Allen-Bradley 1756-DNB ControlLogix DeviceNet Scanner

Allen-Bradley 1756-DNB ControlLogix DeviceNet Scanner Module

Availability: 10 left in stock

The Allen-Bradley 1756-DNB is a specialized communication interface module designed for the ControlLogix platform, functioning as a bridge and scanner...

SKU: 1756-DNB

Manufacturer: Allen-Bradley
Product No.: 1756-DNB
Product Type: Communication Module
Product Origin: USA
Payment:T/T, Western Union
Weight: 250g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

The Allen-Bradley 1756-DNB is a specialized communication interface module designed for the ControlLogix platform, functioning as a bridge and scanner for DeviceNet network architectures. It enables seamless data exchange and control between a ControlLogix processor and a wide array of distributed field devices, including actuators, motor starters, sensors, and variable frequency drives.

Features

Serves as a high-performance DeviceNet scanner for ControlLogix chassis integration.
Supports a network capacity of up to 64 nodes with configurable addresses from 00 to 63.
Provides selectable communication baud rates of 125 Kbps, 250 Kbps, and 500 Kbps.
Integrated diagnostic capabilities for real-time network health and status monitoring.
Backplane-powered design simplifies integration within standard ControlLogix rack systems.
Supports Automatic Device Replacement (ADR) functionality for streamlined maintenance.

Applications

Automotive Manufacturing: Integration of weld cells, assembly sensors, and conveyor logic.
Oil and Gas: Communication with remote valve manifolds, field instruments, and telemetry systems.
Water and Wastewater: Interfacing with flow meters, pump controllers, and remote processing instrumentation.
Logistics: Management of sortation systems, AGV routing, and industrial conveyor networks.

Technical Specifications

Model	1756-DNB
Series	ControlLogix
Backplane Current (5.1V)	350 mA
Backplane Current (24V)	210 mA
Max Power Dissipation	5.8 Watts
Thermal Dissipation	19.8 BTU/hr
Isolation Voltage	30V
Max Node Capacity	64

Installation Guidelines

Handling: This is an electrostatic-sensitive device. Ensure proper ESD grounding procedures are followed when handling the module.
Insertion: Always power down the ControlLogix chassis before inserting or removing the module to prevent electrical arcing on the backplane.
Wiring: The DeviceNet trunk line requires two 121-ohm termination resistors at the extreme ends of the network.
Grounding: To prevent ground loops, the network shield should be connected to earth ground at only one physical point, typically at the DeviceNet power supply.
Hot-Swapping: While the ControlLogix backplane supports hot-swapping, the DeviceNet plug must be disconnected before removing the module to avoid injecting voltage transients into the network.

FAQ

What is the primary function of the 1756-DNB?

The 1756-DNB acts as a scanner and bridge, allowing a ControlLogix controller to manage I/O and parameters from DeviceNet-compatible field devices across a plant-floor network.

Can this module operate in a remote chassis?

Yes, the module can reside in a remote ControlLogix rack without a local controller, provided a bridging module (such as an EtherNet/IP or ControlNet module) is present to facilitate communication with the master controller.

How is the baud rate configured?

The module supports Autobaud detection, or it can be manually configured via the front-panel interface or through the RSNetWorx for DeviceNet software configuration utility.

What's clients say about us

Excellent Emergency Support!

Our production line was down due to a faulty Bently Nevada monitor. We found it in stock here and they shipped it via DHL immediately. Back in operation within 48 hours—truly a lifesaver for our plant.

Mark Thompson

Maintenance Manager, USA

Reliable Source for New Spares

Finding brand new, original modules is critical for our safety. This team delivers factory-fresh components with full certification. Their commitment to only selling new products makes them our most trusted partner.

Robert Hoffmann

Engineering Lead, Germany

Top-tier Service and Quality

We have sourced Honeywell and Schneider parts here for two years. Every shipment arrives well-packaged with original factory seals intact. Clear communication and the best lead times in the industry.