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Capacitive Limit Switches

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Каталожный номер: T2751
Application
Function principleLimit detection
Maximum or minimum detection in silos with all types of solid granulates, even in dust explosion hazardous areas.
Function and system design
Measuring principleA metal plate at the end of the probe, within the insulation, and the surroundings (e. g. the silo walls) combine to form the two electrodes of a capacitor. If the probe is covered or free of material, then the capacitance changes and the LCL switches.
Input characteristics
Measured variablelimit level (limit value)
Measurement rangeLCL1: dielectric constant &ge 1.6
LCL2: dielectric constant &ge 1.5
Output characteristics
Output signalconnection E5: switching PNP, Imax = 200 mA
- overload and short circuit protection
- residual voltage at transistor at Imax < 2.9 V
connection WA: contact change-over, potential-free
- Umax = 253 V
- Imax = 4 A (AC)
- Pmax = 1000 VA, cos &phi = 1, Pmax = 500 VA, cos &phi > 0.7
Auxiliary energy
Electrical connectionsee section electrical connection
Supply voltageelectrical connection E5: 10.8 ... 45 V DC, short-term pulse on 55 V DC
electrical connection WA: 20 ... 235 V AC, 50/60 Hz or 20 ... 55 V DC
Current consumptionelectrical connection E5: max. 30 mA, reverse-polarity-proof
electrical connection WA: max. 130 mA
Measurement accuracy
Reference operating conditionsvessel type: plastic vessel, ambient temperature: 73 °F (23 °C, 296 K), medium temperature: 73 °F (23 °C, 296 K)
medium pressure pe: 0 bar, medium: dielectric constant = 2.6, conductivity: < 1 µS
sensitivity setting: C
HysteresisLCL1: horizontal 4 mm (0.16 inch), vertical 7 mm (0.28 inch)
LCL2: vertical 5 mm (0.2 inch)
Long-term driftLCL1: horizontal 3 mm (0.12 inch), vertical 6 mm (0.24 inch)
LCL2: vertical 6 mm (0.24 inch)
Influence of medium temperaturedepending on the filling material
Operating conditions
Installation conditions
Installation positionLCL1: optional
LCL2: vertically down
Note the angle of the material mounds and the outlet funnel when determining the mounting point or probe length. The limit switch switches when the probe tip is covered by a few centimetres of material or when it is free material flow should not be directed at the probe.
Mounting locationThe capacitive limit switch can be installed in silos made of different materials (e. g. metal, plastic, concrete).
Ambient conditions
Ambient temperature-40 ... 70 °C (-40 ... 158 °F) (-40 ... 140 °F (-40 ... 60 °C, 233 ... 333 K), dust-Ex version)
see section temperature ranges
Ambient temperature limits-40 ... 80 °C (-40 ... 176 °F) (-40 ... +140 °F (-40 ... +60 °C, 233 ... 333 K), Dust-Ex version)
see section temperature ranges , grey background
Storage temperature-40 ... 80 °C (-40 ... 176 °F)
Shock resistanceprobe: 7J
Overvoltage protectedovervoltage category III
Process conditions
Process temperatureLCL1: -40 ... 120 °C (233 ... 393 K) (-40 ... 80 °C (233 ... 353 K), dust-Ex version)
LCL2: -20 ... 70 °C (253 ... 343 K)
see section temperature ranges
Process temperature limitsLCL1: -40 ... 130 °C (233 ... 403 K) (-40 ... 80 °C (233 ... 353 K), dust-Ex version)
LCL2: -40 ... 80 °C (233 ... 353 K)
see section temperature ranges , grey background
Medium pressure limitsLCL1: -1 ... 25 bar
LCL2: -1 ... 6 bar
Mechanical specifications
Degree of protectionIP66
Mechanical construction
Dimensionshousing: LCL1 Ø94 x 140 mm (3.7 x 5.5 inch), LCL2 Ø94 x 145 mm (3.7 x 5.7 inch)
process connections: see section dimensions
probe: LCL1 length 140 mm (5.5 inch), LCL2 length 500 ... 6000 mm (1.7 ... 20 ft)
MassLCL1: 560 g
LCL2: 1230 g (basic weight for 500 mm probe length)
Materialhousing: PBT-FR with cover in PBT-FR or with transparent cover in PA12, seal of cover: EPDM
cable gland: polyamide or brass, nickel-plated
wetted parts:
- rod probe: PPS Polyphenylenesulphide (glass fiber content 40 %)
- rope probe: armoured steel with HD-PE coating
- other probe components: PPS Polyphenylenesulphide (glass fiber content 40 %)
Certificates and approvals
Explosion-hazardous areaLCL1: DMT 01 ATEX E 122, LCL2: KEMA 01 ATEX 1149 , for additional certificates see www.pepperl-fuchs.com
Type of protectionEx-Hexagon II 1/3D IP66 T97°C (DMT 01 ATEX E122)
Ex-Hexagon II 1/3D [EEx ia] IIB T97°C (KEMA 01 ATEX 1149)
Overspill protectionLCL1: Z-65.13-313 (overspill protection in acc. with WHG)
Каталожный номер: 271947
General specifications
Measuring methodA metal plate at the end of the probe, within the insulation, and the surroundings (e. g. the silo walls) combine to form the two electrodes of a capacitor. If the probe is covered or free of material, then the capacitance changes and the LCL switches.
