1756-DNB | Allen-Bradley ControlLogix DeviceNet Bridge/Scanner Module
1756-DNB | Allen-Bradley ControlLogix DeviceNet Bridge/Scanner Module
1756-DNB | Allen-Bradley ControlLogix DeviceNet Bridge/Scanner Module
1756-DNB | Allen-Bradley ControlLogix DeviceNet Bridge/Scanner Module
1756-DNB | Allen-Bradley ControlLogix DeviceNet Bridge/Scanner Module
1756-DNB | Allen-Bradley ControlLogix DeviceNet Bridge/Scanner Module
    1756-DNB | Allen-Bradley ControlLogix DeviceNet Bridge/Scanner Module
    1756-DNB | Allen-Bradley ControlLogix DeviceNet Bridge/Scanner Module
1756-DNB | Allen-Bradley ControlLogix DeviceNet Bridge/Scanner Module
1756-DNB | Allen-Bradley ControlLogix DeviceNet Bridge/Scanner Module

1756-DNB | Allen-Bradley ControlLogix DeviceNet Bridge/Scanner Module

Part #: 1756-DNB Manufactured by: Allen-Bradley
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$319.00
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$319.00
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Product Overview
Allen Bradley 1756-DNB ControlLogix DeviceNet Bridge/Scanner Module. Communication Rates: 125 Kbps (500 m max), 250 Kbps (...  Read more
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Product Description P/N: 1756-DNB

Description / Specifications

Description 

Allen Bradley ControlLogix Scanner Module with 125, 250, or 500 kilobites per second DeviceNet Communication Rates.

 

Technical Specifications 

 

Brand Allen-Bradley
Series ControlLogix
Part Number 1756-DNB
Manufacturer Rockwell Automation
Module Type Scanner Module
DeviceNet Communication Rates 125, 250, or 500 kilobites per second
Location ControlLogix Chassis (any slot)
Backplane Current (5Volts) 580 milliamps
Backplane Current (24Volts) 3 milliamps
Power Dissipation (Max) 5.8 Watts
Thermal Dissipation 19.8 BTU per hour
DeviceNet Current 11-25 Volts DC
Insulation Voltage 30 Volts Continuous
Operating Temperature 0-60 Celsius (32-140 Fahrenheit)

  

 

Information About 1756-DNB

The Allen-Bradley 1756-DNB is a DeviceNet Scanner module that connects to a ControlLogix system. It serves as a bridge that collects data from the DeviceNet modules and then delivers a copy of the information to the controller and vice versa. Using the 1756-DNB scanner module, the user can expect DeviceNet communication rates of 125 kilobytes per second by default, 250 kilobytes per second, and up to 500 kilobytes per second. It has DeviceNet node addresses 00 to 63, with node address 63 set by default and a maximum of 64 nodes. It is only compatible with the Logix5550 controller. This particular module acts as a gateway between DeviceNet devices and the network in order to read input and write output from a device, download the configuration data, and monitor the operational status of a device.

The Allen-Bradley 1756-DNB will communicate in the form of Diagnostic Tables, Inputs, and Outputs when the controller is involved. The I/O’s exchange configuration data, status information, and the I/O data of the device. The module communicates using strobe, poll, change of state, and/or cyclic messages with another device. These messages are used to gather from or deliver data to every device. The data received from a device will then be organized and made available to the controller (input data) and the data received from the controller will be sent to the device (output data). The 1756-DNB's current draw at 5.1 Volts DC is 400 milliamps while it stays at 0 milliamps when the current draw is at 24 Volts DC. The power dissipation of this module is around 3.5 Watts and its thermal dissipation is at 11.9 BTU/hour. This module can be installed in any available chassis slot and is used together with the RSNetWorx.

.


Manufacturer information

Allen-Bradley, a brand of Rockwell Automation, specializes in manufacturing industrial automation equipment. The product range includes programmable logic controllers (PLCs), motion control systems, safety devices, motor control equipment, automation software, and HMI panels. Allen-Bradley products are known for their reliability and integration with other systems.

Frequently Asked Questions about 1756-DNB
Question: What is the 1756-DNB?
Date Update:30/05/2025
Answer:

The 1756-DNB is an Allen-Bradley DeviceNet Communication Interface Module designed to connect ControlLogix controllers to a DeviceNet network. This module allows ControlLogix systems to communicate with DeviceNet devices such as sensors, actuators, drives, and remote I/O. It supports DeviceNet communication and integrates seamlessly with Ethernet/IP networks in industrial automation systems.

Question: Where can I find the manual for the 1756-DNB?
Date Update:30/05/2025
Answer:

The manual for the 1756-DNB is available on the Rockwell Automation website under the Product Documentation section. The manual contains detailed installation, wiring, troubleshooting, and programming information. It also provides configuration instructions for integrating the 1756-DNB into your ControlLogix system and setting up communication with DeviceNet devices.

