Knx Cable

Common specifications of KNX bus cables

KNX, as a globally standardized building and home automation system, has a wide range of applications and a variety of product choices. Here are some common specifications for KNX:

Bus specifications:

Wire specifications: KNX buses typically use twisted pair cables, which are typically 2*2*0.8mm in size, consisting of two 2mm wide and 0.8mm thick wires.

Color: Bus harnesses typically contain wires in four colors: red, black, yellow, and white. Among them, red and black are the most commonly used for transmitting data signals (red is positive, black is negative). Yellow and white wires are typically used to provide auxiliary power, but not all KNX devices require these additional wires.

Communication protocol:

KNX uses the EIB (European Installation Bus) protocol as the communication foundation, which supports various communication media such as twisted pair, wireless radio frequency, Ethernet, etc.

The data transfer rate is usually 9.6 kbps, ensuring fast and stable communication.

Power and voltage:

KNX bus systems typically require a bus power supply to provide stable DC voltage. The common bus power supply output voltage is 30V DC, allowing for a certain range of voltage fluctuations to ensure the stable operation of the system.

In actual wiring, it should be ensured that the power supply range of the bus power supply does not exceed its maximum power supply distance to ensure voltage stability and communication reliability.

Equipment specifications:

There are various types of KNX devices, including sensors, actuators, controllers, touch screens, etc. Each device has its specific specifications and functions.

For example, an intelligent switch panel may have multiple functions, such as switch control, dimming, scene settings, etc., and may have different sizes and appearances to adapt to different installation environments and user needs.

Wiring distance and topology:

The KNX bus system supports various topology structures such as star and tree.

When wiring, it should be ensured that the bus length and branch length do not exceed the specified maximum limit to ensure the quality of signal transmission.