Allen-Bradley 1756-DNB ControlLogix DeviceNet Scanner Module

The 1756-DNB is a ControlLogix DeviceNet scanner module that acts as an interface between the ControlLogix system backplane and devices on a DeviceNet network. The 1756-DNB communicates with DeviceNet devices to read input data, write output data, and manage configuration parameters via predefined ControlLogix controller I/O and status structures. It features a front-panel 4-character alphanumeric display and status indicators for system diagnostics, rotary switches for data rate and node address settings, a USB 1.1 device port for programming and configuration, and an open-style DeviceNet interface connector.

Features

• Fits into any slot of a ControlLogix chassis with support for multiple scanner modules in the same chassis.
• Features an onboard 4-character alphanumeric display for diagnostics, error code reporting, and node monitoring.
• Equipped with front/top-accessible rotary switches to set network communication rate and DeviceNet node address.
• Integrated USB 1.1 Series B device port for direct PC programming, configuration, and firmware updates.
• Supports up to 123 words of output data, 124 words of input data, and status data registers across the backplane.
• Includes MOD/NET, I/O, and OK bi-color status indicators for network, I/O scanning, and module status.

Applications

• DeviceNet network control and monitoring in ControlLogix PLC systems.
• Interfacing field sensors, actuators, motor starters, and drives to ControlLogix controllers.
• Industrial automation networks requiring distributed device data acquisition and control.

Technical Specifications

Connections/Interfaces

Installation Guidelines

• Align the circuit board with the top and bottom guides in the ControlLogix chassis and slide the module into the slot until it is flush with other modules.
• Mount inside an enclosure that provides appropriate environmental protection and requires a tool for interior access.
• Wire the DeviceNet open-style linear plug matching the color-coded terminals (Red: V+, White: CAN_H, Bare: Shield, Blue: CAN_L, Black: V-).
• Ensure proper DeviceNet network power supply compliance (SELV/PELV for CE LVD; Class 2 or Limited Voltage/Current for UL).
• Avoid setting or changing the rotary switch communication rate while connected to an active network.
• Use a maximum 3.0 m USB cable without hubs for temporary programming or configuration connections.

Compliance and Certifications

• UL Listed Industrial Control Equipment (UL File E65584)
• UL Listed for Class I, Division 2 Group A, B, C, D Hazardous Locations (UL File E194810)
• CSA Certified Process Control Equipment (CSA File LR54689C)
• CSA Certified Process Control Equipment for Class I, Division 2 Group A, B, C, D Hazardous Locations (CSA File LR69960C)
• FM Approved Equipment for Class I, Division 2 Group A, B, C, D Hazardous Locations
• European Union ATEX Directive 94/9/EC compliant (EN 60079-15, Zone 2 Protection "n")
• European Union EMC Directive 2004/108/EC compliant (EN 61326-1, EN 61000-6-2, EN 61000-6-4, EN 61131-2)
• Australian Radiocommunications Act compliant (AS/NZS CISPR 11)
• ODVA conformance tested to DeviceNet specifications