Allen-Bradley 1756-CN2 ControlNet Bridge Module

Series#: AllenBradley

Product Details

1756-CN2 ControlNet Bridge Module – High-speed deterministic network interface for Allen-Bradley Logix5000 controllers.
Seamlessly integrates remote I/O, drives, and smart devices via dual redundant ControlNet media.
Supports up to 48 nodes per network with 5 Mbps data rate for real-time control.
Hot-swappable design minimizes downtime in critical manufacturing environments.
Compatible with 1756 backplane and all ControlNet scheduling software (RSNetWorx for ControlNet).
Guaranteed 100% Original factory condition, offering fast and secure worldwide delivery.

Specification

The 1756-CN2 is a high-performance ControlNet bridge module engineered by Allen-Bradley for the Logix5000 platform, enabling deterministic, high-speed communication between controllers, remote I/O, and automation devices across a single coaxial or fiber network. This module is essential for applications requiring synchronized motion, safety, or process control, offering dual-media redundancy and advanced scheduling capabilities. Built for harsh industrial environments, the 1756-CN2 ensures reliable data transfer at 5 Mbps with support for up to 48 nodes, making it a cornerstone of modern distributed control systems (DCS) and SCADA architectures. Each unit is rigorously tested to meet Rockwell Automation’s stringent quality standards, guaranteeing 100% original and new condition with no refurbished components.

Parameter	Specification
Product Type	ControlNet Bridge Module
Model Number	1756-CN2
Network Interface	ControlNet (Coaxial or Fiber Optic, BNC or ST connector)
Data Rate	5 Mbps (fixed)
Maximum Nodes per Network	48
Network Length (Coaxial)	1000 m (segment) / 2500 m with repeaters
Network Length (Fiber Optic)	3000 m (multimode) / 20 km (singlemode with external media)
Backplane Current	1.5 A Standard Models 5.1 V DC (from 1756 chassis backplane)
Power Dissipation	7.65 W typical
Communication Protocol	CIP (Control and Information Protocol) over ControlNet
Redundancy Support	Dual-media redundancy (two BNC connectors for A and B channels)
Diagnostic LEDs	OK, Module Status, Network Status, Channel A, Channel B
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
Vibration Resistance	5 g Standard Models 10–500 Hz (operating)
Shock Resistance	30 g (operating)
Enclosure Type	Open-style (fits 1756 chassis slot)
Weight	0.34 kg (0.75 lb)
Certifications	CE, UL, CSA, ATEX (hazardous location), IECEx
Compatible Controllers	1756-L6x, L7x, L8x series Logix5000 controllers
Software Requirements	RSLogix 5000 v16 or later; RSNetWorx for ControlNet v8.0 or later
Warranty	1-year manufacturer warranty (extended available)