YOKOGAWA F3LR02-0N, User Manual

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B3-11
IM 34M06H45-01E 7th Edition : Aug.30, 2019-00
B3.7 Total Distance
The maximum total distance for a fiber-optic cable is determined by the number of
substations. Table B3.2 shows the mapping between the number of substations and the
maximum total distance.
Do not lay cables such that the actual fiber-optic cable length exceeds the maximum
total distance, or the distance between two stations exceeds the maximum distance
allowed between stations (500 m).
Table B3.2 Mapping Between Number of Substations and Maximum Total Fiber-optic Cable
Extension
Number of
Substations
Maximum Total Distance (m) Number of
Substations
Maximum Total Distance (m)
Daisy Chain Loop Daisy Chain or Loop
1 500 1000 17 880
2 1000 1500 18 840
3 1420 19 800
4 1380 20 760
5 1340 21 730
6 1300 22 690
7 1260 23 650
8 1230 24 610
9 1190 25 570
10 1150 26 530
11 1110 27 500
12 1070 28 460
13 1030 29 420
14 1000 30 380
15 960 31 340
16 920 32 300
The maximum total distance refers to the length of fiber-optic cable from the master
station to the terminal station in a daisy chain configuration, or the length of fiber-optic
cable in a complete loop of a loop configuration (see figure below). The maximum
allowable distance between two stations is 500 m.

Daisy chain Configuration
Master station
max 500m
Substation 1 Terminal station
Maximum total distance
FB0371.VSD

Loop Configuration
Master station Substation 1
Substation n-1
Substation n
Maximum total distance
FB0372.VSD