Controllers for cooling applications 900900.042

Technical data

  • Housing dimension ST181 Front: 180x52mm
  • Power supply 230V AC
  • Switching inputs none
  • Number of outputs 4
  • Sensor type PTC
  • ST-Bus available Yes
  • Software 112

Wiring diagram

Dimensional drawing

Product description

The cooling controller ST181-LU3KAR.112 consists of a service plate and a separate power pack plate mounted in a separate casing. It is used for thermostatic temperature regulation in refrigerating plants. The controller is supplied with 230V AC and has four relay outputs as well as an exit for a 40W DC voltage fan. The number of revolutions can be decreased to 20% and thus create a minimum air speed. The relays can be used for different functions, e.g. for a compressor, a defroster, an alarm relay, etc. All inputs and outputs are connected by means of special plug-in connectors at the back of the control unit and easily accessible.
The front is provided with a 3-digit display, six control keys and a group of LEDs. This group indicates the status of the relay exits. The two LEDs on the right show the currently activated data set 1 or 2. A data set consists of setpoint, fan speed control mode and defrosting mode. Parametrisation takes place in several operating levels with increasing security level. The controller is networked via the ST-Bus interface.

Data sheet             Installation instructions

Product quick search.

With Product Quick Search it takes just seconds to find your data sheet and other product information. Simply enter the individual, 9-digit part number and START SEARCH!

We are looking forward to getting in touch.

Do you have questions or would you like to meet in person? Then please contact our experienced sales team! We will be delighted to talk to you.