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GW-7553-CPM PROFIBUS/CANopen GATEWAY User Manual
(Version 1.00, Apr/2016)
PAGE: 10
In order to minimize the reflection effect of signal transmission, both ends (first
node and last node) of a PROFIBUS segment needs to be equipped with an
active terminal resistor as shown in figure6. A standard PROFIBUS connector is
usually already equipped with a terminal resistor. The user therefore only has to
switch on the resistor of the devices stationed at the ends of a segment as shown
in figure5.
Figure 5 PROFIBUS connection
Figure 6 PROFIBUS connector
The number of stations in a PROFIBUS network is restricted to 126. According
Terminator Switch
Terminator OFF
Terminator ON
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