23/06/2014 www.crouzet.com
L2N plug-in filling/emptying function L2N Part number 84870404
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 kto 100 k
Part numbers
Supply voltage Base
Type
84 870 404 L2N 230 V AC 11-pin
Specifications
Supply voltage Un 230 V, 110 V, 48 V, 24 V AC, 50/60Hz
Operating range 0,851,15xUn
Max. absorbed power 3 VA
Adjustable sensitivity 5 k100k
Measurement accuracy (at maximum sensitivity) 0+30%
Electrode voltage (max) 24 V AC (50/60Hz)
Electrode current (maximum) 1mA (50/60Hz)
Maximum cable capacity 10 nF
Response time high level 300 ms
Response time low level 500 ms
Output relay (according to AC1 resistive load) 1 AgCdO switch 8 A AC max.
Galvanic isolation via transformer (4 kV, 8 mm creepage
Class II
distance)
Isolation of contacts and electrodes from power supply 2,5 kV AC
Temperature limits use (C) -20+60
Temperature limits stored (C) -30+70
Weight (g) 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 thema electrode, with themi electrode submerged. It returns to its initial state when themi sensor is no longer in
contact with the liquid.
When the level of liquid in the well reaches themi electrode, the pump stops.
If, on power-up or after a power break, thema 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 selected23/06/2014 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.
o
Legend
N
Push button
Well
Tank
Output relay
Dimensions (mm)
LN2
Dimensions (mm)
LN2: connector sockets
8-pin: 25622129
11-pin: 25622078
TRADOSEmptyField
Connections
L2N
Unless otherwise specified, the characteristics given are applicable to all or part of the product range selected