YASKAWA PROFIBUS-DP SI-P3 Technical Manual page 23


PROFIBUS-DP Termination
The option does not have a built-in termination resistor. The termination resistance must be set on the final drive in the
network using a switch on the 9-pin D-sub connector. Make sure that only the connector for the final drive in the network
has a termination resistor; communication problems may arise if any other network drive has a termination resistor.
Use only the input side cable entry as shown in
connectors have a function for disconnecting the output side of the cable. Communication will not be possible between
devices if the connector is reversed. Most connectors have arrows indicating the input and output sides.
Figure 19
Termination resistors without inductors as shown in
rates 1.5 Mbps and higher require termination with resistors and inductors as shown in
Figure 20

GSD Files
To facilitate network implementation, obtain a GSD file from one of the following websites depending on your region:
US: http://www.yaskawa.com
Europe: http://www.yaskawa.eu.com
Japan: http://e-mechatronics.com
Other areas: Check the back cover of these manuals.
For questions, contact Yaskawa or a Yaskawa representative.
YASKAWA ELECTRIC SIEP C730600 82D YASKAWA AC Drive Option SI-P3 Technical Manual
Figure 20
Switch
O
Incoming Cable
Figure 20 PROFIBUS Cable Connection with Termination Resistors
Bus termination ON = incoming and outgoing cables not connected.
Bus termination OFF = incoming and outgoing cables connected.
VP (pin 6)
B - Data line
RxD/TxD-P (pin 3)
A - Data line
RxD/TxD-N (pin 8)
DGND (pin 5)
Figure 21 Cable Termination of the Option Cable to EN50170
(Pin Numbers for a 9-pin D-sub Connector)
when connecting both ends of the network. Most 9-pin D-sub
9-pin D-sub Connector
Bus termination
ON
O
O
OFF
Outgoing Cable
Figure 21 can only be used for baud rates below 1.5 Mbps. Baud
390 Ω
220 Ω
390 Ω
5 Installation Procedure
Figure 19.
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