Facility Explorer FX15 - N2 Open Card Specifications; LONWORKS Connection Specifications

FX15 Controller Technical Bulletin
55
N2 Open Card
Table 22: N2 Open Card
RS-485 line
Maximum length without repeater: 1,200 m (4,000 ft), AWG26 twisted pair with
shield.
Devices
Maximum of 32 per 1,200 m (4,000 ft) bus segment.
RS-485/232 Converter
IU-9100 if a third-party converter is used then make sure it supports automatic
DSC (Data Send Control)
Electrical Isolation
1,500 V
LONWORKS Connection
Table 23: LONWORKS Connection
LONWORKS network and Line
Terminators
Daisy chained Bus Topology: two terminators of 100 ohm required, one at
each end of the bus.
Free (start) topology: single terminator of 50 ohm required.
Nodes
64 (if repeaters are not used),
FTT-10 nodes only.
Cable type:
Length with FTT-10 devices
Bus Topology
Free Topology
Belden® 85102
2,700 m (1.7 mi)
500 m (0.3 mi)
Belden 8471
2,700 m (1.7 mi)
500 m (0.3 mi)
Level IV 22 AWG
1,400 m (0.9 mi)
400 m (0.3 mi)