Determining Signal Losses - Siemens SIMATIC TI505 User Manual

Redundant I/O System (continued)
Determining Signal
Losses
1-4
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The installation of the Redundant I/O system requires dual cables and a
dual tap/splitter arrangement as shown in Figure 1-2. In developing the
power budget, you must include the dual tap and splitter losses. Table 1-1
lists typical losses obtained when using taps and splitters. See Figure 1-2
for location of the losses.
IL
To
Active
Tap 1
TI560/TI565
TL
TL
SL
IL – Insertion Loss
TL – Tap Loss
SL – Splitter Loss
Recommended tap values: 7.0 dB (insertion loss of 2.7 dB)
Figure 1-2 Dual Tap-splitter Arrangement for each I/O Channel
Splitter Splitter
1
SL SL
Trunk A Trunk B
SIMATIC TI505 Redundant I/O System User Manual
IL
To
Stand-by
Tap 2
TI560/TI565
TL
TL
2
SL
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