Specifications
Table 11: Cable for FC Buses and SA Buses in Order of Preference
Plenum ApplicationsNon-Plenum ApplicationsBus and Cable Type
O.D.Part NumberO.D.Part Number
0.140 in.Anixter: CBL-22/3-FC-PLN
Belden: B6501FE
0.138 in.Anixter:
CBL-22/3-FC-PVC
Belden®: B5501FE
FC Bus: 22 AWG Stranded,
3-Wire Twisted Shielded
Cable
1
0.206 in.Anixter: CBL-22/2P-SA-PLN
Belden: B6541FE
0.209 in.Anixter:
CBL-22/2P-SA-PVC
Belden: B5541FE
SA Bus (Terminal Block):
22 AWG Stranded, 4-Wire,
2 Twisted-Pair Shielded
Cable
1
0.15 in.Anixter preassembled:
CBL-NETWORK25
CBL-NETWORK50
CBL-NETWORK75
CBL-NETWORK100
——SA Bus (Modular Jack):
26 AWG Solid 6-Wire,
3 Twisted-Pair Cable
2
0.131 in.Belden: B6501UE0.135 in.Belden: B5501UEFC Bus: 22 AWG Stranded,
3-Wire Twisted Non-Shielded
Cable
0.199 in.Belden: B6541UE0.206 in.Belden: B5541UESA Bus (Terminal Block):
22 AWG Stranded, 4-Wire,
2 Twisted-Pair Non-Shielded
Cable
1 We strongly recommend 3-wire (for FC Bus) and 4-wire, 2 twisted-pair (for SA Bus), 22 AWG stranded, shielded cable. A 22
gauge cable offers the best performance for various baud rates, cable distances, and number of trunk devices primarily due
to lower conductor-to-conductor capacitance. Shielded cable offers better overall electrical noise immunity than non-shielded
cable. Observe the shield grounding requirements.
2 We recommend 26 AWG solid, 6-wire (3 twisted pairs) cable as the best fit for fabricating modular cables with the modular
jack housing assembly. Be sure the cable you use fits the modular jack housing. The preassembled cables that are available
from Anixter (Part No. CBL-NETWORKxxx) use 24 gauge wire.
Table 12: FC Bus Wire Gauge and FC Bus Baud Rate
Baud RateMaximum Cable Length and
Node Connections Limit
AWG Wire
Gauge
76,800
3
38,400
2
19,200
1
9600
1
305
(1,000)
(NR)
609
(2,000)
(NR)
1,219
(4,000)
(NR)
1,219
(4,000)
(NR)
1,524 (5,000)
(APR)
1,524 (5,000)
(APR)
Maximum Cable Length per
Bus Segment (m [ft])
18
50/100
(NR)
10/30
(NR)
50/100
(NR)
40/100
(NR)
50/50
(APR)
25/25
(APR)
Maximum Number of Nodes
(per Segment / per FC Bus)
1,219
(4,000)
(NR)
1,524
(5,000)
(NR)
1,524 (5,000)
(APR)
1,524 (5,000)
(APR)
1,524 (5,000)
(APR)
Maximum Cable Length per
Bus Segment (m [ft])
20
50/100
(NR)
40/100
(NR)
50/100
(APR)
50/50
(APR)
25/25
(APR)
Maximum Number of Nodes
(per Segment / per FC Bus)
35MS/TP Communications Bus Technical Bulletin