Schneider Electric Modicon 990NAD21930 Drop Cable

The Schneider Electric 990NAD21930 is a dedicated drop cable for industrial networks. This cable creates reliable connections within Modicon automation systems. It supports seamless communication between devices on a Modbus Plus network. The 990NAD21930 offers a practical 6-meter length for flexible cabinet layout.

Core Product Specifications

• Brand & Manufacturer: Schneider Electric
• Model Number: 990NAD21930
• Product Line: Modicon Connection Accessories
• Product Type: Modbus Plus Drop Cable
• Primary Use: Connecting Junction Box to Communication Module
• Cable Length: 6 meters / 19.7 feet
• Connector (Module Side): 1 x SUB-D 9-pin, Straight
• Connection (Junction Box Side): Flying Leads for Termination
• Cable Positioning: Right Side of Device Mounting
• Unit Net Weight: 0.465 kg / 1.025 lbs
• Shipping Weight: 0.91 kg / 2.00 lbs

Environmental & Operational Ratings

• Operating Temperature Range: 0°C to +40°C (32°F to 104°F)
• Operating Humidity Range: Up to 80% (Non-Condensing)
• Storage Humidity Range: Up to 80% (Non-Condensing)
• Maximum Operating Altitude: 1000 meters (3280 feet) without performance loss
• Insulation Resistance: >100 MΩ (at 500V DC typical)
• Conductor Gauge: Standard signal wiring for data communication

Compatible Systems & Platforms

• Primary Compatible Module: Schneider Electric 990NAD23000
• Automation Platform: Modicon Momentum
• Drive Compatibility: Altivar 71 and Altivar 61 Series
• Network Compatibility: Designed for Modbus Plus (MB+) Networks
• Application: Factory Automation, Process Control, Drive Integration

Installation Guide & Connection Details

• Connect the SUB-D 9-pin connector to the communication module port.
• The connector has a straight pin configuration for direct mating.
• Route the 6-meter cable to your junction box location carefully.
• Terminate the flying leads on the junction box side according to your wiring diagram.
• Secure the cable along its path to avoid strain on the connectors.
• Ensure the operating environment stays within the specified temperature limits.

Packaging & Shipping Information

• Package Includes: 1 x Schneider Electric 990NAD21930 Drop Cable
• Packaging: Protective retail box or polybag
• Global Trade Item Number (GTIN): 3595861136410
• Shipping Methods Available: FedEx, UPS, DHL Express services
• Delivery Time: Varies by destination and service selection
• Return Policy: This specific accessory is non-returnable

Warranty & Support

• Warranty Period: 12 months from the date of purchase
• The warranty covers defects in materials and workmanship.
• Proper installation within specified environmental conditions is required.
• Contact the seller for warranty claims and technical support.

Frequently Asked Questions (FAQ)

• What is the main purpose of the 990NAD21930 cable?

This cable establishes a physical Modbus Plus network link between a communication module (like the 990NAD23000) and a remote junction box, allowing for device expansion.

• Can I use this cable with other Schneider PLCs besides Momentum?

While designed for Momentum, it often works with any Schneider device featuring a compatible SUB-D 9-pin Modbus Plus port. Always verify your specific module's manual first.

• Why are there flying leads on one end instead of two connectors?

The flying leads provide flexibility for termination inside a junction box. You can connect them directly to terminal blocks, which is more secure and customizable for panel building than a fixed connector.

• Is the 6-meter length sufficient for most control panel setups?

In our experience, 6 meters is a very common and practical length. It typically allows routing from a central PLC rack to a nearby junction box or cabinet door device without excessive slack.

• What happens if I operate it above 40°C or 1000 meters altitude?

Exceeding these limits may reduce the cable's insulation performance and long-term reliability. For hotter environments or higher altitudes, consult Schneider for industrial-grade alternatives with higher ratings.

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