Technical Specifications Breakdown
Key parameters for the 990NAD21930 are listed below for quick reference:
| Feature | Specification |
|---|---|
| Manufacturer | Schneider Electric |
| Product Line | Modicon |
| Part Number | 990NAD21930 |
| Product Type | Drop Cable |
| Cable Length | 6 m (19.7 ft) |
| Electrical Connection (Module Side) | 1 connector SUB-D 9 straight |
| Electrical Connection (Junction Box Side) | Flying leads |
| Localisation on Device | Right Side |
| Ambient Temperature Range | 0 to 40 degrees Celsius |
| Operating Humidity Range | 80% (non-condensing) |
| Maximum Operating Altitude | 1000 meters above sea level without derating |
| Net Weight | 0.465 kg (1.025 lb) |
Industry Applications
The 6-meter length provides flexibility for routing within cabinets or between nearby equipment, reducing strain on connectors. Engineers appreciate the pre-wired SUB-D 9 connector, which eliminates field termination errors and speeds up commissioning.

Installation & Setup Guidance
Mount the cable on the right side of the communication module as specified. Ensure the SUB-D 9 connector is fully seated and locked. Route the flying leads to the junction box terminals, observing polarity and signal assignments per the system wiring diagram. Avoid sharp bends and keep the cable away from high-voltage power cables to prevent electromagnetic interference. Verify continuity after installation.
Maintenance & Reliability
The cable operates reliably in ambient temperatures from 0 to 40 degrees Celsius and up to 80% non-condensing humidity. Periodically inspect the connectors for corrosion or looseness, especially in humid environments. The cable is rated for altitudes up to 1000 meters without derating, making it suitable for most industrial sites. No special maintenance is required beyond routine visual checks.
Reliable Connectivity for Modicon Networks
When integrating automation components, a dependable drop cable ensures signal integrity and reduces installation time. The Schneider Electric 990NAD21930 is a specialized drop cable designed for Modicon series applications, providing a robust connection between a communication module and a junction box. This 6-meter cable simplifies wiring in control panels and machinery, making it a practical choice for system integrators and maintenance teams.

Compatibility & Integration
This accessory is designed for Modbus Plus networks and is compatible with the 990NAD23000 cable. It works with Modicon Momentum automation platforms, Altivar 71, and Altivar 61 drives. The SUB-D 9 connector ensures a standard interface, while flying leads simplify junction box terminations. Always verify system compatibility before ordering.
Selection Guide & Purchasing Advice
When selecting a drop cable, consider the distance between the module and junction box. The 6-meter length of the 990NAD21930 covers most cabinet installations. For longer runs, consult the network topology guidelines. Please verify current lifecycle status and availability with AutoDCSTech before ordering.
Availability & Condition at AutoDCSTech
| Part Number | 990NAD21930 |
|---|---|
| Availability | In Stock |
| Condition | New |
| Warranty | One Year |
| Origin | France |
