
6-25
Cabling and Wiring the System
SIMATIC 545/555/575 System Manual
Siemens PROFIBUS-DP connectors have selectable termination and bias
built in. The connectors designed to handle baud rates from 9600 baud to
12 Mbaud (see Table 6-4) have an external switch: see Figure 6-14. The low
baud-rate connectors (9600 baud to 1.5 Mbaud; Table 6-5) have an internal
switch: see Figure 6-15. In both cases, you set the selection switch to the On
position to enable termination and bias, or Off to disable termination and
bias.
9-pin
D-connector
External
Termination
Switch
ON
OFF
Figure 6-14 Preferred Connector, External Termination Switch
Connector InteriorConnector Housing
ON/1 OFF/0
BA BA
Internal Termination Switch
Figure 6-15 Low Baud-Rate Connector, Internal Termination Switch
Using a Termination
Selection Switch
Kommentare zu diesen Handbüchern