Syrelec, Brand of Crouzet Control 84870403 Data Sheet

Plug-in Mount 39 mm L2N Part number 84870403

Relay for controlling level of conductive liquids
Output relay status display LED
Sensitivity adjustable from 5 kΩto 100 kΩ

LN

Relay for controlling level of conductive liquids
Regulation of two levels : minimum, maximum
Empty function
Plug in (8 or 11 pins)
Sensitivity adjustable from 5 kΩto 100 kΩ

LN2

Combined fill and empty functions
Combined regulation of pumping out a well and filling a tank
Plug in (11 pins)

Part numbers

Specifications

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

Type

Supply voltage

Base

84 870 403

L2N

120 V AC

11-

pin

Supply voltage Un

230 V, 110 V, 48 V, 24 V AC, 50/60 Hz

Operating range

0,85→1,15xUn

Max. absorbed power

3 VA

Adjustable sensitivity

5 k

Ω

→100k

Ω

Measurement accuracy (at maximum sensitivity)

0→+30%

Electrode voltage (max)

24 V AC (50/60 Hz)

Electrode current (maximum)

1 mA (50/60 Hz)

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
distance)

Class II

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

20/10/2014 www.crouzet.com

Unless otherwise specified, the characteristics given are applicable to all or part of the product range selected

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.

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.

TRADOS Empty Field

N

o

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

Connections

L2N

20/10/2014 www.crouzet.com

Unless otherwise specified, the characteristics given are applicable to all or part of the product range selected