UP 220/21 KNX Pushbutton Interface 2xPotential-Free Contacts LED Output Flush Mount 5WG1220-2AB21
The KNX pushbutton interface is a compact flush-mounted device designed for installation in switch and socket boxes with a diameter of 60 mm. It provides two inputs/outputs configurable for potential-free contacts or for controlling an LED indicator, making it ideal for integrating conventional pushbuttons into a KNX system.
Key Features
- The unit generates its own sensing voltage for potential-free contacts, eliminating the need for an external supply
- Inputs support a maximum cable length of 10 m using unshielded twisted cable
- Input functions include locking via blocking objects, adjustable duration of long button press, and configurable contact type as normally open or normally closed
- Transmission parameters support adjustable cyclic transmission and configurable transmission after bus voltage recovery
- The device evaluates short and long button presses and supports switching on/off/toggle, 8-bit and 16-bit value transmission, single-button dimming, two-pushbutton dimming with stop telegram, and one or two-pushbutton shutter/blind control
- Scene store and recall are available as 8-bit values in conjunction with a scene module
- Pulse counting with limit value monitoring is supported in 8-bit, 16-bit, and 32-bit modes
Technical Specifications
| Communication Protocol |
KNX |
| Contact Inputs |
2 potential-free |
| LED Output Control |
Yes |
| Power Supply |
Bus-powered electronics |
| Bus Coupling Unit |
Integrated |
| Mounting |
60 mm flush boxes |
| Max. Input Cable Length |
10 m |
| Warranty |
24 months |
Typical Applications
- Smart wall switches
- Hotel room control points
- Residential lighting and scene control
- Retrofitting conventional pushbuttons into KNX automation