Allen Bradley 1756-CN2R ControlLogix Communication Module

FAQ

Q1: What is the 1756‑CN2R used for?
It is a ControlLogix communication module that provides redundant high‑speed ControlNet connectivity in industrial automation systems.

Q2: Which network protocol does the 1756‑CN2R support?
It supports the ControlNet protocol at up to 5 Mb/s for deterministic networking.

Q3: How many ControlNet ports does this module have?
It has two ControlNet BNC ports for redundant network connections.

Q4: How many Logix communication connections are supported?
It supports up to 128 Logix connections.

Q5: What type of cable is used for ControlNet?
It uses 1786‑RG6 quad‑shield coaxial cable for reliable physical network connection.

Q6: What are its environmental operating conditions?
The module operates from 0 °C to 60 °C with relative humidity up to 95 % non‑condensing.

Q7: What are the physical size and weight of the 1756‑CN2R?
The dimensions are approximately 18.3 × 5.2 × 23.4 cm and it weighs about 0.29 kg.

Q8: Is the 1756‑CN2R still supported by Rockwell Automation?
Yes — it is listed as an active, mature communication module in the ControlLogix product family.

1756-CN2R Allen Bradley

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