Allen-Bradley 1756-DNB DeviceNet Communication Module

Allen-Bradley 1756-DNB DeviceNet Communication Module provides DeviceNet networking capability for ControlLogix PLC racks, enabling communication with DeviceNet I/O, sensors, and actuators. It functions as the DeviceNet interface for ControlLogix, supports the DeviceNet (CIP) protocol over a 5-pin DeviceNet port, and mounts in a 1756 ControlLogix chassis slot with backplane power. Baud rates supported are 125 kbps, 250 kbps, and 500 kbps, and the module handles I/O scanning, messaging, and overall DeviceNet networking. Status LEDs indicate network and node status for quick health checks. Common applications include packaging machinery, material handling systems, assembly lines, and plant automation where distributed DeviceNet I/O, motor drives, and field devices require reliable, real-time PLC communication with the central controller. The module is compatible with the Allen-Bradley ControlLogix PLC family, and common replacements include 1756-DNB/E and 1756-EN2T, as well as related DeviceNet adapters for CompactLogix when integrating legacy DeviceNet networks. This combination supports scalable DeviceNet network integrations in industrial environments.