The NAE55 models:
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support up to two RS485 field buses into a Metasys system network. The NAE551x models integrate two N2 Buses, two BACnet MS/TP trunks, or one N2 Bus and one BACnet MS/TP trunk. Each bus or trunk may contain up to 100 field controllers. The NAE552x models can also integrate a LonWorks network trunk with up to 255 LonWorks devices. NAE55 models can also monitor and supervise a number of BACnet IP devices; the total number of BACnet IP devices depends on the number of objects each device supports.
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support up to two RS485 field buses into a Metasys system. The NIE596x model integrates two N2 Buses, two BACnet MS/TP trunks, or one N2 Bus and one BACnet MS/TP trunk. Each bus or trunk may contain up to 100 field controllers. The NIE592x model integrates a LonWorks network trunk with up to 255 LonWorks devices.
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support up to two vendor integrations, including Modbus, M-Bus, KNX, C•CURE/victor, Zettler,and OPC UA
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supervise BACnet/IP field controllers from Johnson Controls, such as the FAC4911 Advanced Application Field Equipment Controller and the VMA1930 Variable Air Volume Modular Assembly
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serve as a Site Director supervising a maximum of four other network engines, which can be NCE25, NAE35, NAE45, NAE55, SNE, or SNC model engines