Johnson Controls NAE55 Series, Installation Instructions Manual

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Table 3: Guidelines for N2 Network Topology
Rules/Maximums Allowed Category
Solid or stranded 1.5 mm (18 AWG) 3-wire is recommended.
Solid or stranded 0.6 mm (24 AWG) larger 3-wire or 4-wire (two twisted-pairs) is acceptable.
Note: The + and - bus leads should be a twisted pair. On applications using 4-wire (two twisted-pairs)
cable, isolate and insulate unused conductor.
Cable
Preferred Termination Configuration : Two N2 devices with EOL switches in the ON position, one at
each end of each N2 Bus segment
Minimally Required Termination Configuration : At least one N2 device with an EOL switch in the ON
position somewhere on each N2 Bus segment
Terminations
Table 4: Guidelines for L
ON
W
ORKS
Network Bus Topology
Maximum Segment Length with
FTT10 and/or LPT10/11 Devices Maximum Segment Length with
FTT10 Devices Only Cable Type
2,200 m (7,200 ft) 2,700 m (8,850 ft) Belden ® 85102 Cable
2,200 m (7,200 ft) 2,700 m (8,850 ft) Belden 8471 Cable
1,150 m (3,770 ft) 1,400 m (4,600 ft) Level IV 22 AWG
750 m (2,460 ft) 900 m (2,950 ft) JY (St.) Y 2 x 2 x 0.8
1 For the bus topology, the maximum length stub cable is 3 m (10 ft), and the stub lengths must be calculated into the overall
segment length.
Table 5: Guidelines for L
ON
W orks Network Free Topology
Maximum Segment Length with
FTT10 and/or LPT10/11 Devices Maximum Node-to-Node Distance Cable Type
500 m (1,640 ft) 500 m (1,640 ft) Belden 85102 Cable
500 m (1,640 ft) 500 m (1,640 ft) Belden 8471 Cable
500 m (1,640 ft) 400 m (1,300 ft) Level IV 22 AWG
500 m (1,640 ft) 320 m (1,050 ft) JY (St.) Y 2 x 2 x 0.8
Table 6: Maximum Number of Devices per L
ON
W
ORKS
Network Segment
Maximum Allowed Device Type
64 nodes if repeaters are not used; 255 nodes if repeaters are
used FTT10 Nodes Only
([FTT10 x 2] + LPT10/11) < 128
Mixed FTT10 and LPT-10/11 Nodes
1
Maximum of 1 per segment Physical Layer Repeaters
Terminators
2
2 bus type EOL terminators required (NU-EOL202-0) Bus Topology
1 free topology terminator required (NU-EOL203-0) Free Topology
1 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.
2 The MS-NAE552x-x models that support L
ON
W
ORKS
Network trunks do not have an internal network terminator.
8 NAE55/NIE55 Installation Instructions