Allen Bradley 1756-CNBR ControlLogix Communication Module

Product Introduction

The Allen-Bradley 1756-CNBR is a ControlLogix ControlNet communication module designed to provide robust, real-time network communication between controllers, I/O modules, and other networked devices. This module ensures deterministic data transfer and reliable connectivity for ControlLogix systems, making it suitable for industrial automation networks that require consistent performance under demanding conditions.

The 1756-CNBR module is particularly useful in medium- to large-scale ControlLogix networks, offering stable power consumption, efficient backplane communication, and integration with standard ControlNet topologies.

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Product Specifications

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Applications

• Used for real-time ControlNet communication in distributed ControlLogix networks

• Suitable for industrial automation systems requiring reliable data transfer between controllers and I/O modules

• Applied in process control, manufacturing, and batch automation systems

• Enables deterministic communication for industrial control and monitoring

• Ideal for applications requiring efficient and stable network operation with standard power consumption

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Advantages

• Deterministic data transfer ensures reliable communication across the network

• Low power requirements (1.0 A @ 5.1 VDC, 2 mA @ 24 VDC) minimize energy usage

• Seamless integration with ControlLogix controllers simplifies network setup

• Open-style enclosure allows flexible installation in industrial control panels

• Compact module design optimizes chassis space

• Designed for robust industrial performance in standard operating conditions

FAQ

1. What is the primary purpose of the 1756-CNBR module?
   It provides ControlNet communication for ControlLogix controllers and modules.

2. What power supply requirements does the module have?
   It requires 1.0 A at 5.1 VDC and 2 mA at 24 VDC.

3. Is the module suitable for open-style panels?
   Yes, it is rated for open-style mounting.

4. What is the operating temperature range?
   The module operates from 0 to 60 °C.

5. Can this module handle large-scale networks?
   Yes, it is designed for medium- to large-scale ControlLogix networks.

6. Does it support deterministic communication?
   Yes, the module provides real-time deterministic data transfer.

7. How is the module installed in a ControlLogix system?
   It is mounted in a ControlLogix chassis and communicates via the backplane with other modules.

8. Does it generate significant heat?
   No, power dissipation is 6.7 W with thermal dissipation of 22.9 BTU/h.

9. Can it be used in redundant network setups?
   Yes, it can be part of a network with redundancy, though redundancy depends on system architecture.

10. What are the advantages of using a CNBR module over a standard CN module?
    It provides enhanced power stability and reliable deterministic communication for industrial ControlNet networks.

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