoltage protection Operating conditions: Process Medium temperature range k Max. process temperature of the 100 °C variant type (see also "Operating conditions: Environment"]. > 0.7 g/cm3 (other density setting on request) Stagnant mineral water

Liquiphant T FTL20 Design, dimensions of the 100 °C variant M12x1 Valve connector QUICKON 40 51.5 28.5 3.5 * 2 3.5 * ø17.1 13 *1 38.2 32 AF 13 *1 38.2 32 AF 13 *1 155 148.5 32 AF ø40 ø31.5 161 ø40 ø31.5 ø31.5 2 3.5 * 2 ø17.1 ø17.1 *2 *2 38.2 45.5 30 36 45 *2 L00-FTL20xxx-06-05-xx-en-002 *1 Switch point with vertical installation *2 Switch point with horizontal installation; the level increases in the direction of the arrow Switch points at: density 1 / 23 °C / 0 bar Process connections Process connection / Dimensions Order code G ½, G¾ DIN ISO 228/I Accessories (optional) 0 1 Pressure Temperature...