Schneider Electric 140NOM21100 Programmable Logic Controller Module

Schneider Electric 140NOM21100 is a DIO head-end adaptor for the Modicon Quantum programmable logic controller platform, providing a Modbus Plus connection to extend digital input/output across a dedicated network. As a Network Option Module (NOM), it sits on the Quantum backplane and communicates over a single twisted-pair RS-485 link to remote I/O, enabling Modbus Plus‑style data exchange for discrete automation tasks. Schneider’s product catalog identifies the 140NOM21100 explicitly as the Modbus Plus head-end interface, and the module has been marked discontinued with an end-of-commercialization date of April 14, 2023; when replacement is needed, Schneider directs customers toward the Modicon M580 family via the BMENOC0301 Ethernet communication module. The NOM is part of the Modicon Quantum ecosystem, designed for high-reliability industrial control applications requiring robust field-network I/O integration.