Schneider Electric 9999SX6 Logic Controller Module

Schneider Electric’s Square D 9999SX6 is an external auxiliary contact module for Type S NEMA motor starters and contactors, providing one normally open (NO) contact to the control circuit. It is designed for field installation on Type S devices in sizes 00 through 7 and is rated for up to 600 VAC, enabling reliable signaling or interlock applications without modifying the main power contacts. The 9999SX6 is field-convertible, allowing quick adaptation to changing control needs, and it operates as a separate contact path that can be wired to sense coil status, drive interlocks, or feed PLC/relay logic. This accessory expands the functionality of Square D Type S assemblies by adding a dedicated control contact in a compact, externally mounted package. In practice, it’s commonly used to provide status feedback or control signals in motor-control panels, automation racks, and other industrial control setups that rely on Type S contactors. The 9999SX6 is part of Schneider Electric’s 9999 SX family of accessories, and it is compatible with related Square D components such as 8502S/8702S lineups, offering a straightforward way to augment existing starters with an external, field-configurable NO contact.