
Allen-Bradley 1784-U2CN USB to ControlNet Cable Interface
Product Summary
The 1784-U2CN cable from Allen-Bradley bridges a computer’s USB port directly to a ControlNet network. This interface lets operators program and monitor industrial automation units with ease. It operates at 5.25 Volts DC and draws 225 milliamps of current. The cable meets CE, cULus, RCM, KCC, and CI standards for global compliance.
Expert Technical Evaluation & Performance Review
The 1784-U2CN cable delivers a reliable connection for ControlNet networks in industrial settings. It uses a 5.25 Volts DC supply and draws 225 milliamps of current. This low power consumption makes it ideal for laptops in the field. The isolation voltage sits at 30 Volts continuous with basic insulation. This design protects the host computer from network transients. The ControlNet current reaches 70 milliamps at 24 Volts. This ensures stable communication with network nodes.

The cable operates within a temperature range of 0 to 55 degrees Celsius. Engineers can deploy it at altitudes up to 2000 meters without derating. The IP 30 enclosure rating protects against tools and wires. It does not offer water resistance, so keep it dry. A node address switch sits in the center of the cable assembly. This switch lets you change the network address quickly. Three LED indicators show USB status, module status, and network status. The USB LED glows green when configured with no traffic. It blinks green during active network communication. This visual feedback speeds up troubleshooting during setup.
The cable is sensitive to electrostatic discharge. Always ground yourself before handling the connectors. ESD can damage internal components permanently. The cable uses a standard USB Type-A connector on one end. The other end connects to a ControlNet tap or network port. This simple design reduces installation errors. The 225 milliamps current rating ensures compatibility with standard USB ports. The 5.25 Volts DC supply matches typical USB voltage levels. This eliminates the need for an external power supply.
Step-by-Step Installation Guide

Start by powering down your laptop and the ControlNet network. Connect the USB end of the 1784-U2CN cable to your computer. Connect the ControlNet end to the network tap or node. Power on your laptop and let it detect the new hardware. Set the node address using the center switch before powering the network. Check the USB LED for a solid green light. This confirms the cable is configured correctly. Look for a blinking green USB LED during active data traffic. Verify the module and network LEDs show proper status. Follow all ESD precautions during the entire process. This approach ensures a safe and reliable connection every time.
Logistics & Standard Packaging Details
- One Allen-Bradley 1784-U2CN USB to ControlNet cable assembly
- One node address switch with integrated LED indicators
- Standard anti-static packaging for ESD protection
- Quick-start guide with basic installation steps
- Express shipping available via FedEx, UPS, and DHL
