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1756-CN2R

Allen Bradley 1756-CN2R Redundant Interface Module

£1,780.15 inc VAT

In Stock · Delivered in 5–7 Working Days
Estimated UK delivery time, subject to order confirmation, courier services and destination. International delivery times vary.
Technical SpecificationsAllen Bradley
Model 1756CN2R
Series ControlLogix
Type Redundant ControlNet Communication Module
Communication Channels 2 (redundant dual ports)
Communication Protocol ControlNet
Backplane Communication Via 1756 backplane
Mounting Type 1756 Chassis Slot
Connector Type BNC Coaxial (one per channel)
Mounting ControlLogix rack (standard 1756 chassis)
Weight Approx. 300 g
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Allen Bradley 1756-CN2R Redundant Interface Module

The AB 1756-CN2R is a redundant ControlNet communication module designed for ControlLogix systems, providing high-performance, fault-tolerant communication across two independent ControlNet channels. With support for up to 128 Logix connections and dual active ports , this module enables seamless redundancy and high availability in mission-critical industrial control networks.

Technical Specifications

Model 1756CN2R
Series ControlLogix
Type Redundant ControlNet Communication Module
Logix Connections 128
Max Network Nodes 100 ControlNet devices
Communication Channels 2 (redundant dual ports)
Mounting Type 1756 Chassis Slot
Application High-availability distributed control, safety systems, motion control, and process automation

Electrical & Interface Specifications

Communication Protocol ControlNet
Network Speed 5 Mbps (standard ControlNet speed)
Connector Type BNC Coaxial (one per channel)
Redundancy Yes – Dual active channels for automatic failover
Backplane Communication Via 1756 backplane
Backplane Current Draw Approx. 500 mA @ 5.1V DC
Compatible Software RSNetWorx for ControlNet, Studio 5000
Power Supply Supplied via ControlLogix chassis backplane

Mechanical Specifications

Width 35 mm
Height 145 mm
Depth 140 mm
Mounting ControlLogix rack (standard 1756 chassis)
Form Factor Slot-based modular
Weight Approx. 300 g
Housing Industrial-grade module enclosure

Environmental Specifications

IP Rating IP20 (when installed in panel/chassis)
Operating Temperature 0…60 °C
Storage Temperature -40…85 °C
Humidity 5% to 95%, non-condensing
Vibration/Shock Resistance Complies with IEC 60068-2 standards
Certifications CE, cULus, RoHS
Explosion Safety (Gas/Dust) Not rated

Compliance & Communication

ControlNet Supported Yes (dual channel redundancy)
Data Highway / EtherNet/IP / DeviceNet / MODBUS / PROFIBUS / TCP/IP Not supported
Other Bus Systems Supported via ControlNet architecture
Diagnostic Features Built-in status LEDs and RSNetWorx diagnostics
Failover Capability Automatic switching between active and backup channels
Max Scheduled Connections Fully supported via ControlNet configuration tools

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Frequently Asked Questions

How can I check whether 1756-CN2R is the correct replacement?

Check the exact manufacturer part number, electrical ratings, interface type, mounting and equipment compatibility against your existing equipment and the manufacturer’s datasheet.

How quickly can 1756-CN2R be delivered?

This product is listed as in stock, with estimated UK delivery in 3–5 working days. Delivery depends on order confirmation, courier services and destination.

Where can I check specifications and compatibility?

Review the specification information above and the product’s Downloads or Data Sheets tab, where documents are supplied. Our team can help check part numbers and installation compatibility.

What warranty does Drive Outlet Megastore offer?

Drive Outlet offers its own 2-year return-to-base warranty unless otherwise stated. Manufacturer warranties may not apply; please review the Terms and Conditions before ordering.

Weight 0.3 kg

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1756-CN2R_Installation-Instructions.pdf1756-CN2R_Selection-Guide.pdf1756-CN2R_Technical-Data.pdf
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Viewing: Allen Bradley 1756-CN2R Redundant Interface Module
SKU: 1756-CN2R

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