Product Details
Overview
The Allen-Bradley 1756-CNBR is a high-performance ControlLogix communication module designed to provide reliable network connectivity for ControlLogix systems. This module supports multiple protocols and ensures seamless integration with distributed I/O networks, offering robust data transfer and efficient control communication.
Key Features
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Supports Ethernet/IP and ControlNet protocols
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Facilitates high-speed data exchange across ControlLogix networks
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Compact design suitable for ControlLogix chassis
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Ensures system reliability and reduces downtime in industrial applications
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Compatible with a wide range of Allen-Bradley controllers
Technical Specifications
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Manufacturer: Allen-Bradley / Rockwell Automation
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Model Number: 1756-CNBR
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Product Type: ControlLogix Communication Module
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Product Line: ControlLogix
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Voltage: 5.0 V DC backplane
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Current Consumption: 0.3 A typical @ 5V DC
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Network Protocols: Ethernet/IP, ControlNet
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Communication Ports: 2 RJ45 connectors for network integration
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Module Type: Communication/Interface
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Dimensions (HxWxD): 12.7 x 3.5 x 10.2 cm (5 x 1.38 x 4 in)
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Weight: 0.25 kg (0.55 lbs)
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Operating Temperature: 0–60°C (32–140°F)
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Storage Temperature: -40–85°C (-40–185°F)
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Compatible Controllers: ControlLogix L-Series and R-Series
Applications
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Network communication for ControlLogix systems
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Integration with distributed I/O and remote devices
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Reliable data transfer for industrial automation networks
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Suitable for redundant and multi-protocol environments
FAQ
Q1: Which protocols does 1756-CNBR support?
A1: This module supports Ethernet/IP and ControlNet for seamless ControlLogix integration.
Q2: Can it be installed in any ControlLogix chassis?
A2: Yes, it fits standard ControlLogix L-Series and R-Series chassis.
Q3: What is the maximum network distance supported?
A3: Maximum distance depends on cabling and network configuration, typically up to 100 meters per Ethernet segment.
Q4: Is it compatible with Series B controllers?
A4: No, it is designed for L-Series and R-Series ControlLogix systems only.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
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In industrial automation, the Emergency Stop (E-Stop) pushbutton is the ultimate safety line. However, relying on a single Normally-Closed (NC) contact can sometimes lead to unexpected spurious trips. As a control systems engineer, I have seen these nuisance trips halt entire production lines, causing significant downtime. Understanding why these components fail and how to implement robust architecture is essential for any reliable DCS or PLC-based safety system.
Sequencing Induction Motor Control with PLC Logic: Best Practices
In modern industrial automation, controlling a group of induction motors requires precision and safety. Uncontrolled simultaneous startup of multiple large motors often causes significant voltage dips, potentially triggering protective trips. Therefore, implementing a sequential startup and shutdown strategy is essential. This approach minimizes inrush current and ensures the system operates within established power constraints. A robust PLC program serves as the ideal engine for orchestrating these sequences.
Mastering PLC Programming: Best Practices for Robust Industrial Automation
Writing clean PLC code requires discipline, especially regarding memory management. Avoid overusing SET and RESET instructions, as they often complicate debugging. If multiple rungs control the same bit, troubleshooting becomes a nightmare. Instead, focus on energizing a bit in only one location. If your logic requires complex conditions, use branches within a single rung. This approach keeps your code readable, maintainable, and significantly easier to audit during downtime.