Product Overview: The Schneider 990NAD21930 Modbus Plus Drop Cable
The Schneider 990NAD21930 is a specialized Modbus Plus drop cable designed for the Modicon series of programmable controllers. This cable provides a reliable connection between a communication module and a junction box, ensuring seamless data transmission in industrial automation networks. With a cable length of 6 meters, it offers flexibility in installation while maintaining signal integrity. Upgrade your existing generic cabling with this genuine Schneider component to enhance network reliability and reduce downtime.
Technical Specifications of the 990NAD21930
| Parameter |
Value |
| Manufacturer |
Schneider Electric |
| Product Line |
Modicon |
| Part Number |
990NAD21930 |
| EAN |
3595861136410 |
| Weight |
2.00 lbs (0.91 kg) |
| Product Type |
Drop Cable |
| Cable Length |
6 m (19.7 ft) |
| Electrical Connection |
1 connector SUB-D 9 straight (communication module side); Flying leads (junction box side) |
| Location on Device |
Right side |
| Ambient Temperature Range |
0 to 40 °C |
| Operating Humidity Range |
80% (non-condensing) |
| Storage Humidity Range |
80% (non-condensing) |
| Maximum Operating Altitude |
1000 m above sea level without derating |
| Use |
Connecting Junction Box |
| Accessory Category |
Connection accessories |
| Accessory Type |
Drop connection cable |
| Accessory Designation |
Modbus Plus drop cable |
| Accessory Destination |
Modbus Plus network |
Real-World Applications for the Schneider 990NAD21930
The Schneider 990NAD21930 drop cable is essential for connecting remote junction boxes to Modbus Plus networks in manufacturing plants, processing facilities, and material handling systems. For example, in a packaging line using Altivar 71 drives, this cable enables reliable communication between the drive and the control system. Similarly, in a Modicon Momentum automation platform, it facilitates quick and secure connections for distributed I/O modules. Using this genuine Schneider cable as a replacement for older or non-standard cables ensures consistent performance and reduces signal errors.
Installation Guide for the 990NAD21930 Drop Cable
To install the Schneider 990NAD21930, first ensure the power is off to avoid electrical hazards. Connect the SUB-D 9 connector to the communication module's right-side port. Then, connect the flying leads to the appropriate terminals in the junction box according to the wiring diagram. Secure the cable to prevent strain and ensure it is within the ambient temperature range of 0 to 40 °C. The lightweight design (0.46 kg) facilitates easy routing and reduces mechanical stress on connectors. For optimal reliability, avoid bending the cable beyond its recommended radius.
Compatibility and Integration Details
The 990NAD21930 drop cable is specifically designed for Modbus Plus networks and is compatible with the Modicon Momentum automation platform, Altivar 71, and Altivar 61 variable speed drives. It also works with the 990NAD23000 accessory. This cable ensures seamless integration into existing Schneider Electric control systems, making it an ideal upgrade or replacement component for maintaining network integrity.
Selection Guide and Purchasing Advice
When selecting a drop cable for your Modbus Plus network, verify that the cable length (6 m) meets your installation requirements. The Schneider 990NAD21930 is a genuine replacement part that guarantees performance and compatibility. For reliable sourcing and competitive pricing, consult PLC Source PRO (formerly ubest101), a trusted supplier of industrial automation spares. Always confirm the connector type (SUB-D 9) and the presence of flying leads to ensure a proper fit for your junction box setup.