Introduction

The NAE55 is a specific series of network engine

that performs a key role in the Metasys system

architecture. Network engines provide network

management and system-wide control and

coordination over one or more networks of Metasys

equipment controllers, including the following:

• General Purpose Application MS/TP Controllers (CGMs)

• VAV Box Equipment MS/TP Controllers (CVMs)

• Field Equipment Controllers (FECs) and Advanced

Application Field Equipment Controllers (FACs)

• Terminal Equipment Controllers (TECs)

• LN (LonWorks® Network) series equipment controllers

• Legacy Metasys controllers, such as Unitary

(UNT) controllers, Variable Air Volume Assembly

(VMA14xx) controllers, and DX-9100 controllers

• Third-party equipment controllers

Network engines can be networked together

for scaling up on large projects, and they can be

networked with an Application and Data Server

(ADS), an Extended Application and Data Server

(ADX), or an Open Application Server (OAS) for

additional functionality and site unification.