The KNX TP Secure Coupler (2 TE) allows the coupling of standard and secure TP lines via a TP backbone. The setup is carried out either by standard KNX data communication or secure commissioning via Data Secure. Telegram rate limit, max. Telegram lengths up to 248 bytes and bu-performance up to 49 telegrams per second optimize the use of modern KNX systems. An OLED display shows important operating parameters such as bus voltage, power consumption and routed telegrams with sender and destination addresses. Topology fault detection and temporary filter shutdown facilitate commissioning media. Flexible group address filters for each of the 32 main groups for main and subline are easily parameterizable.