Float Switches with Permanent Magnet For Vertical Installation Model RSM

Transcription

1 Level Measurement Float Switches with Permanent Magnet For Vertical Installation Model RSM WIKA Data Sheet LM Applications Level measurement for almost all liquid media Pump/level control and monitoring for defined filling levels Chemical industry, petrochemical industry, natural gas, offshore, shipbuilding, machine building, power generating equipment, power stations Process water and drinking water treatment, food and beverage industry Special Features Large scope of application due to the simple, proven functional principle For harsh operating conditions, long service life Operating limits: - Operating temperature: T = C - Working pressure: P = vacuum to 100 bar - Limit S. G.: ρ 400 kg/m 3 Wide variety of different electrical connections, process connections and materials Explosion-protected versions Description A float with a permanent magnet moves reliably along with the liquid level on a guide tube. Within the guide tube is fitted a reed contact (inert gas contact), which is energised, through the non-magnetic walls of the float and guide tube, by the approach of the float magnet. By using a magnet and reed contact the switching operation is non-contact, free from wear and needs no power supply. The contacts are potential-free. WIKA float switches with permanent magnets are also available with several switch points. Float Switches with Permanent Magnet, for vertical installation, Model RSM Fig. left: Stainless steel version, mounting thread Fig. right: Plastic version, flange connection The switch functions always refer to a rising liquid level: normally open / normally closed / change-over contacts. Through the use of a float for a max. of switch points a bistable switch operation can be achieved, meaning that the switching status also remains available, when the filling level continues to rise above or drop below the switch point. The float switch is simple to mount and maintenance-free, so the costs of mounting, coissioning and operation are low. WIKA Data Sheet LM /010 Page 1 of 14 Data Sheets showing similar devices: Float Switches with Permanent Magnet, horizontal installation; Model HIF; see data sheet LM 30.0 Float Switches with Permanent Magnet, lateral mounting; Model RSB; see data sheet LM 30.03

2 Further special features Process connection, guide tube material and float made of stainless steel or plastic Universal signal processing: connection direct to a PLC is possible, NAMUR connection, signal amplification / contact protection relays Works independently of foaming, conductivity, dielectricity, pressure, vacuum, temperature, steam, condensation, blistering, boiling effects and vibrations Multiple functionality in a single instrument - up to 8 potential-free contacts Exact repeatability of the switch points Float switches with permanent magnets qualify as passive electrical equipment in accordance with DIN IEC and can be installed in 'Zone 1' hazardous areas without certification, so long as the equipment is operated in a certified intrinsically safe circuit with a minimum explosion protection of EEx ib Options Customer-specific solutions Specific designs for interface layer detection -ρ 50 kg / m 3 Process connection, guide tube material and float made of stainless steel , , titanium, Hastelloy (others on request) Page of 14 WIKA Data Sheet LM /010

3 Application examples Level switch (EEx i) Intrinsically safe Intrinsically safe Intrinsically safe relay e.g.: KR 4 Ex Intrinsically safe relay e.g.: KR 4 Ex Ex zone non Ex zone Ex zone non Ex zone Level control (min.-max. control) Contact protection relay e.g.: KR 30 Contact protection relay e.g.: KR 4 Product prograe Selection of process connection, material and design further information on the indicated pages. Process connection Material Explosion-protected Material Stainless steel version PVC / PP / PVDF (without terminal box) G 1/8"... G " Page 4 Page 5 (adjustable guide tube) Page 7 (Mini float) - Page 8 G 1/"... G " Page 4 Page 5 (adjustable guide tube) Page 7 (Mini float) Page 6 Page 8 Flange DN DN 00 PN 6... PN 100 Page 4 Page 5 (adjustable guide tube) Page 9 (E-CTFE coated) Page 6 Page 8 Float versions: page 10 and 11 Contact protection measures: page 1 Connection diagrams: page 13 and 14 WIKA Data Sheet LM /010 Page 3 of 14

