GW-7552-B / GW-7552-M PROFIBUS/MODBUS GATEWAY User Manual
(Version 1.60, May/2017)
PAGE: 14
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
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.
Terminator Switch
Terminator OFF
Terminator ON