L-ED3

Conductive level indicators

Intended use

The conductive control level relay L-ED 3 with the conductive probes is used to control 3 levels or to keep between 2 points the level of conductive liquids like water, oil, chemical products, etc., in 3 tanks or 3 recipients.

Conductive probes could be supplied under request.

Function

The conductive level indicator L-ED 3 bases its work in the conductivity of the liquids to control. They have 3 level controllers associated with a relay. They can work independently or related.

It is necessary an electrode or a probe for each level and a common electrode. If the tank is conductive, it could be used as the common electrode.

If many relays will be used to control only 1 tank, it would be enough to mount a jumper connection between the common of the probes related to the relays.

If only 1 independent signal, maximum or minimum, should be indicated, it would be enough to connect the reference, a probe and mount a jumper connection of the connections of the probe.

Mechanical connection

It is simple: the device has to be installed in a DIN rail using the undecal socket. The connection of the probe/s depends on each application and the requested models of the probes.

Dimensions

Approximate measures given in mm.

Technical data


Name	Level control relay
Type	L-ED-3 – ref: 2750-3...
Supply voltage:
2750-3-230	230 V AC (50 – 60 Hz)
2750-3-115	115 V AC (50 – 60 Hz)
2750-3-024	24 V AC (50 – 60 Hz)
Power consumption	3.2 VA
Galvanic isolation	Yes
Max. cable section	Ø 1 – 2,5 mm² of a good insulation cable and normally without shielding. If the cable are connected in parallel, it is recommended the installation of shielded cable and with earth connection. The minimum insulation resistance should be minimum 200 kΩ.
Maximum cable length	150 m, without shielding (depending on cable type and the application)
Relay output AC mod. for load	Resistive AC 8 A / 250 V Resistive DC 0,25 A / 200 V, 8 A / 24 V Inductive AC 2,5 A / 250 V Inductive DC 4 A / 24 V
Function status	Relay engaged: red LED Under voltage: green LED
Ambient temperature	-20° C – +50° C
Relative humidity	30 % – 85 % HR
Protection	IP20B according to DIN EN60529
Weight	0,47 Kg
Current in probes line	4 mA
Voltage in probes line	24 V AC
Insulation voltage	2.500 V AC
Insulation resistance	>10⁴ MΩ
Mechanical life	30x10⁶ operations
Sensitivity	7 – 100 kΩ
Materials:
Base	Poliamyde 6.6
Terminals	Brass