In modern industrial automation, reliable communication between remote I/O and PLCs is essential. The Schneider Electric CRA module enables efficient Ethernet-based remote I/O connectivity in PLC and DCS systems, improving scalability, diagnostics, and overall networked automation performance.
Product Details
Overview
The 1756-CNB (1756-CNB) is a high-performance communication bridge specifically designed for the ControlLogix® platform. It facilitates deterministic, high-speed data transfer between a controller and remote I/O devices or other controllers across a ControlNet™ network. This module serves as a critical link in industrial architectures requiring scheduled data delivery and hardware redundancy. By occupying a single slot in any 1756 chassis, it provides the backbone for coordinated motion, complex drive control, and distributed process automation.
Detailed Technical Specifications
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Network Interface: ControlNet Bridge
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Transmission Rate: 5 Mbps fixed
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Node Capacity: Supports up to 99 nodes per network
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Logical Connections: 64 maximum connections
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Backplane Current (5.1V DC): 970 mA
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Backplane Current (24V DC): 1.7 mA
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Total Power Dissipation: 5.1 Watts
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Thermal Output: 17.4 BTU per hour
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Chassis Slot Width: 1 (Single Slot)
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Configuration Interface: RSNetWorx for ControlNet
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Diagnostic Indicators: Status LEDs for module health and network activity
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Operating Temperature: 0 to 60 °C (32 to 140 °F)
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Storage Temperature: -40 to 85 °C (-40 to 185 °F)
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Relative Humidity: 5 to 95% non-condensing
Operational Capabilities
The 1756-CNB (1756-CNB) allows for seamless bridging between networks without the need for additional programming. It supports the producer/consumer model, which optimizes network bandwidth by allowing multiple nodes to consume the same data simultaneously. This module is essential for applications where timing is critical, such as high-speed bottling lines or synchronized axis control, ensuring that control data arrives at its destination with minimal jitter.
Engineering FAQ
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Does the 1756-CNB support redundant media?The 1756-CNB (1756-CNB) features two BNC connectors for redundant coaxial cable connections. This ensures that if one cable path is severed, the module continues to communicate via the secondary path without system interruption.
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How do I set the node address for this module?The node address (01–99) is manually selected using the two rotary switches located on the side of the module before installation into the chassis.
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What is the difference between the 1756-CNB and 1756-CN2?While both are ControlNet bridges, the 1756-CNB (1756-CNB) is the standard performance version. The 1756-CN2 series offers significantly higher connection capacities and faster CPU processing for larger, more complex I/O trees.
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.
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