1788-DNBO | Allen-Bradley DeviceNet Daughtercard for FlexLogix and DriveLogix Systems

The 1788-DNBO is a DeviceNet daughtercard used to enable DeviceNet communication capabilities on compatible host devices. It integrates the host with a DeviceNet network, allowing it to exchange I/O data and status information with other network devices. It acts as a communication bridge between the DeviceNet protocol and the host’s control logic. This module is typically used in systems that require reliable field-level communication in automation architectures. Its compact form makes it ideal for embedded integration.

The node address of the 1788-DNBO is set using two rotary switches located on the card. Acceptable addresses range from 0 to 63, which is standard for DeviceNet nodes. Setting the switches to 99 and rebooting erases the scanlist configuration. The address is only read during power-up, so changes require a power cycle to take effect. A unique node address is required for each DeviceNet device on the network to avoid conflicts.

Yes, the module includes several LED indicators: Network Status (NS), Module Status (MS), and I/O Status. These LEDs are bi-color and help indicate the state of communication, configuration, and scanning. For example, a green light typically means normal operation, while red or flashing indicates faults or communication errors. This visual feedback assists technicians during troubleshooting and commissioning. It enhances usability by providing quick system diagnostics.

The 1788-DNBO module supports the DeviceNet protocol, which is a widely used fieldbus standard for industrial communication. It allows for real-time I/O messaging and status monitoring across the network. Communication parameters, such as scanlists and device addresses, are configured via RSNetWorx for DeviceNet. The module also supports cyclic and polled I/O data transfer formats. Its compatibility with standard DeviceNet specifications ensures interoperability with Rockwell and third-party devices.

No, the 1788-DNBO was officially discontinued by Rockwell Automation on December 31, 2016. It is no longer available for sale, and Rockwell has not planned any direct RA replacement for this module. Users are encouraged to remove it from their active BOMs and system designs. While some third-party suppliers may still offer surplus stock, long-term support or firmware updates are no longer provided. If you're designing a new system or planning upgrades, consider migrating to newer communication platforms such as EtherNet/IP with supported alternatives.