Schneider Electric 490NAE91100 Circuit Breaker

Schneider Electric 490NAE91100 is a main bus junction box built for Profibus DP networks within Modicon Quantum automation environments. It functions as the central distribution point on the Profibus DP bus, linking the controller’s main bus to DP nodes and field devices across the network. The part number 490NAE91100 is listed in Schneider Electric’s Modicon catalog as a Profibus DP junction accessory, with product availability shown as Non-Stock and not normally stocked at distribution facilities; Schneider also notes a planned discontinuation date of December 31, 2026, after which sales are limited to service and repair while spare parts remain available. In industrial automation applications that rely on Profibus DP communication, this junction box helps organize and route bus connections within a Quantum-based control system, providing a dedicated hardware interface that supports reliable communication on the DP network.