Description
The code “1746-NR8” refers to an Allen-Bradley 1746 Network Redundancy Module (NR8) used in industrial automation applications. Here’s a breakdown of the product details:
Product Name:
- Allen-Bradley 1746 Network Redundancy Module (NR8)
Product Description:
The 1746-NR8 module is a networking component within the Allen-Bradley ControlLogix 5000 programmable automation controller (PAC) system. It provides network redundancy capabilities for the ControlLogix system, enhancing communication reliability and system uptime.
Product Function:
The 1746-NR8 module operates in pairs to create a redundant communication path between ControlLogix controllers or other network devices. Here’s how it works:
- Dual Network Connections: Each NR8 module connects to two separate Ethernet networks. This allows for a backup communication path in case of a failure on the primary network.
- Automatic Failover: If the primary network experiences an issue, the NR8 modules automatically switch communication to the secondary network, minimizing downtime and ensuring data transmission continues.
- Ring Network Topology: The NR8 modules can be configured in a ring topology, where each module connects to two others, forming a closed loop. This provides redundancy even if a single network cable or switch fails within the ring.
Product Parameters and Specifications (Refer to Rockwell Automation website or datasheet for details):
Exact specifications may vary depending on the specific revision of the 1746-NR8 module. However, some typical parameters might include:
- Supported Network Speeds: The Ethernet network speeds supported by the module (e.g., 100 Mbps, 1 Gbps).
- Number of Network Ports: The number of Ethernet ports available on each NR8 module (typically 2).
- Media Access Control (MAC) Address Management: The module manages MAC addresses for the redundant network connections.
- Configuration and Diagnostics: The NR8 module can be configured and monitored using Rockwell Automation software tools.
Finding More Information:
- Rockwell Automation Website: Search for “1746-NR8” on the Rockwell Automation website ([invalid URL removed]) for the product manual, datasheets, and compatibility information.
- Authorized Distributors: You can purchase the 1746-NR8 module or find more information from authorized Rockwell Automation distributors.
Additional Considerations:
- System Integration: The 1746-NR8 module is a component within a larger ControlLogix system. You’ll need additional hardware like ControlLogix controllers, network switches, and Ethernet cables for a complete redundant network solution.
- Network Design: Planning and configuration of the redundant network topology using the NR8 modules is crucial for optimal performance and ensuring seamless failover.
By using these suggestions and referring to the resources from Rockwell Automation, you can gain a comprehensive understanding of the 1746-NR8 network redundancy module’s functionalities and specifications within an Allen-Bradley