4 Standard version Process connection, guide tube material and float made of stainless steel Connection cable (without terminal box) Flange Electrical connection Process connection Connection cable PVC grey PVC blue Silicone PUR upwards G 3/8" (others on request) G 1/" (others on request) downwards G 1 1/" or G " Aluminium 64 x 58 x 34, with 1 contact Aluminium 80 x 75 x 57, or more contacts Option: Polypropylene, polyester, stainless steel Mounting flange DIN DN DN 00, PN 6... PN 100 ANSI "... 8", Class Guide tube diameter 1 or or or Guide tube length L max Float Temperature range standard Material stainless steel (Option: Buna, titanium) Float diameter from Float selection depending on guide tube diameter and process conditions (see page 10 and 11) PVC / PUR cable C Silicone cable C C Option: High temperature version: C Option: Low temperature version: C Switch function Max. number of contacts Switch position Distance between switch points Optionally contact makes S, contact breaks O or change-over U - at increasing level PVC cable 6 x S or O, or 4 x U Silicone cable 5 x S or O, or 3 x U 6 x S or O, or 4 x U Dimensions L 1, L, L 3... (from sealing face, starting from top) Minimum 0 (depending on the selection of the float and the contacts, see page 10 and 11) Contact rating Contact makes 30 V AC; 100 VA; 1 A 30 V DC; 50 W; 0.5 A Contact breaks 30 V AC; 100 VA; 1 A 30 V DC; 50 W; 0.5 A Please observe contact protection measures (see page 1)! Change-over 30 V AC; 40 VA; 1 A 30 V DC; 0 W; 0.5 A Mounting position Vertical ± 30 Attention: Versions without protective earth conductor - operation only at safety extra-low voltage e.g. WIKA contact protection relay or external earthing Ingress protection IP 65 per EN / lec 59 Page 4 of 14 WIKA Data Sheet LM /010

5 Version with adjustable guide tube Process connection, guide tube material and float made of stainless steel guide tube adjustable by loosening union nut Connection cable 7 flats guide tube adjustable by loosening union nut 7 flats guide tube adjustable by loosening union nut 7 flats 14 G 1/" (without terminal box) Flange Electrical connection Process connection Guide tube diameter Guide tube length L max. Float Nominal pressure Temperature range standard Switch function Max. number of contacts Switch position Distance between switch points Connection cable PVC grey PVC blue Silicone PUR upwards G 1/" (others on request) Aluminium 64 x 58 x 34, with 1 contact Aluminium 80 x 75 x 57, or more contacts Option: Polypropylene, polyester, stainless steel downwards G 1 1/" or G " (others on request) Material stainless steel (Option: Buna, titanium) Float diameter from Float selection depending on guide tube diameter and process conditions (see page 10 and 11) 5 bar PVC / PUR cable C Silicone cable C C Optionally contact makes S, contact breaks O or change-over U - at increasing level PVC cable 6 x S or O, or 4 x U Silicone cable 5 x S or O, or 3 x U 6 x S or O, resp. 4 x U Dimensions L 1, L, L 3... (from sealing face, starting from top) Minimum 0 (depending on the selection of the float and the contacts, see page 10 and 11) Mounting flange DIN DN DN 00, PN 6... PN 100 ANSI "... 8", Class Contact rating Contact makes 30 V AC; 100 VA; 1 A 30 V DC; 50 W; 0.5 A Contact breaks 30 V AC; 100 VA; 1 A 30 V DC; 50 W; 0.5 A Please observe contact protection measures (see page 1)! Change-over 30 V AC; 40 VA; 1 A 30 V DC; 0 W; 0.5 A Mounting position Vertical ± 30 Attention: Versions without protective earth conductor - operation only at safety extra-low voltage e.g. WIKA contact protection relay or external earthing Ingress protection IP 54 per EN / lec 59 IP 65 per EN / lec 59 WIKA Data Sheet LM /010 Page 5 of 14