Question: How do I wire the 1756-DNB module?
Date Update:30/05/2025
Answer:

Wiring the 1756-DNB involves connecting it to a DeviceNet network and a ControlLogix system. Here’s the general wiring process:

  • Power Supply Wiring:
    Connect the 24V DC power supply to the +24V DC and 0V (ground) terminals on the 1756-DNB.
  • DeviceNet Wiring:
    Connect the DeviceNet cable to the DeviceNet port on the 1756-DNB module.
    The DeviceNet network must be terminated at both ends, using DeviceNet terminators to ensure proper signal integrity.
  • ControlLogix Connection:
    Insert the 1756-DNB into a slot in the ControlLogix chassis.
    Make sure that the ControlLogix system is properly powered and that the Ethernet/IP network is configured for communication with the 1756-DNB.

Detailed wiring diagrams are provided in the manual, which should be referred to for proper wiring connections.

Question: What are the fault codes on the 1756-DNB, and what do they mean?
Date Update:30/05/2025
Answer:

The 1756-DNB module uses LED indicators to communicate fault and status information. Here are some common fault codes and their meanings:

  • Green LED (Network Status): Indicates normal communication with the DeviceNet network.
  • Red LED (Fault): Indicates a fault condition, which could be:
    Network communication failure: The module is unable to establish or maintain communication with the DeviceNet network.
    Power issues: The module is not receiving the correct 24V DC power.
    DeviceNet configuration error: The network may have improper device configuration or incompatible devices.
  • Amber LED (Module Status): Indicates the module is in standby mode or experiencing a non-critical issue.

Diagnostic codes and solutions can be found in the manual, which provides detailed steps for troubleshooting each error condition.

Question: What devices can the 1756-DNB communicate with?
Date Update:30/05/2025
Answer:

The 1756-DNB module allows communication with any DeviceNet-compatible devices. These devices can include:

  • I/O modules (e.g., digital and analog I/O)
  • Motor drives (e.g., PowerFlex drives)
  • HMIs and panel controllers
  • Sensors, actuators, and remote I/O devices
  • Safety devices (e.g., emergency stop buttons, light curtains)

DeviceNet is widely used for connecting field devices to industrial control systems, and the 1756-DNB enables seamless integration into the ControlLogix system.

IQElectro is not an authorized distributor.
QElectro LLC (IQElectro) is NOT an Authorized Distributor or in any way affiliated with Rockwell Automation, Siemens, or any other Manufacturers. IQElectro is NOT an Authorized Dealer of this product. The product may be of older version, date codes, or design than that available from authorized dealers. As IQElectro is not an authorized dealer of this product, the Original Manufacturer's Warranty and Support DO NOT apply. IQElectro sells SURPLUS only and DOES NOT SELL SOFTWARE or FIRMWARE licenses For more detailed information, please refer to the full version of our disclaimer policy Disclaimer Policy.
Description / Specifications

Description 

Allen Bradley ControlLogix Scanner Module with 125, 250, or 500 kilobites per second DeviceNet Communication Rates.

 

Technical Specifications 

 

Brand Allen-Bradley
Series ControlLogix
Part Number 1756-DNB
Manufacturer Rockwell Automation
Module Type Scanner Module
DeviceNet Communication Rates 125, 250, or 500 kilobites per second
Location ControlLogix Chassis (any slot)
Backplane Current (5Volts) 580 milliamps
Backplane Current (24Volts) 3 milliamps
Power Dissipation (Max) 5.8 Watts
Thermal Dissipation 19.8 BTU per hour
DeviceNet Current 11-25 Volts DC
Insulation Voltage 30 Volts Continuous
Operating Temperature 0-60 Celsius (32-140 Fahrenheit)

  

 

Information About 1756-DNB

The Allen-Bradley 1756-DNB is a DeviceNet Scanner module that connects to a ControlLogix system. It serves as a bridge that collects data from the DeviceNet modules and then delivers a copy of the information to the controller and vice versa. Using the 1756-DNB scanner module, the user can expect DeviceNet communication rates of 125 kilobytes per second by default, 250 kilobytes per second, and up to 500 kilobytes per second. It has DeviceNet node addresses 00 to 63, with node address 63 set by default and a maximum of 64 nodes. It is only compatible with the Logix5550 controller. This particular module acts as a gateway between DeviceNet devices and the network in order to read input and write output from a device, download the configuration data, and monitor the operational status of a device.

The Allen-Bradley 1756-DNB will communicate in the form of Diagnostic Tables, Inputs, and Outputs when the controller is involved. The I/O’s exchange configuration data, status information, and the I/O data of the device. The module communicates using strobe, poll, change of state, and/or cyclic messages with another device. These messages are used to gather from or deliver data to every device. The data received from a device will then be organized and made available to the controller (input data) and the data received from the controller will be sent to the device (output data). The 1756-DNB's current draw at 5.1 Volts DC is 400 milliamps while it stays at 0 milliamps when the current draw is at 24 Volts DC. The power dissipation of this module is around 3.5 Watts and its thermal dissipation is at 11.9 BTU/hour. This module can be installed in any available chassis slot and is used together with the RSNetWorx.

.


Manufacturer information

Allen-Bradley, a brand of Rockwell Automation, specializes in manufacturing industrial automation equipment. The product range includes programmable logic controllers (PLCs), motion control systems, safety devices, motor control equipment, automation software, and HMI panels. Allen-Bradley products are known for their reliability and integration with other systems.

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