The NCE25 models:
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support either one field bus or one LonWorks® network trunk into a Metasys system network, specifically:
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NCE256x-x: one BACnet® MS/TP trunk with up to 32 MS/TP controllers
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NCE251x-x: one N2 Bus with up to 32 N2 controllers
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NCE252x-x: one LonWorks trunk with up to 32 LonWorks devices (Release 9.0 only)
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support up to two vendor integrations, including Modbus, M-Bus, KNX, and C•CURE/victor
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monitor and control up to 100 BACnet IP field devices over Ethernet at the supervisory level
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provide an integral MS/TP Field Equipment Controller with 33 Input/Output (I/O) points
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cannot serve as a Site Director for other engines except for itself
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support Domain Name Server (DNS) for resolving NAE names on the building network, but does not support NETBIOS name resolution