Fill level switch with two switching points

Transcription

1 Fill level switch Product series WSx For oil and hydraulic fluid reservoirs For use in SKF centralized lubrication systems Fill level switches monitor the fill level in non-pressurized fluid reservoirs. Different designs are available to suit different requirements. Fill level switch with one switching point (WS) for monitoring of the minimum fill level in a reservoir. Fill level switch with two switching points (WS5) for monitoring of the minimum fill level and for early warning of minimum fill level. With this design, a signal is given before a critical oil level is reached so that the oil can be topped up before the machine comes to a standstill. At the time when the signal is given, there is still enough oil in the reservoir for production to continue without stopping the machine or interrupting work. Fill level switch with two switching points (WS) to monitor the minimum and maximum fill levels in the reservoir. The WS stops automatic filling of the reservoir when the maximum fill level is reached. Other fill level switches are available on request, e.g. with three switching points, or for other media such as grease (with capacitive proximity switch).

2 Fill level switch Note for the use of fill level switches! Be mindful of oil viscosity SKF float switches may only be used in mineral and synthetic oils up to a maximum effective viscosity of 500 mm²/s. Use in media with an effective viscosity > 500 mm²/s can cause an increase in the shear forces between the float and contact tube, leading to failure of the float switch. This can result in insufficient lubrication and thereby to machine damage.! Protect contacts from erosion The switching capacities specified for the individual switches refer to the resistive load. If inductive loads are connected, we recommend the use of a suitable means of spark suppression (e.g. RC element, varistor, free-wheeling or suppressor diode) to limit voltage spikes upon switch-off. This will extend the service life and improve the reliability of the contacts.! Be mindful of contact rating The graphs show the voltage and current function in relation to the max. switching capacity and are valid for the fill level switches with reed contacts WS-, WS- und WS5-. The maximum permissible AC or DC voltage is 0 V, and the maximum permissible AC or DC current is A. AC voltage [V] 0 0 Switching capacity 00 max. 60 VA , 0, 0,6 0,8,0 Current [A] DC voltage [V] , Switching capacity max. 0 W 0, 0,6 0,8,0 Current [A] PUB LS/P 59 EN -70-EN

3 Fill level switch Product overview WS-S0 WS-S0 WS- WS--V57-A WS6- WS68 Productselection table Series Switching points Function / contact type Plug connector Voltage, current, switching capacity Fitting position Page PUB LS/P 59 EN -70-EN WS-S0 min. fill level / changeover Circular connector with LED DIN EN WS-S0 max. fill level / changeover min. fill level / changeover WS5-S0 early warning / changeover min. fill level / changeover Circular connector with LED DIN EN Circular connector with LED DIN EN WS-S0 min. fill level / changeover Circular connector M with LED WS-S0 max. fill level / NC contact min. fill level / NC contact WS5-S0 early warning / NO contact min. fill level / NC contact Circular connector M with LED Circular connector M with LED WS- min. fill level / changeover Square connector DIN EN A WS- max. fill level / NO contact min. fill level / NC contact WS5- early warning / NO contact min. fill level / NC contact Square connector DIN EN A Square connector DIN EN A V DC / A; W ) Vertical 5, 6 V DC / A; 0 W ) Vertical 5, 6 V DC / A; 0 W ) Vertical 5, 6 V DC / A; 0 W Vertical 5, 7 V DC / A; 0 W Vertical 5, 7 V DC / A; 0 W Vertical 5, 7 See graph on page Vertical 5, 8 See graph on page Vertical 5, 8 See graph on page Vertical 5, 8 WS--V57-A min. fill level / changeover Circular connector M V AC / A; VA ) 8 V DC / A 0 W ) Vertical 5, 9 WS--V57-A max. fill level / NO contact min. fill level / NC contact WS5--V57-A early warning / NO contact min. fill level / NC contact WS6- min. fill level / NO or NC contact (depending on mounting pos.) Circular connector M V AC / A; VA ) Vertical 5, 9 8 V DC / A 0 W ) Circular connector M V AC / A; VA ) Vertical 5, 9 8 V DC / A 0 W ) Plug connector DIN EN A WS68 min. fill level / NC contact Plug connector DIN EN A ) Safety measures to be applied for correct operation: Protective extra-low voltage (LV) Standards: EN 600- / IEC 600-; HD / DIN VDE / IEC V AC / 0,5 A; 00 VA 00 V DC / 0.5 A; 50 W 8 V AC / DC 0.5 A; 0 VA / 0 W Horizontal 0 Horizontal 0

4 Fill level switch for vertical installation Designs Circular connector with LED and cable socket (S0) Circular connector Mx with LED (S0) Square connector with cable socket () s Contact tube with float Circular connector Mx (-V57-A)! Note! This illustration shows possible different designs of the WS, WS and WS5. The product customizer on the following page allows functional assembly of a complete fill level switch including plug connector, immersion depth, and switching points. Technical data WS / WS / WS5 Technical data Drilling template for assembly Switching element...reed contact Protection class according to DIN EN IP 65 Operating/ media temperature... 0 to + 80 C Media...Mineral and synthetic oils with an effective viscosity of max. 500 mm /s Fitting position...vertical Materials: Flange...Aluminum Contact tube...cuzn Seals...NBR Float...PP M 5 ø ø5 PUB LS/P 59 EN -70-EN

