Allen Bradley 1756-CNBR/D ControlLogix ControlNet Redundant Bridge Module

FAQ

Q1: What is the Allen Bradley 1756-CNBR/D?
A: It is a ControlLogix ControlNet Redundant Bridge Module designed for redundant ControlNet communication.

Q2: What network does the 1756-CNBR/D support?
A: It supports the ControlNet industrial communication network at a transmission rate of 5 Mbps.

Q3: How many ControlNet ports does it have?
A: It has two ControlNet BNC ports for redundant ControlNet media, plus one RJ45 Network Access Port (NAP).

Q4: How many connections can it support?
A: It supports up to 64 total connections, including 40–48 Logix communication connections.

Q5: How many ControlNet nodes are supported?
A: The maximum supported number of ControlNet nodes is 99.

Q6: What is the current consumption?
A: The specified current draw is 970 mA at 5.1 VDC and 1.7 mA at 24 VDC.

Q7: Is the 1756-CNBR/D discontinued?
A: Yes. Rockwell Automation discontinued the 1756-CNBR family on December 31, 2024. The listed engineering replacement is the 1756-CN2R.

Q8: What are the dimensions and weight?
A: The commonly listed dimensions are approximately 145 × 35 × 140 mm, and the manufacturer specifies an approximate weight of 0.293 kg.

1756-CNBR/D Allen Bradley

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