The Allen-Bradley 1756-CNB or ControlNet Bridge module is an interface module used for interfacing a ControlLogix rack to ControlNet network. Compared to the Allen-Bradley 1756-CNBR module, the 1756-CNB is used in standard, non-redundant configuration. This module is perfect if the user applications have 40 to 48 Logix communication connections per communication module. It has a communication rate of 5 megabytes per second and it has 99 nodes available. The 1756-CNB module handles 2 things, namely the control of I/O data when it is used with a Logix5550 controller for scheduled data and for unscheduled data, bridging data between the ControlLogix backplane and the ControlNet Network. Make sure that the path information is correct in order to properly route the messages it receives.
ManufacturerRockwell Automation
BrandAllen-Bradley
Part Number/Catalog No.1756-CNB
SeriesControlLogix
Module TypeBridge Module
Maximum Nodes99
Maximum Connections64
ControlNet Communication Rate5 megabits-second
ConfigurationStandard
Input Current970 milliamps at 5.1 Volts DC, 1.7 milliamps at 24 Volts DC
Thermal Dissipation17.4 BTU per Hour
Power Dissipation5.1 Watts
Slot width1
UPC10612598174079
Weight0.57 pounds (0.26 kilograms)
1756-CNBR
Redundant Bridge Module, 5.1 Watts, 5 Mbps, 40-48 Logix Communication Connections
1756-CNBRK
Redundant Bridge Module, 5.1 Watts, 5 Mbps, 40-48 Logix Communication Connections