Schneider Electric 9999SX-6 Electrical Interlock

Schneider Electric's 9999SX6 is an external auxiliary contact kit for NEMA Type S motor starters and contactors, delivering one normally open (NO) contact that mounts externally. It is field-convertible, compatible with Type S devices in sizes 00 through 7, and has a maximum voltage rating of 600 V. The accessory is designed to be easy to service with replaceable parts, supporting simple integration for signaling or interlock logic in motor control circuits. With its external mounting and a single NO contact, the 9999SX6 is used to extend control circuits or monitor the status of a disconnect or starter assembly in industrial applications.