Schneider Electric 990NAA26320 Connection Cordset

The Schneider Electric 990NAA26320, also cataloged as the 990NAA26320 Connection Cordset, operates as a dedicated hardware component for RS232 PC terminal communication with Unity processor interfaces within Modicon Quantum and Modicon Premium system architectures. Configured for serial data exchange between PC terminal and processor-side SUB-D 9 interfaces in Modicon automation platforms, the Schneider Electric 990NAA26320 (990NAA26320 Connection Cordset) provides direct physical/electrical execution of point-to-point communication over a 3.7 m shielded cable assembly.

Suffix Breakdown & Model Matrix

No explicit suffix segmentation is defined for this part number. The designation 990NAA26320 is treated as a single-order identifier without documented functional subfields.

Hardware Specifications

Modicon Serial Communication Interface Characteristics

The assembly implements RS232-level serial signaling through dual SUB-D 9 connectors, maintaining single-ended voltage referencing for PC terminal linkage to Unity processor communication ports. In Modicon Quantum and Modicon Premium environments, signal integrity is dependent on controlled impedance routing and shield continuity across the full 3.7 m conductor length.

Firmware interoperability constraints in Schneider Electric PLC architectures are aligned with firmware flash compatibility, where cable-level connectivity must remain consistent across supported CPU revisions to ensure stable terminal session establishment and download procedures.

Frequently Asked Questions

Q: Does the 990NAA26320 support hot-swap during active RS232 communication? A: No. RS232 point-to-point links require physical disconnection before insertion or removal to avoid transient voltage disruption on SUB-D 9 signal lines.

Q: What is the shielding requirement for this cordset? A: The cable shield must be terminated to chassis ground at one end only to reduce ground loop current in RS232 single-ended communication topology.

Q: Can this cordset be used with non-Unity processors? A: Electrical compatibility depends on SUB-D 9 RS232 pin mapping; unsupported CPU firmware or pinout differences may prevent valid terminal synchronization.

Field Installation Guidelines

Ensure both SUB-D 9 connectors are fully seated with mechanical retention screws engaged to standard torque for D-sub interfaces. Route the cable away from high-voltage switching conductors and inverter output lines to reduce induced noise coupling. Maintain shield continuity and avoid multiple grounding points along the cable path. Do not exceed standard RS232 cable routing practices for bend radius or mechanical strain at connector joints.