Equipment architectureThe measuring system consists of:
- the device
- a supply point
- the connected control systems, switching units, signalling systems (e. g. lamps, horns, PCS, PLC, etc.)
Construction typedevice with rod probe
Operating modeMAX = maximum safety:
The device switches if the probe is covered or if the supply voltage is disconnected in a safety-oriented manner (signal on alarm).
example application: overspill protection
MIN = minimum safety:
The device switches if the probe is uncovered or if the supply voltage is disconnected in a safetyoriented manner (signal on alarm).
example application: dry-running protection
Supply
Rated voltageelectrical connection E5: 10.8 ... 45 V DC, short-term pulse on 55 V DC
electrical connection WA: 20 ... 235 V AC, 50/60 Hz or 20 ... 55 V DC
Current consumptionelectrical connection E5: max. 30 mA, reverse-polarity-proof
electrical connection WA: max. 130 mA
Electrical specifications
Surge protectionovervoltage category III
Input
Measured variablelimit level (limit value)
Measurement rangedielectric constant &ge 1.6
Output
Output signalconnection E5: switching PNP, Imax = 200 mA
- overload and short circuit protection
- residual voltage at transistor at Imax < 2.9 V
connection WA: contact change-over, potential-free
- Umax = 253 V
- Imax = 4 A (AC)
- Pmax = 1000 VA, cos &phi = 1, Pmax = 500 VA, cos &phi > 0.7
Directive conformity
Electromagnetic compatibility
Directive 2014/30/EUEN 61326-1:2006 , EN 61326-2-3:2006
Low voltage
Directive 2014/35/EUEN 61010-1:2010
Conformity
Electromagnetic compatibilityNE 21
Degree of protectionIEC 60529:2001
Vibration resistanceEN 60068-2-64
Climate classEN 60068, part 2-38 (test Z/AD)
Measurement accuracy
Reference operating conditionsvessel type: plastic vessel, ambient temperature: 73 °F (23 °C, 296 K), medium temperature: 73 °F (23 °C, 296 K)
medium pressure pe: 0 bar, medium: dielectric constant = 2.6, conductivity: < 1 µS
sensitivity setting: C
Hysteresishorizontal 4 mm (0.16 inch), vertical 7 mm (0.28 inch)
Long-term drifthorizontal 3 mm (0.12 inch), vertical 6 mm (0.24 inch)
Influence of medium temperaturedepending on the filling material
Switching timeapprox. 0.5 s when covering and uncovering the sensor
Operating conditions
Installation conditions
Installation positionany position
Mounting locationThe capacitive limit switch can be installed in silos made of different materials (e. g. metal, plastic, concrete).
Process conditions
Process temperature-40 ... 130 °C (-40 ... 266 °F)
-40 ... 80 °C (-40 ... 176 °F) (Dust-Ex version)
Medium pressure limits-1 ... 25 bar
State of aggregationfluids and solids
Solid contents&le &empty 30 mm
Bulk density&le 200 g/l
Ambient conditions
Ambient temperature-40 ... 80 °C (-40 ... 176 °F)
-40 ... 60 °C (-40 ... 140 °F) (Dust-Ex version)
Storage temperature-40 ... 80 °C (-40 ... 176 °F)
Shock resistancedevice with F34 housing: 7 J
Vibration resistancea(RMS) = 50 m/s2, ASD = 1.25 (m/s2)2/Hz, f = 5 to 2000 Hz, t = 3 x 2 h
Mechanical specifications
Degree of protectionIP66, NEMA 4
Connectiongland M20
thread G1/2, NPT1/2
MaterialF14 housing: polyester PBT-FR
F34 housing F34: aluminum
Probe: PPS GF40
Dimensionsmax. &empty94 mm (3.7 inch), length 391 mm (15.4 inch)
Process connectionthread R1 acc. to EN 10226, BSPT, adapter for R1-1/2 and G1-1/2 see accessories
thread NPT1 to ANSI B 1.20.1, adapter for NPT1-1/4 see accessories
Data for application in connection with hazardous areas
EU-Type Examination Certificatesee instruction manuals (SI)
Directive conformity
Directive 2014/34/EUEN 60079-0:2012+A11:2013 , EN 60079-11:2012 , EN 60079-31:2009
Accessories
Optional accessoriesLCL-Z10 cover with sight glass for F14 housing
LCL-Z11 adapter for R1-1/2, EN 10226
LCL-Z12 adapter for G1-1/2, DIN ISO 228
LCL-Z13 adapter for NPT1-1/4, steel
LCL-Z15 adapter for NPT1-1/4, 1.4571
Каталожный номер: 271956
General specifications
Measuring methodA metal plate at the end of the probe, within the insulation, and the surroundings (e. g. the silo walls) combine to form the two electrodes of a capacitor. If the probe is covered or free of material, then the capacitance changes and the LCL switches.
