1756-CNB vs 1756-CN2

[stylemismatch]

What's the difference between the two?

What's the proper one to use for communicating to a remote i/o rack via controlnet (this is for a Control Logix system).

 

[rdrast]

The CNB is older, slightly cheaper, and supports 40 to 48 connections.
The CN2 is newer, slightly more expensive, and supports 100 connections.

They generally perform equally well, I have both here.