LLC2 Series – Open Board Liquid Level Controls 系列 - Littelfuse LLC2 Open Board Liquid Level Controls Provide Superior Protection

系列: LLC2 Series – Open Board Liquid Level Controls
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The LLC2 series is a dual-probe, conductive liquid level control designed for OEM equipment and commercial appliance applications. Models are available for fill or drain operation. Transformer-isolated 12 V ac is provided at the probes to prevent electrolysis. A trickle current of less than 1 mA determines the presence or absence of liquid between the probes and common. On adjustable units, the sensitivity adjustment allows accurate level sensing while ignoring foaming agents and floating debris. The LLC2 series printed circuit board is conformally coated to resist moisture and corrosion.

工作原理

Drain (pump-down mode): When the liquid level rises and touches the high probe, the output relay energizes and remains energized until the liquid level falls below the low probe. The output relay then de-energizes and remains de-energized until the liquid again touches the high probe.

Fill (pump-up mode): When the liquid level falls below the low probe, the output relay energizes and remains energized until the liquid level rises and touches the high probe. The output relay then de-energizes and remains de-energized until the liquid level again falls below the low probe.

功能与特色

  • Isolated 12 V ac voltage on probes
  • Open PCB design
  • Sensitivity adjustment
  • Conformally coated PCB

产品文献

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Catalog #Input
Voltage (V)		Output
Form		Termination TypeMounting MethodDimensionsWeight (lbs/g)Control TypeInput AC Line Frequency (Hz)Input Tolerance (%)Output Load Rating (VA)Output TypeSense Resistance ToleranceSense Resistance (Ohms)Sense VoltageStorage Temperature (F/C)StockSamplesCompare
产品号输入
电压（V）		输出
型式		端接类型安装方法尺寸规格重量（磅/克）Control TypeInput AC Line Frequency (Hz)Input Tolerance (%)Output Load Rating (VA)输出类型Sense Resistance Tolerance感应电阻（Ohms）Sense Voltage储存温度（F/C）库存样品比较
LLC24A2AN 120 Vac绝缘式SPDTTerminal blocks for up to #14 AWG (2.5 mm²) wireSurface mount to probe common with two or four #6 (M3.5 x 0.6) screws4 H x 3 W x 2 D in. (101.6 x 76.2 x 50.8 mm)0公斤Resistance sensing for high and low level detection of conductive liquids50 / 60-0.310 A resistive @ 120/240 Vac and 28 Vdc; 1/3 hp @ 120/240 VacElectromechanical relayGuaranteed rangeAdjustable to 10012 Vac at probe terminals-40° to 80°C (-40° to 176°F)查看 Order
LLC24A2F50N 120 Vac绝缘式SPDTTerminal blocks for up to #14 AWG (2.5 mm²) wireSurface mount to probe common with two or four #6 (M3.5 x 0.6) screws4 H x 3 W x 2 D in. (101.6 x 76.2 x 50.8 mm)0公斤Resistance sensing for high and low level detection of conductive liquids50 / 60-0.310 A resistive @ 120/240 Vac and 28 Vdc; 1/3 hp @ 120/240 VacElectromechanical relay±10%50 fixed12 Vac at probe terminals-40° to 80°C (-40° to 176°F)查看 Order
LLC24B1AC 120 Vac绝缘式SPDT0.25 in. (6.3 mm) male quick connect terminalsSurface mount to probe common with two or four #6 (M3.5 x 0.6) screws4 H x 3 W x 2 D in. (101.6 x 76.2 x 50.8 mm)0公斤Resistance sensing for high and low level detection of conductive liquids50 / 60-0.310 A resistive @ 120/240 Vac and 28 Vdc; 1/3 hp @ 120/240 VacElectromechanical relayGuaranteed rangeAdjustable to 10012 Vac at probe terminals-40° to 80°C (-40° to 176°F)查看 Order
LLC24B2F50N 120 Vac绝缘式SPDTTerminal blocks for up to #14 AWG (2.5 mm²) wireSurface mount to probe common with two or four #6 (M3.5 x 0.6) screws4 H x 3 W x 2 D in. (101.6 x 76.2 x 50.8 mm)0公斤Resistance sensing for high and low level detection of conductive liquids50 / 60-0.310 A resistive @ 120/240 Vac and 28 Vdc; 1/3 hp @ 120/240 VacElectromechanical relay±10%50 fixed12 Vac at probe terminals-40° to 80°C (-40° to 176°F)查看 Order
LLC26A1F25C 230 Vac绝缘式SPDT0.25 in. (6.3 mm) male quick connect terminalsSurface mount to probe common with two or four #6 (M3.5 x 0.6) screws4 H x 3 W x 2 D in. (101.6 x 76.2 x 50.8 mm)0公斤Resistance sensing for high and low level detection of conductive liquids50 / 60-0.310 A resistive @ 120/240 Vac and 28 Vdc; 1/3 hp @ 120/240 VacElectromechanical relay±10%25 fixed12 Vac at probe terminals-40° to 80°C (-40° to 176°F)查看 Order
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