1788-DNBO | Allen-Bradley DeviceNet Daughtercard Module

The 1788-DNBO is an Allen-Bradley DeviceNet daughtercard module designed to provide a direct DeviceNet network connection for compatible Logix controllers or communication interfaces. Featuring an open connector format with front-accessible I/O connection, it enables low-level field device integration across standard 24 VDC industrial communications networks without requiring additional rack-mounted communication modules.

Network Communication & Interface

This module integrates a standard open-style DeviceNet connector on its front panel, allowing simplified drop-line or trunk line wiring. It facilitates real-time data exchange between the host controller and DeviceNet-compliant field devices such as sensors, actuators, and motor starters. The front panel interface streamlines diagnostic and signal monitoring during routine system operations.

Power & Operating Parameters

The card operates over a wide input supply range of 5 to 24 VDC with an operational current draw between 20 mA and 260 mA depending on network bus loading and active signal processing. Its low-power design ensures minimal thermal impact on the host assembly while maintaining stable communication signal integrity across standard industrial noise environments.

Technical Specifications

Installation & Wiring Considerations

Ensure power to the primary host device is completely isolated before inserting or removing the daughtercard. Signal wiring connected to the front open-style connector must follow standard DeviceNet bus topology guidelines, including appropriate end-of-line termination resistors (121 Ohm) on the main trunk cable to prevent signal reflections.

Frequently Asked Questions

Q: What type of network connector does the 1788-DNBO use for DeviceNet connections? A: The module utilizes a front-mounted open-style terminal block connector designed for direct DeviceNet network cable wiring.

Q: What are the input voltage and current requirements for the 1788-DNBO? A: It operates on a supply voltage of 5 to 24 VDC and consumes between 20 mA and 260 mA depending on network activity and bus load.