UD/S4.315.2.1 KNX Universal Dimmer 4 Channel: High-Power LEDi Actuator
1. UD/S4.315.2.1 KNX Universal Dimmer: Performance and Load Capacity
The actuator’s design is focused on high power output and broad compatibility across all modern dimmable light sources.
Core Functionality:
- Universal Load Type: Automatically adapts to Incandescent, Halogen, Low-Voltage Halogen (with L/C transformers), and LEDi Retrofit lamps.
- High-Capacity Outputs: Features 4 independent outputs, delivering a nominal power of 4 x 315 W/VA (Trailing Edge) or 4 x 120 W/VA (Leading Edge).
- Load Grouping: Outputs can be connected in parallel in groups to increase output power up to 2 x 500 W/VA.
- Minimum Load: Supports extremely low power consumption with a minimum load requirement of just 2 W.
- LEDi Optimization: Optimized for dimming retrofit LED lamps, ensuring smooth operation across all phases.
2. Installation, Diagnostics, and Control
The UD/S4.315.2.1 is engineered for simple integration and robust, reliable operation.
- Simplified Wiring: Features separate N-connection per channel.
- Programming Flexibility: Supports programming and manual operation on the device even without applied 230V supply voltage or bus voltage.
- Diagnostics: Includes extensive test and diagnosis functions for the i-Bus tool and fast parameter setting in ETS using copyable channel templates.
- Control Integration: Pairs easily with KNX interfaces, such as the Oria KNX Thermostat Switch (Internal Link), for integrated scene and dimming control.











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