Figure 4-9 Multiple Tap Connections In Close Proximity; Figure 4-10 Spacing Between Taps - Siemens SIMATIC TI555 System Manual

TI545/TI555 System Manual
Where several connections need to be made close together, it is better to
place a single terminal block in the trunk line and connect all nearby
equipment to that terminal block (Figure 4-9).
Make multiple connections like this...
Remote
Base
Remote
T
Base
Remote
Base
... but not like this.
Remote
Base

Figure 4-9 Multiple Tap Connections in Close Proximity

Tap connections on the trunk line should be spaced, on average, so that
the total length of trunk cable separating several taps is greater than
the sum of the total length of drop cables connected at the taps
(Figure 4-10).
T
L
1
Remote
Base

Figure 4-10 Spacing between Taps

... or this...
T T
Remote Remote
Base Base
L
3
)
L > (L + L
3 1 2
Cabling and Wiring the System
T
Remote
Base
Remote
Base
Remote
Base
T
T
L
2
Remote
Base
4-15