5 Fill level switch for vertical installation Product customizer Order code W S + Product series s and ordered lengths s Minimum Minimum and maximum fill levels Early warning and fill level min. fill level Code ) ) 5 ) max. fill level (dimension A: see drawing p. 6) Code for switching points Code for electrical connection Code for ordered length PUB LS/P 59 EN -70-EN [mm] ) Flat gasket included 00 C9 0 C5 0 C7 V69 W5 C7 0 B7 Y7 W80 B7 0 B97 X6 W B97 50 C08 X W05 Z06 C08 60 E08 X V06 E08 70 D8 X07 W D8 80 B5 X V6 B5 90 E77 Y9 ZG9 E77 00 B V85 W Y87 B 0 D ZE7 W06 D 0 C5 V86 W9 C5 0 C8 V7 W8 C8 0 C79 Z9 V9 C79 50 B X6 W V ZG B 60 F0 Y69 F0 70 D5 ZL8 X8 D5 80 C0 X98 W C0 90 D65 X8 W08 D65 00 B7 X76 W8 V75 B7 5 E8 E8 50 B6 X86 W6 V B6 75 D D 00 B95 V7 W50 V B95 5 D56 D56 50 L69 Y85 W L69 75 E0 E0 500 B8 V9 W7 V7 Y77 B8 550 B8 B8 600 B5 X9 B5 650 C65 C F9 F9 750 E5 E5 800 F9 F9 850 F5 F5 900 L L 000 B70 B70 00 B8 B8 00 F9 F9 00 F77 F77 00 L06 L F8 F8 600 L L Plug connector and visual monitoring Code S0 Order example Description Circular connector with cable socket and LED (DIN EN ) Square connector with cable socket, without LED (DIN EN A) S0 Circular connector Mx with LED -V57-A Circular connector without LED WS5-S0+B7 Fill level switch for minimum level with early warning Circular plug with LED and cable socket (DIN EN ) Length 00 mm 5

6 Fill level switch for vertical installation (with LED) Dimensions, circuit diagrams and functional descriptions WS-S0 5 WS-S0 WS5-S0 For cable ø7 ø9 Can be repositioned 7 ~5 DIN 9-M 0-8,8 ~5 ~5 5 ~00 ~ A MAX for early warning MIN MIN MIN 5 WS-S0 WS-S0 WS5-S0 GN YE +V DC = MINIMUM GN YE +V DC < MAXIMUM = MAXIMUM +V DC GN YE +V DC > EARLY VORWARNUNG WARNING VORWARNUNG EARLY WARNING +V DC M 0V M RD = MINIMUM 0V 5 6 RD 5 6 M = MINIMUM -(0V) Contact diagram for reservoir filled to max. Contact diagram for reservoir filled to max. Contact diagram for reservoir filled to max. level. When operating voltage is applied, the green LED lights up. At minimum fill level, contact opens and contact closes. The yellow LED lights up. Float switch to monitor the minimum and maximum fill level. When operating voltage is applied, the green LED lights up. When the reservoir is full (max. fill level), contact is closed and contact is open. The yellow LED lights up. At minimum fill level, contact 5 opens and contact 6 closes. The red LED lights up. level with early warning. When operating voltage is applied, the green LED lights up. Contact opens and contact closes 5 mm before the minimum fill level. The yellow LED lights up. When the minimum fill level is reached, contact 5 opens and contact 6 closes. The red LED lights up. PUB LS/P 59 EN -70-EN 6

7 Fill level switch for vertical installation (with LED) Dimensions, circuit diagrams and functional descriptions WS-S0 WS-S0 WS5-S0 DIN 9-Mx-8.8 Mx MIN MAX MIN A for early warning MIN WS-S0 WS-S0 WS5-S0 BN +V DC GN BN BU +V DC -(0V) GN BN +V DC BU -(0V) GN RD WH = MINIMUM BU -(0V) BK Mx RD YE WH BK < MAXIMUM Mx RD YE WH BK VORWARNUNG EARLY WARNING Mx Contact diagram for reservoir filled to max. Contact diagram for reservoir filled to max. Contact diagram for reservoir filled to max. PUB LS/P 59 EN -70-EN level. When operating voltage is applied, the green LED lights up. At minimum fill level, contact opens and contact closes. The red LED lights up. Float switch to monitor the minimum and maximum fill level. When operating voltage is applied, the green LED lights up. When the reservoir is full, contact is open. When the fluid level falls below the maximum, contact closes and the yellow LED lights up. When the minimum fill level is reached, contact opens and the red LED lights up. level with early warning. When operating voltage is applied, the green LED lights up. Contact closes 5 mm before the minimum fill level and the yellow LED lights up. When the minimum fill level is reached, contact opens and the red LED lights up. 7

