UD/S4.210.2.1 KNX LED Dim Actuator: 4x210W Universal & LEDi Optimized
The UD/S4.210.2.1 supports advanced installation flexibility with a separate N-connection per channel and allows for manual operation and programming without applied 230V supply voltage, making commissioning highly efficient.
1. UD/S4.210.2.1 KNX LED Dim Actuator: Universal Dimming and Scalability
The actuator is engineered for high-performance control across various lighting technologies and applications.
Dimming Technology & Capacity:
- Channels: 4 independent dimming channels.
- Optimized for LEDi: Excellent dimming performance for dimmable 230 V~ LEDi in both trailing edge (up to 4 x 210 W/VA) and leading edge (up to 4 x 80 W/VA) control.
- Universal Compatibility: Suitable for Incandescent, HV Halogen, LV Halogen, and dimmable energy-saving lamps.
- Power Scaling: Outputs can be connected in parallel in any configuration to boost output power up to 1 x 600 W/VA.
Control and Installation Features:
- Detection: Features Automatic load detection to optimally manage connected loads.
- Wiring: Separate N-connection per channel provides flexible and robust wiring.
- Commissioning: Manual operation possible on the device, even without bus voltage or in an unprogrammed status.
- Diagnostics: Offers Extensive test and diagnosis functions via the i-Bus tool for fast troubleshooting.
2. Technical Details and Installation
A high-capacity module designed for professional DIN-Rail integration.
- Installation: Designed for professional DIN-Rail installation, occupying 6 modular spacings (105 mm width).
- Voltage: Supports a wide nominal voltage range of 110 … 230 V AC/DC (50/60 Hz).
- Bus System: Integrated KNX bus coupler for Twisted Pair Wiring. Commands can originate from a KNX Presence Sensor or a KNX Touch Panel .










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