Technical support
：
P3
3
Terminating Resistors
In order to minimize the reflection effect of the signal transmission,
PROFIBUS device has to fit with an active terminal resistor at both first
node and last node. The connection of active terminating resistors is
shown in above circuit diagram. The PROFI-25xx module doesn
’t have
any terminating resistors inside. Therefore, users must add the
terminator in external. In general, PROFIBUS connector has terminating
resistors inside, and there is a switch to control the ON/OFF of the
terminating resistors, as shown below.
4
Dip Switch
Users can set dip switch to get a
better PROFIBUS signal quality in
PROFI-2542(SC) module.
Terminator Switch
Terminator OFF
Terminator ON
