Allen-Bradley 1756-CNBR ControlNet Bridge Module Inquiry Item

Details

This Allen-Bradley 1756-CNBR is a redundant ControlNet bridge communication module designed for ControlLogix 1756 PLC chassis. It is equipped with two ControlNet communication ports to support redundant network media, improving network reliability. It realizes data interaction between the ControlLogix backplane and the ControlNet field network, exchanges I/O data, controller tags and messaging information. It supports network node addressing, network scheduling and fault diagnosis. Widely used in redundant industrial control systems, production lines and process automation renovation.

Specifications

Model: 1756-CNBR Brand: Allen-Bradley Series: ControlLogix 1756 Communication: ControlNet Port: Dual redundant ControlNet ports Chassis: 1756 ControlLogix chassis Connection capacity: 40~48 connections Certifications: UL, CSA, CE, C-Tick

Components & Troubleshooting

Network processing chip, dual ControlNet transceiver circuit, backplane connector, status LED indicators, metal insulated housing. Common faults: network communication timeout, port link failure, module fault alarm, node address conflict.

Disclaimer

This spare part shall be installed, configured and commissioned by qualified PLC engineers. Power off the chassis before hot-swap replacement.