1756-CNBR Allen-Bradley Media Bridge Module

Allen-Bradley 1756-CNBR ControlNet Bridge Module

Technical Specifications

• Manufacturer and Brand: Allen-Bradley
• Model Number: 1756-CNBR
• Series: ControlLogix
• Module Type: ControlNet Bridge Communication Module
• Communication Speed: 5 Mbps
• Maximum Connections: 64 total connections
• Logix Connections: 40-48 simultaneous connections
• Backplane Current: 970 mA at 5.1V DC, 1.7 mA at 24V DC
• Maximum Power Dissipation: 5.5 Watts
• Operating Temperature: 0-60°C (32-140°F)
• Slot Width: 1
• Weight: 0.64 lbs (0.293 kg)

Compatible Hardware

• The module works with various ControlLogix chassis including 1756-A4, A7, A10, A13, A17
• It supports standard power supplies: 1756-PA72/C, PA75/B, PB72/C, PB75/B, PC75/B, PH75/B
• The module works with redundant power supplies: 1756-PA75R, PB75R, PSCA2
• Use 1786-RG6 quad shield RG6 coaxial cable for optimal network performance
• The module fits in any available slot in your ControlLogix chassis

Network Configuration

• This module enables both scheduled and unscheduled data communication
• It bridges data between the ControlLogix backplane and ControlNet network
• The redundant media capability prevents communication loss from cable disconnects
• You can configure the module for simplex or redundant network operation
• The system supports up to 20 buffers for unconnected messages

Installation Guidelines

• Always verify tap drop cable labels before making connections
• Ensure proper cable termination to maintain network integrity
• The module draws power directly from the ControlLogix backplane
• You can install the module in any available slot in compatible chassis
• Follow proper electrostatic discharge precautions during handling

Frequently Asked Questions (FAQ)

What is the condition of your 1756-CNBR modules?

• We supply only brand new, original Allen-Bradley modules. Each unit comes in factory-sealed packaging with full manufacturer warranty.

How fast is your shipping process?

• We process and ship all orders within 5 business days. You will receive tracking information immediately after shipment.

Which shipping carriers do you use?

• We utilize major global carriers including DHL, FedEx, and UPS for reliable and fast delivery worldwide.

What is your return policy?

• We provide a 30-day return policy for all products. Contact our sales team for return authorization and instructions.

What makes the CNBR different from CNB?

• The 1756-CNBR has two ControlNet BNC ports for media redundancy, while the CNB has only one. Both have the RJ45 programming port.

What cable should I use for ControlNet?

• We recommend 1786-RG6 quad shield RG6 coaxial cable for optimal network performance and signal integrity.

How many nodes can this module support?

• The 1756-CNBR supports up to 99 nodes maximum on the ControlNet network for comprehensive system integration.

For technical specifications and pricing, contact: sales@nex-auto.com