The GDA16SD is a connection module, categorized as a busbar accessory for Carlo Gavazzi motor control systems. Its specific purpose is to provide a direct and secure connection between a GMS-32S manual motor starter and components in the CGMS-6D to CGMS-12D series. This module simplifies the wiring and assembly of motor starter combinations on a busbar system. It is utilized in industrial control panels for group motor installations where these specific component pairings are required.