Allen-Bradley 1756-CNB - Redundant Components and Design Considerations

Publication 1756-UM523F-EN-P - December 2006
Design the System 33
Additional Redundant
Components
In addition to using redundant pairs of controllers, you may also add
these redundant components to your system:
• Redundant ControlNet Media
• Redundant Power Supplies
Redundant ControlNet Media
Redundant ControlNet media prevents a loss of communication if a
trunkline or tap is severed or disconnected. It uses these components:
• 1756-CNBR ControlNet modules
• Two identical ControlNet links
Redundant ControlNet Media Components
ControlLogix Chassis with
1756-CNBR Module
Redundant Media
ControlNet Node
ControlNet Node