6 Explosion-protected version, intrinsically safe II 1/G EEx ia IIC T3-T6 KEMA 09 ATEX 018X II D T80 C IP6X Process connection, guide tube material and float made of stainless steel X X Process temperature Raised terminal box X < 60 C 0 < 135 C 60 < 180 C 80 Flange Electrical connection Aluminium 80 x 75 x 57 Option: Polyester, stainless steel Process connection downwards G 1 1/" or G " (others on request) Mounting flange DIN DN DN 150, PN 6... PN 64 ANSI "... 6", Class Guide tube diameter 1 or or Guide tube length L max Float Temperature class Process temperature Ambient temperature at terminal box Material stainless steel (Option: Buna, titanium) Float diameter from Float selection depending on guide tube diameter and process conditions (see page 10 and 11) T3 T4 T5 T6 Max. 180 C 130 C 95 C 80 C Max. 60 C 60 C 60 C 60 C Switch function Max. number of contacts Switch position Distance between switch points Contact rating Optionally contact makes S, contact breaks O or change-over U - at increasing level 6 x S or O, or 4 x U Dimensions L 1, L, L 3... (from sealing face, starting from top) Minimum 0 (depending on the selection of the float and the contacts, see page 10 and 11) Only for connection to a certified intrinsically safe circuit with U max 36 V, I max 100 ma Mounting position Vertical ± 30 Ingress protection IP 65 per EN / lec 59 Options Temperature resistance Pt100 or Pt1000 Bimetal thermal contact C (in 5 degree steps) Page 6 of 14 WIKA Data Sheet LM /010

7 Mini float version Process connection and guide tube material made of stainless steel Coupler connector ASC4 M1 x 1 Connection cable 1 G 1/8" 7 flats (without terminal box) Electrical connection Connection cable PVC grey PVC blue Silicone PUR Aluminium 64 x 58 x 34 Coupler connector ASC4, C F-4P Coupler connector M1 x 1 Process connection upwards G 1/8" (others on request) downwards oder G 1" (others on request) Guide tube diameter 8 Guide tube length L max. 500 Float Temperature range Switch function Max. number of contacts Material stainless steel (Option: Buna, polypropylene, titanium) Float diameter from Float selection depending on guide tube diameter and process conditions (see page 10 and 11) C (Float material stainless steel or titanium) C (Float material Buna or polypropylene) Optionally contact makes S, contact breaks O or change over U - at increasing level 3 x S or O, or 1 x U Contact rating Contact makes 50 V AC; 10 VA; 0.5 A 50 V DC; 5 W; 0.5 A Contact breaks 50 V AC; 10 VA; 0.5 A 50 V DC; 5 W; 0.5 A Please observe contact protection measures (see page 1)! Change-over 8 V AC; 6 VA; 0.6 A 8 V DC; 3 W; 0.3 A Mounting position Vertical ± 30 Attention: Versions without protective earth conductor - operation only at safety extra-low voltage e.g. WIKA contact protection relay or external earthing Ingress protection IP 54 per EN / lec 59 IP 65 per EN / lec 59 WIKA Data Sheet LM /010 Page 7 of 14

