Square D LA9D4002 Mechanical And Electrical Interlock

Schneider Electric TeSys D LA9D4002 is a combined mechanical and electrical interlock kit designed for use with two LC1D80-D95 contactors (AC coil) in TeSys Deca reversing and changeover applications. The interlock pairs a robust mechanical interlock with an electrical interlock block to ensure that only one of the two contactors can be energized at a time, enabling safe forward/reverse motor operation and preventing simultaneous actuation during direction changes. Specifically built for the TeSys D family, LA9D4002 simplifies reversing circuits by providing reliable interlock between LC1D80 and LC1D95 devices, reducing the need for additional control logic. Typical applications include reversing drives in conveyors, hoists, and other machinery requiring dual-direction control, where safe sequencing of contactors is critical. When installed with LC1D80-D95 coils, this interlock supports safe, interlocked operation within a two-contactor changeover arrangement, contributing to improved machine safety and reliability in industrial control panels. Designed to integrate with the TeSys D lineup, the LA9D4002 offers a compact, purpose-built solution for mechanically and electrically interlocking paired contactors in reversing configurations.