The ABB Symphony Plus VRBX01K04 Compact Bus Extension Kit Vertical (2VAA009362R1) is designed to enhance the expansion capabilities of the Symphony Plus control system. This vertical extension kit enables seamless integration and communication within multi-node architectures, facilitating improved scalability and operational efficiency. Engineered for robust performance, the kit ensures reliable connectivity and supports a variety of configurations to meet diverse application requirements in industrial automation. Its compact design optimizes space utilization while maintaining excellent serviceability and accessibility for maintenance operations. The VRBX01K04 is an essential component for achieving a flexible and efficient control network in complex industrial environments.