Table 12: Maximum number of devices per LonWorks network segment
Device Type
Maximum Allowed
Bus Topology
Two bus type EOL terminators required (NU-
EOL202-0)
Free Topology
One free topology terminator required (NU-
EOL203-0)
Notes:
• Each NPT10/11 channel segment (between repeaters) requires its own power supply. Other
factors, such as power consumption of individual LPT10/11 devices, may limit a segment to fewer
devices.
• The MS-NAE552x-x models that support LonWorks Network trunks do not have an internal
network terminator.
Table 13: NAE55 with integrations dual trunk options
Trunk Type
Supported Dual Trunk Application
Modbus
• 2 RS485 or
• 2 TCP or
• 1 RS232 + 1 RS485 or
• 1 RS232 + 1 TCP or
• 1 RS485 + 1 TCP
M-Bus
• 2 RS485 or
• 2 TCP or
• 1 RS232 + 1 RS485 or
• 1 RS232 + 1 TCP or
• 1 RS485 + 1 TCP
Modbus and M-Bus
• 1 RS485 1 RS485 M-Bus or
• 1 TCP 1 TCP M-Bus or
• 1 RS232 1 RS485 M-Bus or
• 1 RS485 1 RS232 M-Bus or
• 1 TCP 1 RS232 M-Bus or
• 1 TCP 1 RS485 M-Bus or
• 1 RS232 1 TCP M-Bus or
• 1 RS485 1 TCP M-Bus
KNX
• 1 KNX (routing mode) or
• 3 KNX (tunneling mode)
27
NAE55/NIE55 Installation Guide