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active terminal resistor as shown in figure10. 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 figure11.
Figure 10 PROFIBUS connection
Terminator ON
Terminator OFF
Terminator Switch
Figure 11 PROFIBUS connector
The number of stations in a Profibus network is restricted to 126. According to
the PROFIBUS specification up to 32 stations are allowed per segment. A
repeater has to be used to link the bus segments.
GW-7552-B / GW-7552-M PROFIBUS/MODBUS GATEWAY User Manual (Version 1.60, May/2017) PAGE: 14
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