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Plant planning
3.4 System limits
Power Line Booster
42
Operating Instructions, 11/2019, A5E36203125A-AG
Summary
The following table once again lists the most important indicators and examples of the
configuration limit:
Table 3- 1
Configuration limits
Plant structure
Reduction in percentage of
maximum configuration
Reduction compared to max-
imum configuration
Maximum number of slaves
per segment
Connection cable
≤
1 m
0%
0 slaves
40 slaves
8 m PLB connection cable
40%
16 slaves
24 slaves
Reduction per connection
cable with individual length
(but ≤ 30
m)
10%
4 slaves
36 slaves
Reduction with separated rail 7% per rail section
2.8 slaves
Depending on the rail sec-
tions
Inlet lifter already with pow-
erline communication (2 rail
se connection cable
with approx. 15 m)
24%
(2 • 7% + 10%)
10 slaves
30 slaves
See also
PLB connection cable (Page 32)
3.4.3
Master position
You must observe two rules to determine the PLB master position.
1.
A maximum of 70% of the slaves permissible for the maximum configuration may be
present between PLB master and rail end. This means that with a PSS application, the
PLB slave farthest removed from a master may be located a maximum of 28 positions
away from the master (40 slaves • 70% = 28 slaves).
2.
A maximum of 40% of the slaves permissible for the maximum configuration may be
present between PLB master and the registration location (rail start). A PLB slave
entering the segment in a PSS application thus may be located a maximum of 16
positions away from the master (40 slaves • 40% = 16 slaves).
In systems where the vehicles only move in one direction during regular operation, the infeed
position of the powerline signal by the PLB master should take place after about one-third of
the travel distance (in vehicle travel direction). This ensures that an adequate signal level is
present over the entire distance in a full segment and that the signal level is strong enough
at the moment of registration. For PDS applications, it must be noted that there are two PLB
slaves on each vehicle.
Also take into account the factors for signal attenuation described in the section "Maximum
number of stations (Page 40)" when positioning the PLB master. The end of the master on
which the signal attenuating factor has an effect is important here. From this end, you must
reduce the number of slaves accordingly.
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