Theben KNX Push-Button Interface Binary Input 2-Channel TA 2.1 KNX (4969272)

The Theben TA 2.1 KNX is a 2-channel binary input interface for KNX bus systems, enabling the integration of potential-free contacts such as push buttons, switches, or relays. It converts contact states into KNX telegrams, supporting functions like switching, dimming, blinds control, value transmission, and scene recall. Compact and flush-mounted, it fits into standard flush-mounted boxes with an installation depth of approximately 12 mm.

Advantages

Two independent channels allow connection of multiple conventional switches or push buttons to the KNX bus. The interface is configured with ETS software, providing flexibility in function assignment. Its flush-mounted design and low profile make it suitable for installation behind standard wall switches or in junction boxes.

Suitable for

• Integrating existing push buttons into KNX smart home systems
• Controlling lighting, blinds, or scenes via conventional switches
• Retrofitting buildings with KNX automation without replacing switch hardware

Key specifications

• Number of channels: 2
• Input type: Binary, potential-free contacts
• Bus system: KNX (TP)
• Mounting type: Flush-mounted in standard flush-mounted box
• Supported functions: Switching, dimming, blinds control, value transmitter, scene recall
• Input cable length: Up to 10 m
• KNX bus voltage: 21–32 V DC
• Current consumption (KNX): Approx. 5 mA
• Protection class: IP20
• Operating temperature range: -5 °C to +45 °C
• Connection type: KNX bus terminal, screw terminals for inputs
• LED indicator: 1x red (programming)
• Housing material: Plastic
• Installation depth: Approx. 12 mm

Recommendations

For reliable integration of conventional switches into KNX installations, the TA 2.1 KNX offers a compact and flexible solution, easily configured via ETS.