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EC-L-3x12A-MT34-DOL-WM | Wilo


Article number: 2543230
Technical data
Tender text

Microcontroller-controlled switchgear for level-dependent control of three submersible pumps using analogue signal transmitters. Individual parameters are entered via symbol-based menu navigation and an operating button.


  • Two different operating modes for a broad field of application:
    • “Drain” operating mode: For draining sewage chambers
    • “Fill” operating mode: For filling water tanks and rainwater storage tanks
  • Configurable overload protection
  • Thermal motor monitoring
  • Pump kick function
  • Adjustable follow-up time
  • Automatic pump alteration
  • Service life optimisation
  • Standby pump
  • Automatic fault-actuated switchover
  • Direction of rotation monitoring
  • High water alarm with forced switch-on of the connected pumps
  • Dry-running protection
  • Fault memory for 10 error messages including the type of fault
  • Operating mode “Ex” for loading preset values for “Ex” applications (please note information given under “Configuration”!)


  • Display of the current operating status and data, as well as faults via the LCD display and LEDs
  • Symbol-based menu navigation
  • Main switch
  • Configuration of operating parameters and operation via operating button
  • Remote access via ModBus
  • Integrated alarm buzzer


  • 1x analogue precision input 4 – 20 mA for level control with level sensor
  • 3x digital inputs for level control with float switch (max. 2 pumps)
  • 1x digital input for low water level with float switch (dry-running protection)
  • 1x digital input for high water signal with float switch (high water alarm)
  • 3x inputs for thermal winding monitor with bimetallic temperature sensor, connection of PTC sensors is not possible!
  • 3x inputs for connecting moisture sensors (e.g.: motor compartment leakage or sealing chamber monitoring)
  • 1x digital input for External On/Off for remote activation and deactivation of automatic mode


  • 1x potential-free contact* for the collective run signal (SBM)
  • 1x potential-free contact* for the collective fault signal (SSM)
  • 1x potential-free contact* for the individual run signal (EBM) per pump
  • 1x potential-free contact* for the individual fault signal (ESM) per pump
  • 1x 24 VDC output for connecting an external alarm signal
  • 1x analogue output 0-10 V for the output of the actual level value

*Note: Power supply must be provided by the customer!


  • Signal transmitter to be provided on-site.
  • Switchgears are not protected against explosions and may only be used outside potentially explosive atmospheres.
  • Signal transmitters within potentially explosive atmospheres must be connected through an intrinsically safe circuit, e.g. Zener barrier or Ex cut-off relay.
  • Pumps within potentially explosive atmospheres can be directly connected.
Technical data
Max. number of controllable pumps 3
  • 1
  • 3
Rated voltage U 220/230/380/400 V
Mains frequency f
  • 50 Hz
  • 60 Hz
Min. rated current I 1 A
Max. rated current per pump I 12 A
Activation type Direct On Line (DOL)
Protection class IP54
Material, housing PC
Length L 190 mm
Width W 370 mm
Height H 200 mm
Net weight, approx. 3.2 kg
Make Wilo
Item no. 2543230

Installation and operating instructions

Wilo-Control EC-L

Article Number 2543252
Edition 2022-09
Page format 209.9 x 297.0 mm
Number of pages 64
PDF (8 MB)

Installation and operating instructions (digital)

Wilo-Control EC-L

Article Number 2543252
Edition 2018-12
HTML (17 MB)

Certificate REACH

REACH Regulation

Edition 2021-05
Page format 209.9 x 297.0 mm
Number of pages 4
PDF (212 KB)