KNX/EIB 2-pair cable is a specialized communication cable designed for building automation systems, featuring two twisted pairs of solid copper conductors (typically 2 × 2 × 0.8 mm) with PVC, LSZH & PE insulation, color-coded cores (black/red and white/yellow), and an aluminium/polyester foil shield with drain wire for reliable data transmission and protection against interference; its distinctive green sheath (RAL 6018) ensures easy identification, while flame-retardant, halogen-free, and UV-resistant versions make it suitable for safe indoor installations, public buildings, and outdoor use, supporting applications such as lighting, HVAC, security, and smart home control.