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1756-CNBR

ControlNet Bridge Module 1756-CNBR | Allen-Bradley Redundant

In stock (20 units), ready to be shipped

  • Manufacturer: Allen-Bradley

  • Product No.: 1756-CNBR

  • Product Type: Communication Module

  • Product Origin: USA

  • Payment:T/T, Western Union

  • Weight: 293g

  • Shipping port: Xiamen

  • Warranty: 12 months

30-Day Return Policy · 12-Month Warranty
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Description

Allen-Bradley ControlLogix ControlNet Redundant Bridge Module 1756-CNBR

The Allen-Bradley 1756-CNBR is a high-availability communication bridge for ControlNet networks. It provides dual media ports for simplex or redundant network configurations, ensuring robust data transfer. 

Core Specifications

  • Brand & Model: Allen-Bradley 1756-CNBR
  • Series: ControlLogix ControlNet Communication Module
  • Function: Redundant Media Bridge
  • ControlNet Ports: 2 BNC Connectors (for redundant/simplex media)
  • Network Access Port (NAP): 1 RJ-45 (8-pin) for local programming
  • Data Rate: 5 Mbps
  • Max Connections: 64 total (supports 40-48 Logix connections)
  • Max Nodes: 99 per network
  • Backplane Current: 970 mA @ 5.1V DC, 1.7 mA @ 24V DC

Installation & Compatibility

  • Compatible Chassis: 1756-A4, A7, A10, A13, A17 ControlLogix racks.
  • Power Supplies: Works with standard (e.g., 1756-PA75) and redundant (e.g., 1756-PA75R) supplies.
  • Slot Requirement: Occupies 1 slot in the chassis.
  • Communication Cable: Requires 1786-RG6 quad-shield coaxial cable and ControlNet taps.
  • Important: Correctly label tap drop cables to prevent segment reversal and network issues.

Physical & Environmental

  • Dimensions: 5.51" x 4.41" x 5.71" (140 x 112 x 145 mm approx.)
  • Weight: 0.64 lbs (0.293 kg)
  • Operating Temperature: 32° to 140°F (0° to 60°C)
  • Power Dissipation: 5.5 Watts Max (17.4 BTU/hour)
  • Isolation Voltage: 30V Continuous
  • Enclosure: Open Type (for chassis mounting)

Packaging & Shipping

  • One Allen-Bradley 1756-CNBR bridge module.
  • Standard protective packaging.
  • Shipped via FedEx, UPS, or DHL.

FAQ

  • What is the difference between 1756-CNB and 1756-CNBR?
    The 1756-CNBR has two ControlNet BNC ports to support redundant media, while the 1756-CNB has only one port for simplex networks.
  • What is the Network Access Port (NAP) used for?
    The RJ-45 NAP port is used for local programming, configuration, and diagnostics of the module using a laptop or programming device.
  • Can this module be used in a non-redundant network?
    Yes, it can be used in a standard simplex ControlNet network using just one of its two BNC ports.
🏷️ Tags: Communication Module

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  • Ensure compatibility with your current machinery or control systems.
  • Reach out via sale@etowonauto.com or +8617859788089 for technical assistance.
  • Review delivery options, lead times, and shipping requirements.
  • Follow manufacturer instructions and best practices during installation.

In-stock items are typically dispatched the same business day. For products not currently in stock, dispatch times may vary based on availability. International shipping is available, and shipping costs are calculated according to destination, weight, and carrier selection.

Returns are accepted within 30 days of receipt, provided items are unused and in original condition. Return shipping costs are the responsibility of the customer. Please contact us before returning any item to receive return authorization.

For more details, please review our Shipping & Return Policy.

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