Allen Bradley 1756-CN2RXT ControlLogix Communication Module

FAQ

Q1: What is the 1756‑CN2RXT used for?
It is a redundant ControlNet communication interface module for ControlLogix systems, designed for high‑speed deterministic networking with redundancy support.

Q2: What network protocol does this module support?
It supports the ControlNet industrial protocol at up to 5 Mb/s transmission speed.

Q3: How many ControlNet ports are available?
It has two BNC ports that provide redundant ControlNet connections.

Q4: How many Logix connections can it handle?
It supports up to 128 Logix communication connections.

Q5: What type of cable does the 1756‑CN2RXT use for ControlNet networks?
It uses 1786‑RG6 quad‑shield coaxial cable for ControlNet communication.

Q6: What is the backplane current draw for this module?
The module draws approximately 1300 mA at 5.1 V DC and about 3 mA at 24 V DC from the ControlLogix backplane.

Q7: What are the physical dimensions and weight?
Dimensions are around 18.3 × 5.2 × 23.4 cm and weight is approximately 0.30 kg.

Q8: Is the 1756‑CN2RXT still supported by Rockwell Automation?
Yes — it is an active communication module within the ControlLogix product family.

1756-CN2RXT Allen Bradley

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