Product Details
Overview
The Allen-Bradley 1756-CN2R is a ControlLogix ControlNet communication bridge module designed to provide reliable high-speed network connectivity for PLC systems. Supporting up to 99 nodes and 131 simultaneous connections, this module enables efficient data exchange between ControlNet-enabled devices and the ControlLogix chassis. Ideal for both standard and redundant network configurations, it ensures consistent performance in demanding industrial environments.
Technical Specifications
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Manufacturer: Allen-Bradley (Rockwell Automation)
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Model / Part Number: 1756-CN2R
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Product Type: ControlLogix Communication Module
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Series: ControlLogix
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Module Type: Bridge Module
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Maximum Nodes: 99
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Maximum Connections: 131
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ControlNet Data Rate: 5 Mbps
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Number of ControlNet Ports: 2
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USB Port: 1 (Data rate 12 Mbps)
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Backplane Current Draw: 1.3 A at 5.1 VDC; 3 mA at 24 VDC
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Power Dissipation (Max): 6.7 W
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Thermal Dissipation: 22.9 BTU/hr
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Isolation Voltage: 30 VDC continuous
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Compatible Standard Power Supplies: 1756-PA72/C, 1756-PA75/B, 1756-PB72/C, 1756-PB75/B, 1756-PC75/B, 1756-PH75/B
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Compatible Redundant Power Supplies: 1756-PA75R, 1756-PB75R, 1756-PSCA2
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Compatible Chassis: 1756-A4, 1756-A7, 1756-A10, 1756-A13, 1756-A17
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ControlNet Cable: 1786-RG6 quad shield RG6 coaxial cable
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Mounting: Any 1756 chassis, slot width 1
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Dimensions (L×W×H): 5.51 × 4.41 × 5.71 in (14 × 11.2 × 14.5 cm)
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Weight: 0.94 lbs (0.43 kg)
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Operating Temperature: 0–60 °C (32–140 °F)
Key Features
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High-speed ControlNet communication for large-scale PLC systems
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Supports redundant network configurations for critical applications
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Backplane-compatible with all standard ControlLogix chassis
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Low power consumption with efficient thermal management
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Provides two ControlNet ports plus one USB port for flexible connectivity
Applications
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Network bridge for ControlNet PLC systems
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Integration of multiple ControlLogix modules in manufacturing and process control
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Redundant network setups requiring reliable communication and failover
FAQs
Q1: How many nodes can the 1756-CN2R support?
The module supports up to 99 ControlNet nodes, suitable for large networked PLC systems.
Q2: Can it operate with redundant power supplies?
Yes, it is compatible with redundant units such as 1756-PA75R, 1756-PB75R, and 1756-PSCA2.
Q3: What chassis are compatible?
Compatible with 1756-A4, A7, A10, A13, and A17 chassis.
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
Strategic Selection: Choosing the Right SCADA Software for Your PLC Project
In industrial automation, the SCADA (Supervisory Control and Data Acquisition) system acts as the bridge between raw machine data and actionable human intelligence. Selecting the incorrect software platform can lead to integration bottlenecks, scalability issues, and excessive long-term maintenance costs. As an automation consultant with 15 years of experience, I have guided many projects through the selection process. Below are the essential criteria for choosing a platform that ensures both performance and longevity.
Ensuring Operational Continuity: The Strategic Value of Redundant Automation Systems
In modern industrial landscapes, unplanned downtime is the ultimate adversary. For sectors relying on complex PLC and DCS architectures, a single hardware failure can trigger catastrophic production losses. Therefore, implementing redundant automation systems is no longer a luxury; it is a fundamental requirement for mission-critical operations. In this article, I analyze why redundancy remains the backbone of reliable industrial infrastructure.
Selecting the Right Cables for Industrial Automation: A Comprehensive Guide
Selecting the appropriate cabling infrastructure is critical for the success of any industrial automation project. Improper cable selection often leads to signal degradation, system instability, and costly downtime. As an automation engineer, I frequently see projects compromised by poor cabling choices in harsh industrial environments. This guide simplifies the complex landscape of cabling to help you make informed decisions for your PLC, DCS, and control systems.