Ensure Network Integrity: Schneider Electric 990NAD21110 Drop Cable

Technical Specifications

Main Features and Advantages

The Schneider Electric 990NAD21110​ delivers key advantages through its optimized design for industrial networking. Superior noise immunity is its foremost feature. The cable utilizes a combination of twisted pair construction and a comprehensive foil-plus-braid shield. The twisting of the data pair minimizes magnetic field interference (crosstalk), while the multi-layer shield effectively blocks electromagnetic interference (EMI) and radio frequency interference (RFI) from motors, drives, and other equipment, ensuring clean signal transmission essential for Modbus Plus’s reliable peer-to-peer messaging.Factory-assembled reliability is a major benefit. Each 990NAD21110​ is precision-assembled and tested at the factory. This guarantees correct pin-to-pin wiring, proper shield termination to the D-Sub connector shells, and consistent electrical performance. This eliminates the common field wiring issues of improper shielding, cold solder joints, or miswired pins that can cause intermittent network faults, which are notoriously difficult to diagnose. The result is a drastic reduction in network installation time and a significant increase in first-time-commissioning success. Mechanical durability is ensured through the use of industrial-grade components. The connectors feature robust metal shells that provide strain relief and secure mating, while the cable jacket is designed to resist abrasion, oils, and chemicals commonly found in plant environments. The defined length (typically 1 meter) helps maintain a neat and organized panel layout, avoiding excessive cable slack that can collect dust or pose a snag hazard. Using the genuine Schneider Electric 990NAD21110​ ensures full compatibility and performance, safeguarding the integrity of the entire Modbus Plus network segment.

Application Field

The Schneider Electric 990NAD21110​ is applied wherever Schneider Electric’s Modbus Plus network is deployed for industrial automation and control. This is prevalent in manufacturing industries such as automotive, where it connects Quantum PLCs controlling assembly lines, robots, and welding stations to a supervisory network. In material handling and packaging, the 990NAD21110​ links PLCs managing conveyors, sorters, and palletizers, enabling coordinated control and data exchange across the system. Its robustness makes it ideal for these dynamic factory floor environments with high levels of electrical noise.Within process industries like water/wastewater treatment and chemical processing, the cable is used to connect controllers overseeing pumping stations, valve actuation, and filtration processes to the central SCADA system, providing reliable data transmission even in corrosive or humid atmospheres. In discrete manufacturing, such as for machinery OEMs, the 990NAD21110​ is the standard cable for networking the machine’s main controller with remote I/O drops, motor drives, and HMIs inside the control cabinet. Its primary application scenario is as the final connection from a Modbus Plus “trunk” or “tap” (a connection point on the main cable) to the communication port of any node device. This includes connecting to Quantum series CPU modules, Momentum distributed I/O heads, BM85 network interface bridges, and specialized communication processors. Whether for new installations, network expansions, or as a critical spare for maintenance, the Schneider Electric 990NAD21110​ is the trusted physical link that ensures the deterministic and reliable data exchange that Modbus Plus networks are known for.