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1756-CNBR
1756-CNBR
Allen Bradley 1756-CNBR ControlNet Bridge Module
  1. 1756-CNBR
  2. 1756-CNBR
  3. Allen Bradley 1756-CNBR ControlNet Bridge Module

Allen Bradley 1756-CNBR ControlNet Bridge Module

£915.35 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 1756CNBR
Series ControlLogix Communication Modules
Type ControlNet Bridge Module
Communication Rate 5 Mbps (fixed)
Media Type Coaxial (RG-6 quad-shield)
Connector Type 2 x BNC (for redundant or single trunk)
Enclosure Type Open module, designed for chassis installation
Mounting Type Chassis-mounted (ControlLogix 1756 series)
Power Dissipation 4.1 W typical
Isolation Voltage 30V (continuous), basic insulation
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Allen Bradley 1756-CNBR ControlNet Bridge Module

The AB 1756-CNBR is a high-speed ControlNet bridge module designed for use within ControlLogix systems. Offering redundant media support for mission-critical applications, it enables real-time control and information sharing over ControlNet at a fixed rate of 5 Mbps.

Technical Specifications

Model 1756CNBR
Series ControlLogix Communication Modules
Type ControlNet Bridge Module
Media Support Redundant Coaxial
Communication Rate 5 Mbps (fixed)
Maximum Connections 40–48 (any mix of scheduled/unscheduled)
Redundancy Mode Dual BNC ports for redundant trunk lines
Backplane Interface ControlLogix 1756 chassis (via backplane)

Electrical Specifications

Power Supply Supplied via ControlLogix chassis backplane
Backplane Current (5.1V) 800 mA
Backplane Current (24V) 3 mA
Power Dissipation 4.1 W typical
Isolation Voltage 30V (continuous), basic insulation
Power Protection Reverse polarity and overvoltage protection via chassis

Network & Interface Specifications

Supported Protocol ControlNet
Media Type Coaxial (RG-6 quad-shield)
Connector Type 2 x BNC (for redundant or single trunk)
Scheduling Supports scheduled and unscheduled traffic
Node Addressing Rotary switch configurable
Network Diagnostics Status LEDs for module health, activity, and redundancy
Connection Capacity 40 connections for ControlLogix controller 48 connections when used in remote I/O chassis Scheduling: Supports scheduled and unscheduled traffic Node Addressing: Rotary switch configurable Network Diagnostics: Status LEDs for module health, activity, and redundancy

Mechanical Specifications

Enclosure Type Open module, designed for chassis installation
Mounting Type Chassis-mounted (ControlLogix 1756 series)
Width 35 mm (1 slot)
Height 185 mm
Depth 140 mm
Weight Approx. 300 g
Installation Orientation Vertical, in ControlLogix rack
Locking Mechanism Chassis latching with backplane connector

Environmental Specifications

Operating Temperature 0…60 °C
Storage Temperature –40…85 °C
Relative Humidity 5% to 95% non-condensing
Shock Rating 30 g operating, 50 g non-operating
Vibration Resistance 2 g @ 10–500 Hz
Pollution Degree 2
Application Suitability Indoor use, control cabinet installation
Altitude Limit Up to 2000 m

Compliance & Certifications

Certifications UL, c-UL, CE, ATEX, RoHS
Standards Met EN 61131-2, IEC 61010-1, IEC 60068
EMC Compliance EN 61000-6-2 / 6-4
Use with ControlLogix 1756 chassis and modules
Safety Category General industrial use

Related Products & Helpful Links

Frequently Asked Questions

How can I check whether 1756-CNBR 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-CNBR 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-CNBR-Installation-Instructions.pdf
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Viewing: Allen Bradley 1756-CNBR ControlNet Bridge Module
SKU: 1756-CNBR

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