8 Fill level switch for vertical installation Dimensions, circuit diagrams and functional descriptions WS- WS- WS5- For cable ø7 ø9 Can be repositioned 90 ~6 5 ~ 9 DIN9-M MIN 5 ~5 MAX MIN ~5 5 A for early warning MIN ~5 5 5 WS- WS- WS5- MAX Max. 0 V AC = MINIMUM MAX Max. 0 V AC = MAXIMUM MAX Max. 0 V AC EARLY VORWARNUNG WARNING Contact diagram for reservoir filled to max. Contact diagram for reservoir filled to max. Contact diagram for reservoir filled to max. level. At minimum fill level, contact opens and contact closes. Float switch to monitor the minimum and maximum fill level. Contact opens at minimum fill level. Contact closes at maximum fill level. level with early warning. Contact closes 5 mm before the minimum fill level. Contact opens at minimum fill level. PUB LS/P 59 EN -70-EN 8

9 Fill level switch for vertical installation Dimensions, circuit diagrams and functional descriptions WS--V57-A WS--V57-A WS5--V57-A DIN 9-Mx0-8.8 Mx MIN MAX MIN 5 5 A for early warning Switching point MIN WS--V57-A WS--V57-A WS5--V57-A BN V AC/DC BN V AC/DC BN V AC/DC WH = MINIMUM WH WH BU BU NICHT BENUTZT NICHT BENUTZT BU NOT USED NOT USED NICHT NOT USED BENUTZT BK BK = MAXIMUM BK VORWARNUNG EARLY WARNING Mx Mx Mx Contact diagram for reservoir filled to max. Contact diagram for reservoir filled to max. Contact diagram for reservoir filled to max. PUB LS/P 59 EN -70-EN level. At minimum fill level, contact opens and contact closes. Float switch to monitor the minimum and maximum fill level. Contact opens at minimum fill level. Contact closes at maximum fill level. level with early warning. Contact closes 5 mm before the minimum fill level. Contact opens at minimum fill level. 9

10 Fill level switch for horizontal installation Different designs and technical data WS6- WS68 When the oil level falls, the float drops and opens the contact. If turned through 80 and installed in that position, the contact function changes. The contact then closes when the oil level falls. When the fluid level falls, the float drops and opens the contact. Technical data WS6- Technical data WS68 Order number... WS6- ) Switching voltage, max V AC / 00 V DC Switching capacity, max (resistive load) 00 VA / 50 W Switching current, max A Fitting position... Horizontal Temperature range... 0 to + 80 C Media... Mineral and synthetic oils with effective viscosity of max. 500 mm /s Materials: Float... PP Flange... Aluminum Gasket... NBR ) Flat gasket included ) Flat gasket included Order number... WS68 ) Switching voltage, max V AC /DC Switching capacity, max VA/0 W Switching current, max A Fitting position... Horizontal Temperature range... 0 to + 80 C Media... Mineral and synthetic oils with effective viscosity of max. 500 mm /s Materials: Float... NBR Flange... Aluminum Casing... PA Gasket... NBR WS6- WS68 MAX. 0V V AC MAX. 00V V AC DC V AC/DC Contact diagram for reservoir filled to max. NOT NICHT USED BENUTZT Contact diagram for reservoir filled to max. NOT USED PUB LS/P 59 EN -70-EN 0

11 Fill level switch for horizontal installation Dimensions and drilling template WS6-55 min 5 ) 0 WS6- ~0V 0,5A IP Wall thickness: min. mm max. 5 mm Cable ø6 9 ) ) Connector socket can be repositioned in 90 increments ) Minimum clearance from reservoir bottom WS ) 8 0 ø 5 6 Wall thickness: min. mm max 5 mm Cable ø6 9 ) ) Connector socket can be repositioned in 90 increments ) Minimum clearance from reservoir bottom PUB LS/P 59 EN -70-EN Drilling template for assembly for WS6- / WS68 M ø6 ø0 5! Note! These float switches should never be installed in a distorted position. To prevent damage to the switches, they should be subjected to only the static and dynamic loads required by their normal use. To permit optimum functioning, fill level switches WS6- and WS68 must always be installed in a horizontal position.

12 Important information on product usage! SKF and Lincoln lubrication systems or their components are not approved for use with gases, liquefied gases, pressurized gases in solution and fluids with a vapor pressure exceeding normal atmospheric pressure ( 0 mbar) by more than 0,5 bar at their maximum permissible temperature. CAD models for products shown in this brochure can be downloaded at: skf-lubrication.partcommunity.com Further brochures: -00-EN Fittings and accessories -0-EN Gear pump units -70-EN Electric push-to-connect fittings -90-EN Feeding lubricants with centralized lubrication systems SKF Lubrication Systems Germany GmbH Plant Berlin Motzener Str. 5/7 77 Berlin PO Box Berlin Germany This brochure was presented to you by: Tel. +9 (0) Fax +9 (0) SKF is a registered trademark of the SKF Group. SKF Group 06 The contents of this publication are the copyright of the publisher and may not be reproduced (even extracts) unless prior written permission is granted. Every care has been taken to ensure the accuracy of the information contained in this publication. but no liability can be accepted for any loss or damage whether direct, indirect or consequential, arising out of use of the information contained herein. PUB LS/P 59 EN August EN skf.com/lubrication