1-919-535-3180 | 1-800-360-6802

GE / IP FANUC Series 90/30 In Stock

A Global Supplier of Industrial Electronics



Mon-Fri 8AM-5PM EST



Rated 4.2/5 Based on 30 ratings.

Rate your purchase of the 1756-CNB

Image of

Image of

Includes a PDF Electric and Supply warranty.

(Never Used)


6 In Stock

3 Yr PDF Supply warranty

What is Surplus?



30 In Stock

2 Yr PDF Supply Warranty

What is Refurbished?

Repair Service


5-10 Days

2 Yr PDF Supply warranty


Other Available Revisions for the 1756-CNB 1756-CNB/A1756-CNB/B1756-CNB/C1756-CNB/D1756-CNB/E

Common misspellings:
  • l756-CNB
  • 1756-CN8
  • 1756CNB

The 1756-CNB is an Allen-Bradley ControlNet bridge that can be used to communicate within control networks. Unlike other communication modules in the 1756 series, the 1756-CNB uses either a standard or non-redundant configuration. If the users’ application contains 40 to 80 Logic connectors per every single module, then the 1756-CNB is an ideal option. With a communication rate of 5 megabytes per second as well as 99 nodes, this Allen-Bradley communication module gives superior speeds to industrial projects. The 1756-CNB does two things: controlling the I/O data—especially when it is used with the Logix5550 controllers for both scheduled and unscheduled data and bridging data that travels between ControlLogix backplanes as well as ControlNet Networks. Make sure that the path information is correct to properly route the messages it receives.

The 1756-CNB, which belongs to the ControlLogix series, it draws a current of 970 mA 5.1 Volts DC. However, if the voltage is 24 Volts DC, its current draw is 1.7 mA. The unit’s power dissipation rate is estimated at 5.14 Watts. The 1756-CNB can support up to 64 bidirectional connections that exist with other ControlNet-based devices. it can be used for both scheduled and unscheduled connections, depending on the configuration of the network. For instance, if the application demands more connections, it will be advisable to add another 1756-CNB module. However, ensure that it is done on the same chassis and network. The module can also be used with 20 other buffers designed for unconnected messages.This Allen-Bradley comes with two ports – one designed for ControlNet BNC and the other for ControlNet RJ45. This bridge module’s thermal dissipation is 17.4 BTU per hour and its slot width is 1 millimeters. The unit weighs 0.57 pounds (0.26 kilograms) and it comes with an open-type enclosure.

1756CNB Allen Bradley SLC 500 Bridge module AB Rockwell Automation

All online orders placed before 4:30 PM EST “SHIPS SAME DAY FREE!" World’s largest warehouse of Factory Sealed GE 90-30 PLC, GENIUS I/O and RX7i PACSystem.highlight_off

PDF Electric & Supply Inc. sells new, new surplus and refurbished products which are sourced through independent channels. All warranties and support, if applicable, are with PDF Electric & Supply Inc. and not the manufacturer. PDF Electric & Supply Inc. is not an authorized distributor or representative for the listed manufacturers and makes no representations as to any quality control performed by any listed manufacturer on the products. The products listed on this website may vary as to their country of origin; the accessories, and other items included with the product; and the language used on the packaging, the parts, and any related instructions or printed material related to the products. This website is not sanctioned or approved by any manufacturer or tradename listed. Designated trademarks, brand names and brands appearing herein are the property of their respective owners.