Metronix ARS 2320, Руководство по эксплуатации продукта

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Technology modules Page 160
Product Manual „Servo drives ARS 2320, ARS 2340, ARS 2320W, ARS 2360W“ Version 8.0
11.2.4 Termination and bus terminating resistors
Every bus segment of a PROFIBUS network has to be equipped with bus terminating resistors to
minimise line reflections and to adjust a defined rest potential on the line. The bus termination has to
be provided at the
beginning
and at the
end of every bus segment
.
Most PROFIBUS connectors come supplied with integrated terminating resistors. For bus connections
with connectors without integrated terminating resistors, the PROFIBUS-DP interface has its own
terminating resistors. They can be activated with the help of the
two DIP switches
on the module
(switch set to ON).
To ensure safe operation of the network,
only one bus termination may be used at a time
.
The external connection can also be set up discretely (see
Figure 47
). The power supply of 5 V
required for the externally connected terminating resistors is supplied at the PROFIBUS connector of
the PROFIBUS-DP interface (see pin assignment in
Table 55
).
GND 5 V
+5 V
A-Line
B-Line
390 Ohm
220 Ohm
390 Ohm
Figure 47: PROFIBUS-DP interface: Connection with external terminating resistors