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KNX-40E-1280 - KNX-40E-1280 1280mA Bus Power Supply

The KNX-40E-1280 (D) is a high efficiency power supply suitable for a variety of applications, from intelligent home control to security systems.



The KNX Power Supply KNX-40-1280 (D) is a 1280mA power supply with high efficiency and a small footprint of only 4SU. 

The device has a a KNX bus choke output and an additional output for ancillary power. 

Operating at a wide temperature range of -30~+70°c, the KNX-40E-1280 (D) is suitable for a range of applications. 

LED indicators are used in case of normal operation, overload conditions and RESET operation. 

The KNX-40-1280 (D) can be used with any KNX trademarked products, and is engineered to be a reliable and safe solution for the KNX bus environment. 

Additional information

Weight 0.17 kg

180 ~ 264VAC





  • EIB/KNX power supply with integrated choke
  • Compact size
  • Safety extra low voltage (SELV)
  • Suitable for TPI-256
  • 180~264VAC input
  • Short circuit protection, overload protection and over voltage protection
  • Cooling by free air convection
  • Isolation class I
  • LED indicator for normal operation, bus reset and bus overload
  • Monitoring of output voltage, output current, bus traffic load and device temperature
  • Wide variety of diagnostics and logic function
  • Over voltage category III
  • 3 years warranty
  • Intelligent home control
  • Modern building automation
  • Lighting control
  • HVAC system
  • Security system
  • Blinds and shutters
  • Monitoring systems
  • Energy management
  • Alarm monitoring