Description
Introduction
The GEWISS GW90709 is a KNX-certified bus power supply unit designed to deliver stable and reliable power to KNX automation systems. Tailored for residential applications as well as small-to-medium office environments, this core infrastructure component ensures dependable communication across all connected bus devices. This device is part of our KNX system components range.

Engineered with integrated protection mechanisms, the unit accepts a standard 220-240V AC input at 50/60 Hz and supplies a 320mA output current to the KNX line. Its 4-DIN module enclosure offers straightforward installation on standard mounting rails within indoor distribution assemblies.
Key Features
- KNX bus output current: 320mA
- Operating supply voltage: 220-240V AC (50/60 Hz)
- Built-in protection functionality
- 4-DIN module enclosure size
- Mounting: Standard DIN rail mountable
- Ingress protection rating: IP20
Benefits
- Compact 4-DIN module width optimizes valuable enclosure space on distribution panels.
- Integrated protection mechanisms shield the bus line against electrical disturbances.
- Delivers a consistent 320mA current suitable for powering small-to-medium KNX line segments.
- Seamless integration within GEWISS KNX building automation architecture.
- Designed for standard 220-240V AC power networks operating at 50/60 Hz.
Technical Specifications
Applications
- Providing KNX bus line power in smart residential installations.
- Powering KNX device networks in small and medium-sized office environments.
- Integration into standardized indoor distribution boards requiring a 320mA KNX supply.
Installation Notes
- Mount securely on a standard 35mm DIN rail inside an appropriate IP-rated cabinet.
- Connect mains power supply (220-240V AC, 50/60 Hz) in compliance with local electrical safety regulations.
- Verify that total bus device current requirements do not exceed the 320mA rating of the unit.
- Confirm model number GW90709 against Bill of Quantities (BOQ) specifications prior to wiring.
Developer Resources
- Refer to official GEWISS technical datasheets for detailed wiring schematics and line planning guidance.
- Import product parameters into ETS software tools for accurate KNX topology and bus line design.
FAQ
What is the output current rating of the GEWISS GW90709?
The GEWISS GW90709 provides a 320mA rated current to power connected KNX bus devices. Explore more GEWISS KNX products for professional building automation projects.
What input voltage does the GEWISS GW90709 require?
This unit operates on standard mains power of 220-240V AC at 50/60 Hz.
How many DIN modules does this power supply occupy?
The GEWISS GW90709 occupies 4 DIN modules on a standard mounting rail.
Is the GEWISS GW90709 suitable for outdoor installation?
The unit carries an IP20 rating, meaning it must be installed inside a protective enclosure or indoor distribution board.
What is the exact product model?
The order/model code for this page is GW90709. Match it against project documents before purchase.
Who is the manufacturer?
This product is manufactured by GEWISS.
Conclusion
The GEWISS GW90709 320mA power supply is a compact, dependable foundation for KNX automation lines in homes and commercial offices. Featuring integrated protection and standard DIN-rail mounting, it provides steady power delivery across your system topology. Installers and system integrators can review our dealer and project support options.
Always double-check project line calculations and consult official GEWISS documentation to verify compatibility prior to ordering.






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