N2 Overview

N2, sometimes referred to as "N2 Open" was developed by Johnson Controls as a network to interface their various devices and controllers. It is defined around the RS-485 set of data communications standards and runs at 9600 baud, 8 data bits, and no parity and in half-duplex mode. This network supports communications with a diverse range of devices manufactured by Johnson Controls and other companies. Though initially not a standard, "open" protocol Johnson Controls, Inc. eventually made it open and available to the public. Johnson Controls is the only company to use N2 bus as their standard network protocol. Because it is open and still prevalent within the industry, N2 is a standard offering for OEMCtrl translators and programmable controllers.