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Allen Bradley 1756-CNB ControlNet Interface Module
1756-CNB
1756-CNB
  1. Allen Bradley 1756-CNB ControlNet Interface Module
  2. 1756-CNB
  3. 1756-CNB

Allen Bradley 1756-CNB ControlNet Interface Module

£1,228.15 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 1756CNB
Series ControlLogix
Interface Type Front panel BNC and NAP connectors
Type ControlNet Bridge Communication Module
Communication Rate 5 Mbps (ControlNet Standard)
Chassis Backplane Communication Yes
Media Type Single Media (Non-Redundant)
Enclosure Type Open (for chassis installation)
Messaging Types Scheduled and Unscheduled
Mounting Type DIN rail or chassis slot
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Allen Bradley 1756-CNB ControlNet Interface Module

The AB 1756-CNB is a ControlLogix communication bridge module designed for ControlNet network interfacing. It allows a ControlLogix chassis to send and receive data over a ControlNet network, functioning as a central bridge between controllers, remote I/O, and other networked devices in distributed industrial systems.

Technical Specifications

Model 1756CNB
Series ControlLogix
Type ControlNet Bridge Communication Module
Media Type Single Media (Non-Redundant)
Connectors 1 x BNC, 1 x NAP (RJ-45, 8-pin shielded)
Enclosure Type Open (for chassis installation)
Chassis Compatibility ControlLogix
Slot Occupancy 1 Slot
Application ControlNet communication for distributed I/O, peer-to-peer messaging, controller bridging

Electrical Specifications

Backplane Current Draw (5.1V) 350 mA
Backplane Current Draw (24V) 0 mA
Communication Rate 5 Mbps (ControlNet Standard)
Media Support Coaxial cable for BNC; twisted pair for NAP
ControlNet Scheduling Supported
Messaging Types Scheduled and Unscheduled
Maximum I/O Connections 128
Network Nodes Supported Up to 99
Status Indicators Module, Network, Node, OK

Mechanical Specifications

Mounting Type DIN rail or chassis slot
Width Standard 1-slot ControlLogix module
Height Standard ControlLogix chassis form factor
Depth Conforms to chassis depth
Interface Type Front panel BNC and NAP connectors
Hot-Swappable Yes
Module Keying Electronically keyed

Environmental Specifications

Operating Temperature 0…60 °C
Storage Temperature –40…85 °C
Relative Humidity 5%…95% non-condensing
Vibration/Shock Tolerance IEC 60068 compliant
Certifications CE, UL, cUL, C-Tick
Enclosure Rating None (installed in chassis)
Application in Commercial/Residential Areas Permitted

Compliance & Communication

Supported Protocols ControlNet
EtherNet/IP Not supported
MODBUS / TCP/IP Not supported
RS-232 / RS-485 / USB Not supported
Redundant Media No
ControlNet NAP Port Included (RJ-45)
ControlNet BNC Port Included
Integrated Switching No
Chassis Backplane Communication Yes

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Frequently Asked Questions

How can I check whether 1756-CNB 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-CNB 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 1.5 kg

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1756-CNB-Datasheet.pdf
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Viewing: Allen Bradley 1756-CNB ControlNet Interface Module
SKU: 1756-CNB

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