RTU40 for outdoor substations

Kuumic Oy has delivered thousands of  RTU40 units during past twenty years around Finland.
The simple structure has proven to be reliable and easy to maintain during years.
With the RTU-update kits lifetime of the RTU's can be extended  easily and cost effectively.


  • Powernet charger(s)
  • I/O for 1-6 motor drives
  • Heater and air ventilation
  • Charge control for batteries
  • 2 x RS232 interface for SCADA-communication
  • 1 x RS232 ja 1 x RS485 interfaces for option communications


  • Battery capacity test
  • Door alarm switch
  • Floating outputs
  • Charge balance
  • V21/V23-modem
  • Light and mains power socket
  • Deep discharge protection
  • Current measurement (own usage)
  • Dual battery chargers 2x12V
  • 48VDC, 60VDC ja 110VDC versions


  • IEC60870-5-104/103/101
  • ANSI X3.28
  • Telegyr 800
  • Modbus RTU
  • Procol
  • SPA
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