23/06/2014 www.crouzet.com L2N plug-in filling/emptying function L2N Part number 84870401 Relay for controlling level of conductive liquids Combined fill and empty functions Combined regulation of pumping out a well and filling a tank Plug in (11 pins) Output relay status display LED Sensitivity adjustable from 5 k to 100 k Part numbers 84 870 401 Type Supply voltage Base L2N 24 V AC 11-pin Specifications Supply voltage Un Operating range Max. absorbed power Adjustable sensitivity Measurement accuracy (at maximum sensitivity) Electrode voltage (max) Electrode current (maximum) Maximum cable capacity Response time high level Response time low level Output relay (according to AC1 resistive load) Galvanic isolation via transformer (4 kV, 8 mm creepage distance) Isolation of contacts and electrodes from power supply Temperature limits use (C) Temperature limits stored (C) Weight (g) 230 V, 110 V, 48 V, 24 V AC, 50/60 Hz 0,85 1,15 x Un 3 VA 5 k100 k 0 +30 % 24 V AC (50/60 Hz) 1 mA (50/60 Hz) 10 nF 300 ms 500 ms 1 AgCdO switch 8 A AC max. Class II 2,5 kV AC -20 +60 -30 +70 140 Principles Operating principle Control of maximum and/or minimum levels of conductive liquids (tap water, sea water, waste water, chemical solutions, coffee etc). The principle is based on measurement of the apparent resistance of the liquid between two submerged probes. When this value is lower than the preset threshold on the unit front face, the output relay changes state. To avoid electrolytic phenomena, an AC current funs across the probes. Applications found in environmental, chemical industries and food technology etc. Combined Fill / Empty function The output relay changes state when the level of liquid in the tank reaches the "max" electrode, with the "min" electrode submerged. It returns to its initial state when the "min" sensor is no longer in contact with the liquid. When the level of liquid in the well reaches the "min" electrode, the pump stops. If, on power-up or after a power break, the "max" electrode in the tank is above the surface, reset the device by pressing the PB pushbutton. Unless otherwise specified, the characteristics given are applicable to all or part of the product range selected 23/06/2014 www.crouzet.com Note The probe wire (max length 100 metres) does not have to be screened, but avoid mounting it in parallel with the power supply wires. A screened wire can be used, with the screening connected to the common. No Legend Push button Well Tank Output relay Dimensions (mm) LN2 Dimensions (mm) LN2 : connector sockets 8-pin : 25 622 129 11-pin : 25 622 078 TRADOS Empty Field Connections L2N Unless otherwise specified, the characteristics given are applicable to all or part of the product range selected 23/06/2014 www.crouzet.com Special base : - Pin 5 : common becomes max. - Pin 7 : maxi. becomes common No Legend Push button Output Tank Input Common Wells Unless otherwise specified, the characteristics given are applicable to all or part of the product range selected Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Crouzet: 84870401