Allen-Bradley 1756-CNB ControlNet Bridge Module

Series#: AllenBradley

Product Details

The 1756-CNB ALLEN-BRADLEY ControlNet Bridge Module ensures seamless network integration for ControlLogix platforms.
Supports redundant media and dual-channel ControlNet communication for high-availability systems.
Provides network scheduling and data transfer between ControlNet and ControlLogix backplane.
Compact module design fits standard 1756 chassis with no additional power supply requirements.
Ideal for mid-to-large automation networks requiring deterministic, real-time control.

Specification

The 1756-CNB ALLEN-BRADLEY is a high-performance ControlNet Bridge Module engineered for the ControlLogix platform. It acts as the gateway between the ControlNet network and the local backplane, enabling deterministic, real-time data exchange for distributed automation systems. This module supports both redundant and non-redundant ControlNet configurations, ensuring maximum uptime in critical industrial applications. With its robust design, the 1756-CNB handles network scheduling, message routing, and I/O data transfer with minimal latency, making it a cornerstone for scalable, high-availability control networks.

Parameter	Specification
Product Type	ControlNet Bridge Module
Compatible Platform	ControlLogix 1756 Series
Network Interface	Coaxial BNC (RG-6) for ControlNet
Number of Ports	2 (A and B channels for redundant media)
Data Rate	5 Mbps (ControlNet standard)
Maximum Nodes	99 nodes per network segment
Backplane Current Draw	1.0 A at 5.1 VDC (typical)
Power Dissipation	5.1 W (maximum)
Operating Temperature	0°C to 60°C (32°F to 140°F)
Storage Temperature	-40°C to 85°C (-40°F to 185°F)
Relative Humidity	5% to 95% non-condensing
Module Keying	Electronic keying (compatible with standard 1756 backplane)
LED Indicators	Status, Network Activity, Module OK, Channel A/B
Dimensions (H x W x D)	144 mm x 35 mm x 105 mm (5.67 in x 1.38 in x 4.13 in)
Weight	Approximately 0.25 kg (0.55 lb)
Certifications	CE, UL, CSA, ATEX (Class I, Div 2)