Allen Bradley 1756-DNB DeviceNet Communication Module 1756DNB

Description:

The Allen Bradley 1756‑DNB DeviceNet communication module is used in industrial automation systems to provide DeviceNet networking capability for ControlLogix PLC racks. Commonly installed in ControlLogix chassis to enable communication with DeviceNet I/O, sensors, and actuators. Maintenance teams and system integrators use this module for network integration, system expansion, and replacement of legacy communication interfaces.

Applications:

The Allen Bradley 1756‑DNB module is widely used in automation networks where DeviceNet protocol is required for industrial device communication. It is commonly found in packaging machinery, material handling systems, assembly lines, and plant automation systems where distributed DeviceNet I/O, motor drives, and field devices need reliable, real‑time communication with a central PLC controller.

Technical Specifications:

• Model: 1756‑DNB
• Function: DeviceNet communication interface for ControlLogix PLCs
• Supported protocol: DeviceNet (CIP)
• Connector type: 5‑pin DeviceNet port
• Baud rates supported: 125 kbps, 250 kbps, 500 kbps
• Indicators: Status LEDs for network and node status
• Mounting: 1756 ControlLogix chassis slot
• Compatibility: Allen Bradley ControlLogix PLC family
• Communication functions: I/O scanning, messaging, and DeviceNet networking
• Power: Backplane supplied
• Designed for: Industrial DeviceNet networking and I/O communication

Common Replacements:

• Allen Bradley 1756‑DNB/E (enhanced variant)
• Allen Bradley 1756‑EN2T (EtherNet/IP communication)
• CompactLogix DeviceNet adapter module