Allen Bradley 1756-CN2 ControlLogix Communication Module

FAQ

Q1: What is the 1756‑CN2 used for?
It is a ControlNet communication interface module for ControlLogix automation systems that enables high‑speed data exchange on a ControlNet network.

Q2: Which network protocol does this module support?
The 1756‑CN2 supports the ControlNet protocol at up to 5 Mb/s for industrial communications.

Q3: How many communication connections can it handle?
It can handle up to 128 Logix network communication connections.

Q4: What type of cable does it require for ControlNet?
It uses 1786‑RG6 quad‑shield coaxial cable for reliable network transmission.

Q5: How much current does the module draw from the backplane?
The module draws approximately 1100 mA at 5.1 V DC and about 3 mA at 24 V DC.

Q6: What environmental conditions can it operate in?
It is rated for operation 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‑CN2?
Dimensions are about 18.3 × 23.5 × 5.4 cm and the weight is approximately 0.50 kg.

Q8: Is the 1756‑CN2 still supported by Rockwell Automation?
Yes — it is listed as an active, mature network communication module within the ControlLogix product line.

1756-CN2 Allen Bradley

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