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Allen Bradley 1756-CNB ControlLogix Communication Module
- Product Details
- FAQs
- Related
- Contact Us
- Packing & Delivery
- Product Ratings
Product Introduction
The Allen-Bradley 1756-CNB is a ControlLogix single-channel ControlNet communication module designed for reliable industrial networking. It provides deterministic real-time data communication between ControlLogix controllers, I/O modules, and other ControlNet devices. The module is optimized for mid-scale automation systems that require robust communication with a limited number of nodes.
The 1756-CNB is ideal for applications where simple, efficient, and stable network connectivity is needed, offering a cost-effective solution for standard ControlNet networks while ensuring compatibility with ControlLogix systems and 24 VDC industrial environments.
Product Specifications
| Parameter | Description |
|---|---|
| Product Type | ControlLogix Communication Module |
| Module Performance | Single-channel |
| Communication Protocol | ControlNet |
| Ports | 1 |
| Communication Rate | 5 Mbps |
| Maximum Nodes | 99 |
| Voltage | 24 VDC |
| System Compatibility | ControlLogix chassis and controllers |
| Industrial Rating | Designed for industrial automation networks |
| Power Dissipation | 6.7 W |
| Thermal Dissipation | 22.9 BTU/h |
| Operating Temperature | 0 to 60 °C |
| Storage Temperature | -40 to 85 °C |
| Enclosure Type Rating | Open-style |
| Dimensions | 144.5 × 34.6 × 130.18 mm |
| Weight | 0.26 kg |
Applications
• Used for ControlNet communication in small- to mid-sized ControlLogix systems
• Suitable for real-time data transmission between controllers, I/O modules, and networked devices
• Applied in manufacturing, process automation, and discrete production systems
• Enables deterministic communication for distributed control systems
• Ideal for applications requiring stable, single-channel ControlNet connectivity
Advantages
• Single-channel design simplifies installation and configuration
• Supports up to 99 nodes, providing sufficient capacity for medium-sized networks
• Deterministic 5 Mbps communication rate ensures reliable real-time data transfer
• 24 VDC operation is compatible with standard industrial control power supplies
• Compact module design optimizes chassis space and installation flexibility
• Designed for robust performance in industrial environments with standard temperature ranges
FAQ
-
What is the primary function of the 1756-CNB?
It provides single-channel ControlNet communication for ControlLogix systems. -
How many nodes can this module support?
It supports up to 99 nodes on the ControlNet network. -
What is the communication speed?
The module transmits data at 5 Mbps. -
Can it be used with multiple controllers?
Yes, it communicates with multiple ControlLogix controllers, I/O modules, and devices. -
Is the module suitable for open-style panels?
Yes, it has an open-style enclosure rating for industrial panel installation. -
Does it require 24 VDC power?
Yes, the module operates using a 24 VDC power supply. -
Is redundancy supported?
No, this is a single-channel module; redundancy requires a dual-channel or high-performance module. -
What is the operating temperature range?
The module operates from 0 to 60 °C. -
How is it installed in a ControlLogix system?
It is mounted in a ControlLogix chassis and communicates through the backplane. -
What happens if more nodes are added beyond the maximum?
Network performance may degrade, and some nodes may fail to communicate properly.
Related Models
| Model | Description |
|---|---|
| 1756-CN2 | Standard ControlNet communication module |
| 1756-CN2R | Redundant ControlNet module |
| 1756-CN2RK | High-performance dual-channel ControlNet module |
| 1756-EN2TR | EtherNet/IP communication module |
| 1756-CN2E | Enhanced ControlNet communication module |
| 1756-CN2T | ControlNet trunk module |
Popular Models
| Model | Description |
|---|---|
| 1756-L81E | ControlLogix high-performance controller |
| 1756-L83E | Advanced ControlLogix controller |
| 1756-PA75 | ControlLogix AC power supply |
| 1756-A13 | 13-slot ControlLogix chassis |
| 1756-IF16 | 16-channel analog input module |
| 1756-OB16I | 16-channel DC isolated output module |
| Company Information | ||||||||
| [email protected] | ||||||||
| Mobile | +8613666033393 | |||||||
| +8613666033393 | ||||||||
| 13666033393 | ||||||||
| Add | Room 1004, No. 62 Xiangxiu Li, Siming District, Xiamen City, Fujian Province, China | |||||||
Excellent PLC Co., Ltd. has a large number of brand new and original PLC and DCS spare parts, with more than 60 cooperative countries. All products are guaranteed for 1 year and delivered to you by high-quality express. We are committed to using the best products and the most favorable prices to meet the needs and friendship of our customers. We have won the trust of thousands of customers, including these excellent customers.
As for the delivery time, when we receive your order requirements, we will arrange for warehouse personnel to test and verify the products. After you place the order, we will send it to you within 24 hours.
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