Schneider Electric TSX-RKY12 12 Slot Extension Rack

Schneider Electric's TSX-RKY12 extension rack (often listed as TSXRKY12EX) is a 12-slot extendable chassis for Modicon Premium PLC systems, purpose-built for multi-rack configurations. It provides a 12-position backplane to host I/O modules and other rack components, and it connects to neighboring racks via Bus X extension cables to form a single, scalable control architecture. In a typical installation, up to eight TSX RKY12EX racks can be configured in a system, with the 12-slot rack effectively functioning as two combined racks of 4-, 6-, or 8-slots for addressing and expansion. Addresses span from 00 to 10, enabling orderly addressing across the linked racks. This extension rack integrates into the Modicon Premium family, supporting modular expansion while preserving backplane signaling and communication continuity across racks, which is essential for large automation projects where space and wiring efficiency are critical. When used, it allows customers to grow their control system without replacing existing racks, enabling more I/O points and devices to be managed from a single TSX environment.