8 Plastic version Process connection, guide tube material and float made of PVC, polypropylene or PVDF Guide tube Ø 1 Connection cable 1 G 3/8" flats M0 x 1.5 M0 x 1.5 Guide tube Ø 16 Connection cable 14 G 1/" 7 flats Guide tube Ø 0 Connection cable 4 G 1" 3 flats (without terminal box) Flange Electrical connection Process connection Guide tube diameter Guide tube length L max. Connection cable PVC grey PVC blue PUR, upwards G 3/8" (Guide tube Ø 1 ) G 1/" (Guide tube Ø 16 ) G 1" (Guide tube Ø 0 ) (others on request) Polypropylene 80 x 8 x 55, downwards G 1 1/" or G " (others on request) 1, 16 or 0 (16 and 0 : strengthened with a metallic inner tube) 500 (Guide tube Ø 1 ) 3000 (Guide tube Ø 16 ) 5000 (Guide tube Ø 0 ) Mounting flange DIN DN DN 15, PN 10, Form A ANSI "... 5", Class 150 FF Float Material PVC Polypropylene PVDF Float diameter from Float selection depending on guide tube diameter and process conditions (see page 11) Temperature range PVC C Polypropylene C PVDF C Switch function Optionally contact makes S, contact breaks O or change-over U - at increasing level Max. number of 4 x S or O (PP max. 3) resp. 3 x U (PP max. ) contacts Switch position Dimensions L 1, L, L 3... (from sealing face, starting from top) Distance between Minimum 0 (depending on the selection of the float and the contacts, see page 11) switch points Contact rating Contact makes 30 V AC; 100 VA; 1 A 30 V DC; 50 W; 0.5 A Contact breaks 30 V AC; 100 VA; 1 A 30 V DC; 50 W; 0.5 A Please observe contact protection measures (see page 1)! Change-over 30 V AC; 40 VA; 1 A 30 V DC; 0 W; 0.5 A Attention: Versions without protective earth conductor - operation only at safety extra-low voltage e.g. WIKA contact protection relay or external earthing Mounting position Vertical ± 30 Ingress protection IP 54 per EN / lec 59 IP 65 per EN / lec 59 Page 8 of 14 WIKA Data Sheet LM /010

9 Stainless steel version, E-CTFE coated Process connection, guide tube material and float made of stainless steel , E-CTFE coated Flange (Guide tube diameter 1 ) Flange (Guide tube diameter 18 ) Electrical connection Aluminium 64 x 58 x 34, with 1 contact Aluminium 80 x 75 x 57, or more contacts Option: Polypropylene, polyester, stainless steel Process connections Mounting flange DIN DN DN 00, PN 6... PN 40 ANSI "... 8", Class Guide tube diameter 1 18 Guide tube length L max Float Temperature range Switch function Max. number of contacts Switch position Distance between switch points Material stainless steel (E-CTFE coated) Float diameter from Float selection depending on guide tube diameter and process conditions (see page 10) Depending on medium Optionally contact makes S, contact breaks O or change-over U - at increasing level 3 x S or O, resp. x U Dimensions L 1, L, L 3... (from sealing face, starting from top) Minimum 0 (depending on the selection of the float and the contacts, see page 10) Contact rating Contact makes 30 V AC; 100 VA; 1 A 30 V DC; 50 W; 0.5 A Contact breaks 30 V AC; 100 VA; 1 A 30 V DC; 50 W; 0.5 A Please observe contact protection measures (see page 1)! Change-over 30 V AC; 40 VA; 1 A 30 V DC; 0 W; 0.5 A Mounting position Vertical ± 30 Attention: Versions without protective earth conductor - operation only at safety extra-low voltage e.g. WIKA contact protection relay or external earthing Ingress protection IP 65 per EN / lec 59 WIKA Data Sheet LM /010 Page 9 of 14

10 Spherical floats (K) Ø C D E B D = Limit S. G. of the medium iersed float volume 85 % E = Nominal S. G. of the medium iersed float volume 50 % Ø A Material Suits guide tube Ø Ø A B Ø C Max. working pressure bar Max. operating temperature C Limit S. G. 85 % kg/m 3 Nominal S. G. 50 % kg/m 3 Stainless steel Titanium Stainless steel depending on medium E-CTFE coated depending on medium depending on medium depending on medium depending on medium depending on medium depending on medium Note: The optimum float will be selected after a feasibility test carried out by WIKA. Page 10 of 14 WIKA Data Sheet LM /010

11 Cylindrical floats (Z) Ø C D E B D = Limit S. G. of the medium iersed float volume 85 % E = Nominal S. G. of the medium iersed float volume 50 % Ø A Material Suits guide tube Ø Ø A B Ø C Max. working pressure bar Max. operating temperature C Limit S. G. 85 % kg/m 3 Nominal S. G. 50 % kg/m 3 Stainless steel Titanium Buna PVC Polypropylene PVDF Stainless steel E-CTFE coated depending on medium Note: The optimum float will be selected after a feasibility test carried out by WIKA. WIKA Data Sheet LM /010 Page 11 of 14