Equipment architectureThe measuring system consists of:
- the device
- a supply point
- the connected control systems, switching units, signalling systems (e. g. lamps, horns, PCS, PLC, etc.)
Construction typedevice rope probe
Operating modeMAX = maximum safety:
The device switches if the probe is covered or if the supply voltage is disconnected in a safety-oriented manner (signal on alarm).
example application: overspill protection
MIN = minimum safety:
The device switches if the probe is uncovered or if the supply voltage is disconnected in a safetyoriented manner (signal on alarm).
example application: dry-running protection
Supply
Rated voltageelectrical connection E5: 10.8 ... 45 V DC, short-term pulse on 55 V DC
electrical connection WA: 20 ... 235 V AC, 50/60 Hz or 20 ... 55 V DC
Current consumptionelectrical connection E5: max. 30 mA, reverse-polarity-proof
electrical connection WA: max. 130 mA
Input
Measured variablelimit level (limit value)
Measurement rangedielectric constant &ge 1.6
Output
Output signalconnection E5: switching PNP, Imax = 200 mA
- overload and short circuit protection
- residual voltage at transistor at Imax < 2.9 V
connection WA: contact change-over, potential-free
- Umax = 253 V
- Imax = 4 A (AC)
- Pmax = 1000 VA, cos &phi = 1, Pmax = 500 VA, cos &phi > 0.7
Directive conformity
Electromagnetic compatibility
Directive 2014/30/EUEN 61326-1:2006 , EN 61326-2-3:2006
Low voltage
Directive 2014/35/EUEN 61010-1:2010
Conformity
Electromagnetic compatibilityNE 21
Degree of protectionIEC 60529:2001
Vibration resistanceEN 60068-2-64
Climate classEN 60068, part 2-38 (test Z/AD)
Measurement accuracy
Reference operating conditionsvessel type: plastic vessel, ambient temperature: 73 °F (23 °C, 296 K), medium temperature: 73 °F (23 °C, 296 K)
medium pressure pe: 0 bar, medium: dielectric constant = 2.6, conductivity: < 1 µS
sensitivity setting: C
Hysteresisvertical 5 mm (0.2 inch)
Long-term driftvertical 6 mm (0.24 inch)
Influence of medium temperaturedepending on the filling material
Switching timeapprox. 0.8 s when covering and uncovering the sensor
Operating conditions
Installation conditions
Installation positionvertically down
Mounting locationThe capacitive limit switch can be installed in silos made of different materials (e. g. metal, plastic, concrete).
Process conditions
Process temperature-40 ... 80 °C (-40 ... 176 °F)
Medium pressure limits-1 ... 6 bar
State of aggregationsolids
Solid contents&le &empty 30 mm
Bulk density&le 200 g/l
Ambient conditions
Ambient temperature-40 ... 80 °C (-40 ... 176 °F)
-40 ... 60 °C (-40 ... 140 °F) (Dust-Ex version)
Storage temperature-40 ... 80 °C (-40 ... 176 °F)
Shock resistancedevice with F34 housing: 7 J
Vibration resistancea(RMS) = 50 m/s2, ASD = 1.25 (m/s2)2/Hz, f = 5 to 2000 Hz, t = 3 x 2 h
Mechanical specifications
Degree of protectionIP66, NEMA 4
Connectiongland M20
thread G1/2, NPT1/2
MaterialF14 housing: polyester PBT-FR
F34 housing F34: aluminum
Probe: PPS GF40
probe rope: PE-HD
probe rope seal: VMQ
Dimensionsmax. &empty94 mm (3.7 inch), length 140 mm (5.5 inch) + L
L = 500 ... 6000 mm (19.7 ... 236 inch)
Process connectionthread R1-1/2 acc. to EN 10226, BSPT
thread NPT1-1/2 to ANSI B 1.20.1
Data for application in connection with hazardous areas
EC-Type Examination Certificatesee instruction manuals (SI)
Directive conformity
Directive 2014/34/EUEN 60079-0:2012+A11:2013 , EN 60079-11:2012 , EN 60079-31:2009
Accessories
Optional accessoriesLCL-Z10 cover with sight glass for F14 housing
LCL-Z14 rope shortening set

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