Product Summary
The Allen-Bradley 1784-U2DN cable offers a direct USB connection to DeviceNet networks. Engineers use this 0.61-meter interface for programming and monitoring. It draws power from the USB port and supports multiple data rates for flexible industrial communication.
Theme A: Product Procurement & Buyer Guide
Why Choose the 1784-U2DN for DeviceNet Access?
Procurement managers need reliable tools for legacy system maintenance. The 1784-U2DN solves the challenge of connecting modern laptops to older DeviceNet networks. This module eliminates the need for bulky PCMCIA cards or internal PCI slots. It provides a simple USB connection that any technician can use immediately.
Core Technical Specifications for Decision Makers
The 1784-U2DN operates at three selectable data rates. You can set communication speed to 125, 250, or 500 kbps. This flexibility ensures compatibility with various DeviceNet configurations. The module automatically detects the active network rate. If detection fails, it defaults to 125 kbps as a safe fallback option.
Power and Connectivity Requirements
This interface draws only 0.5 Watts of power from the USB host. It requires a 5 Volts DC supply at 75 milliamps from the USB port. The DeviceNet side needs a separate 24 Volts DC supply at 75 milliamps. These low power demands make it ideal for field troubleshooting.
Environmental Ratings and Certifications
The 1784-U2DN carries certifications for C-Tick, CE, KC, and UL standards. Its enclosure meets IP 20 protection rating for indoor use. The operating temperature must stay below 55 degrees Celsius. This module is not water resistant and requires a clean environment.
Node Addressing and Physical Setup
A rotary switch on the side selects the node address. This feature allows quick network configuration without software tools. The module includes a mounting unit for secure installation. The connector is an open style male 5-pin Phoenix type.
Theme F: Deep-Dive Technical FAQ
How do I install the 1784-U2DN driver?
You must install the cable driver on your computer first. The driver enables the operating system to recognize the module. After installation, plug the USB cable into an available port. The blue and red LED indicators will show module status.
What do the LED indicators mean on the 1784-U2DN?
The module has a combined blue and red LED. It shows network activity, module status, and self-test results. A blue light typically indicates normal operation. A red light signals a fault or standby mode condition.
Can I use this cable in a wet environment?
No, you should not use the 1784-U2DN in wet conditions. The enclosure meets only IP 20 protection rating. This rating offers protection against solid objects larger than 12mm. It provides no protection against water or moisture ingress.
What happens if the data rate is not detected?
The 1784-U2DN will automatically fall back to 125 kbps. This default rate ensures basic communication can still occur. You can manually override this using the data rate switch. Set the switch to match your network's operating speed.
What is the maximum cable length for this module?
The 1784-U2DN cable itself is exactly 0.61 meters long. This short length is standard for USB interface cables. It keeps signal integrity high between the computer and module. The DeviceNet trunk cable can extend much further.
Logistics & Standard Packaging Details
- One Allen-Bradley 1784-U2DN USB to DeviceNet cable assembly
- One open style male 5-pin Phoenix connector pre-installed
- Product documentation and installation guide included
- Weighs approximately 0.23 lbs for easy shipping
- Express delivery shipping available via FedEx, UPS, and DHL
