Table 6: Maximum number of devices per LonWorks network segment (Release 9.0 only)
Device Type
Maximum Allowed
FTT-10 Nodes
Only
64 (if repeaters are not used), 127 (if repeaters are used)
Mixed FTT-10 and
LPT-10 Nodes
1
([FTT10 x 2] + LPT10) < 128
Terminators:
Bus Topology
2 bus type EOL terminators required (NU-EOL202-0)
Free Topology
1 free topology terminator required (NU-EOL203-0)
Physical Layer
Repeaters
Maximum of 1 per segment
1
Each LPT10 channel segment (between repeaters) requires its own power supply. Other factors, such as power
consumption of individual LPT10 devices, may limit a segment to fewer devices. The MS-NAE352x-x an MS-NAE452x-x
models that support a LonWorks Network trunk do not have an internal network terminator.
Table 7: Ethernet network rules
Category
Rules/Maximums Allowed
1
General
Point-to-point star topology with network hubs/switches
Number of
Devices
Maximum of 100 supervisory devices may be connected to one site in the
Metasys
system.
2,000 m (6,600 ft) for plastic/glass fiber optic with external adapter
Line Length and
Type
100 m (330 ft) CAT5 cable
Terminations
For 10/100 BaseT, no line terminators allowed
1
Refer to the
N1 Ethernet/IP Network Technical Bulletin (LIT-6360175)
for recommended parts and part numbers.
17
NAE35/NAE45 Installation Guide
