Compressor controller: SIGMA CONTROL 2

Integrated intelligence

SIGMA CONTROL 2 coordinates compressed air generation and consumption. With its intelligent control, this advanced controller prevents inefficient energy usage, especially in part load operation. SIGMA CONTROL 2 is based on advanced industrial computing technology to protect the unit as well as allow networking and remote monitoring of system status and operations. Interchangeable input and output modules enable flexibility for working with to external communications systems. SC2 is available on all Kaeser screw compressors (except AIRTOWERS) as well as integrated blower and DNC booster packages.         

SIGMA CONTROL 2: for all rotary screw compressors, rotary screw blowers, and rotary lobe blowers

SIGMA CONTROL 2 is based on advanced industrial computing technology. Interchangeable input and output modules enable flexibility for working with Kaeser rotary screw compressors, rotary screw blowers, reciprocating compressors, and rotary lobe blowers, as well as to external communications systems.

The benefits of SIGMA CONTROL 2

  • Troubleshooting support:
    The industrial PC saves the last 200 operational events, helping you and Kaeser Support quickly find and reproduce faults. Furthermore, the built-in web server enables you to display operational data, maintenance and fault messages on any PC.
  • Easy operation:
    Intuitive menu navigation and 30 available languages simplifies controller operation
  • Quick software updates:
    Software updates and operating parameters can be quickly uploaded and transferred via the SD card slot. This minimizes service costs and allows the SD card to be used for (long-term) storage of key operational data.


Take a closer look at our SIGMA CONTROL 2

SIGMA CONTROL 2 equipment

Controller systems

  • Modular design includes control unit, input/output modules, network components and web server
  • Designed for use with Kaeser rotary screw compressors, integrated blower packages, vacuum screw packages, and compact booster packages
  • "Traffic-light" LEDs for at-a-glance operational status
  • Plain text display
  • 30 selectable languages
  • Fully automated monitoring and control
  • Selection of Dual, Quadro, Vario, Dynamic (dependent on compressor size) and continuous control as standard
  • Timer
  • Base-load sequencing function when operating two compressors
  • Web server with operational data remote display


  • Advanced processor hardware
  • All components designed for industrial operating conditions
  • Graphical display: Graphs showing pressure and compression temperature
  • LED indicators and tactile membrane keys
  • Real-time clock battery buffered
  • Precision electronic pressure transducer

Control cabinet

  • Dust & water-resistant, IP 54
  • Input/output modules with confusion-proof plug-in connectors for the signal sensor connection cable
  • Terminal strip for additional floating contacts


  • SD card slot for updates and long-term storage of operational data
  • USS bus for frequency converter
  • RFID reader (Radio Frequency Identification)
  • Ethernet
  • Slot for communications modules


  • CE
  • cULus
  • EMC
  • Marine certifications GL, ABS, LRS, DNV
  • International radio certification for RFID (FCC, CMIIT, MIC/KS and C–Tick)

Web server

  • Control panel and menu structure visualisation, e.g. event history and display of graphs

Options, accessories

Plug-in communication modules for:

  • Profibus DP-VO
  • Modbus TCP
  • DeviceNet
  • Modbus RTU

SIGMA CONTROL 2 – Technical data

The technical specifications can be found in this brochure: