S2N2E N2 to Ethernet Gateway




The S2N2E Gateway is a Communication Bridge between a local Johnson Controls’ Metasys N2 Communication Bus (N2 Bus) and multiple remotely connected N2 Buses and N2 Compatible field devices.  These multiple N2 Buses/Devices can be located across the city, country, or even the World providing that they have access to a TCP/IP Ethernet connection (i.e. Corporate Intranet, Internet, etc).
S2N2E Topology



The S2N2E bridges the Ethernet connection transparently to both the NCM/NAE and the remote N2 devices.  Two S2N2E devices are required (minimum configuration) where one device (local) acts as a N2 slave/Ethernet Master and the other (remote) an Ethernet Slave/N2 Master.  The total link is transparent to the Metasys Operating Software, the local NCM/NAE, and the remotely connected N2 devices.  Thus, remote N2 devices can be monitored and controlled by Metasys/NCM as if they were locally connected.
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Part Number:

  • S2N2E-18VAC (12-18 VAC Version)
  • S2N2E-24VAC (24 VAC Version)

Power Requirements:

  • 12 - 18 V AC/DC 60 Hz @ 400 mA Smart Sense
  • 18 - 24 V AC/DC 60 Hz @ 400 mA Smart Sense


  • Temperature 0 C to +60 C
  • Humidity: 10 - 95 % RH (non-condensing)


  • 7.44”L x 3.94”W x 1.75” H
  • 18.9cm L x 10.0cm W x 4.4cm H

N2 Protocol Support:

  • Max N2 Devices:


  • Max N2 Objects:  

-100 AIs, 100 AOs,

-100 BIs,100 BOs,
-256 Floats, 256 Integers,
-100 Bytes

Supported N2 Devices:  

  • DX9100 incl XP Modules
  • AHU
  • UNT
  • VAV
  • VND
  • Other devices pending


Mounting Options:
  • DIN Rail