12 Contact protection measures To ensure reliable operation of sensors with reed switches and highest possible service life, we recoend using one of the following circuits. Inductive load AC S1 Surge current measurement with oscilloscope S1 C R E 4-30V AC R C RC modules depending on operating voltage see table Example: C = 0.33 µf/4 V DC 4 V DC R M Inductive load DC V DC S1 Shunt diode e.g. 1N4007 I (A) without current limitation with current limitation not allowed allowed Current limitation with capacitive load e.g. PLC, DCS and cables > 50 m Protective RC modules t (? µ s) + 4 V DC S1 R S C 1 SPS Rs = Ohm (47 Ohm with 0 VA contacts) C 1 = internal capacitance RC modules are, depending on the operating voltage, to be used exclusively according to the table below. D L D = Ø 16 - Ø 5 L = 6-58 Current limitation with electronic timers 00 wire + 30 V AC S1 R S C 1 time Zeitrelais relay Rs = 0 Ohm (30 V AC) C 1 = internal capacitance For inert gas contacts from VA Capacitance Resistance Voltage 0.33 µf 100 Ohm 4 V AC 0.33 µf 0 Ohm 48 V AC 0.33 µf 470 Ohm 115 V AC 0.33 µf 1500 Ohm 30 V AC For inert gas contacts from VA Capacitance Resistance Voltage 0.33 µf 47 Ohm 4 V AC 0.33 µf 100 Ohm 48 V AC 0.33 µf 470 Ohm 115 V AC 0.33 µf 1000 Ohm 30 V AC Other types than the RC modules specified here might lead to destruction of the reed contact. Page 1 of 14 WIKA Data Sheet LM /010

13 Connection diagrams Colour coding per IEC 757 PVC cable Silicone cable Contact makes or breaks Change-over Contact makes or breaks Change-over Contact makes or breaks Change-over switch points 3 switch points 4 switch points L4 5 switch points VT L4 L5 switch points 3 switch points / 4 switch points / VT / L4 switch points 3 switch points switch points 1 switch points switch points switch points L4 8 5 switch points L4 8 VT 9 L5 CLEAR switch points switch points 1 OG switch points 1 OG VT 11 L4 CLEAR 1 6 switch points 6 switch points / / VT L4 L5 L VT 9 CLEAR OG 1 L4 L5 L6 WIKA Data Sheet LM /010 Page 13 of 14

14 Connection diagrams Colour coding per IEC 757 Coupler connector ASC4 Coupler connector M1 Contact makes or breaks Change-over switch points PE 1 4 Float switches with thermal contacts PVC or silicone cable or terminal box PVC cable Silicone cable or terminal box PVC or silicone cable or terminal box PVC cable 1 Thermal contact Thermal contacts Thermal contacts 1 Thermal contact Thermal contacts Thermal contacts ϑ ϑ 55 C ϑ 75 C ϑ 55 C ϑ 75 C ϑ / ϑ 55 C ϑ 75 C 1 OG ϑ 55 C ϑ 75 C Coupler connector ASC4 Coupler connector M1 Coupler connector M1 1 Thermal contact 1 3 ϑ 1 Thermal contact ϑ 1 Thermal contact ϑ Ordering information Model / Version / Electrical connection / Process connection / Guide tube diameter / Guide tube length L / Information about contact (switch function, number of switch points, switch position) / Process details (operating temperature and pressure, Limit S. G.) / Options Modifications may take place and materials specified may be replaced by others without prior notice. Specifications and dimensions given in this leaflet represent the state of engineering at the time of printing. Page 14 of 14 WIKA Data Sheet LM /010 WIKA Alexander Wiegand SE & Co. KG Alexander-Wiegand-Straße Klingenberg/Germany Tel. (+49) 937/13-0 Fax (+49) 937/ info@wika.de 01/010 GB