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  5. Capacitive Limit Switches
  6. LCL1

LCL1 Capacitive limit switch

Key Benefits at a Glance

  • Limit switch for bulk solids
  • Device with rod probe
  • Complete unit consisting of the probe and electronic insert
  • Integrated active build-up compensation: exact switch point, even with strong build-up
  • Mechanically rugged: no wearing parts, long operating life, maintenance-free

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Product photo: Capacitive limit switch LCL1
Product photo: Capacitive limit switch LCL1
Product Compliance: USA - CSA
Approval
Approval
Product Compliance: Europe – CE
Note

All product-related documents, such as certificates, declarations of conformity, etc., which were issued prior to the conversion under the name Pepperl+Fuchs GmbH or Pepperl+Fuchs AG, also apply to Pepperl+Fuchs SE.

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DatasheetClassificationProduct DocumentationApprovals

Technical data of LCL1

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
SeriesLCL1
Rated voltageUrelectrical 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
Surge protectionovervoltage category III
Measured variablelimit level (limit value)
Measuring rangedielectric constant ≥ 1.6
Switch-on delaytoncorrect switching after max. 1.5 s
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 φ = 1, Pmax = 500 VA, cos φ > 0.7
Signal on alarmconnection E5: < 100 µA
connection WA: relay de-energized
Electromagnetic compatibility
Directive 2014/30/EUEN 61326-1:2006 , EN 61326-2-3:2006
Low voltage
Directive 2014/35/EUEN 61010-1:2010
Electromagnetic compatibilityNE 21
Degree of protectionIEC 60529:2001
Vibration resistanceEN 60068-2-64
Climate classEN 60068, part 2-38 (test Z/AD)
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
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 aggregationsolids
Solid contents≤ ∅ 30 mm
Bulk density≤ 200 g/l
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
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. ∅94 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
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
Supplementary documentationtechnical information (TI)
manuals, brief instructions (BA, KA)
instruction manuals (SI)
Supplementary informationObserve the certificates, declarations of conformity, instruction manuals, and manuals where applicable. For information see www.pepperl-fuchs.com.
Designation- LCL-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
General Notes
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