L-Switch User Manual 19 LOYTEC
Version 6.0 LOYTEC electronics GmbH
3 Network Media
3.1 TP-1250
The TP-1250 uses transformers for galvanic isolation. The topology of a TP-1250 network
is a bus. Thus, both ends of the bus cable need to be terminated. LOYTEC recommends
using its L-TERM network terminators for network termination (LT-13). Figure 8 shows an
example.
Figure 8: TP-1250 and FT-10 Network Termination
If the collision-less backbone mode (recommended, default behavior) is disabled, the
L-Switch XP TP-1250 ports are fully compatible to the parameters specified by LONMARK
for this channel (TP/XF-1250). If the collision-less backbone mode is enabled, proprietary
channel parameters are used. In this case no Neuron Chip based nodes or other nodes with
standard TP-1250 communication parameters are permitted on the same channel.
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