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
Evolving SCADA System Architectures in Industrial Automation
A robust Supervisory Control and Data Acquisition (SCADA) system serves as the heartbeat of modern industrial operations. Understanding SCADA system architecture is vital for engineers designing efficient control systems. These architectures have evolved from isolated, monolithic structures to highly interconnected, networked ecosystems. Choosing the right design requires balancing data visibility, processing power, and long-term scalability requirements.
Choosing the Right Controller: PLC vs. Motion Controller in Industrial Automation
Selecting the optimal control architecture is a foundational decision in industrial automation. Engineers must frequently choose between a Programmable Logic Controller (PLC) and a dedicated Motion Controller. While both systems manage machinery, their underlying design philosophies differ significantly, impacting performance, scalability, and system integration.
Mastering PLC Power Supply Architectures and Operating Voltages
Selecting the correct operating voltage is a critical step in designing reliable industrial automation systems. Whether you are working with a compact PLC or a large-scale DCS, your power architecture dictates the system's longevity. In this guide, we explore the standard voltage ranges and power distribution strategies required to maintain stable factory automation operations.