Profibus Actuator Control Profibus DP Option Card Installation Manual
Profibus Actuator Control Profibus DP Option Card Installation Manual
Profibus Actuator Control Profibus DP Option Card Installation Manual
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<strong>Profibus</strong> <strong>DP</strong> Mk2 <strong>Option</strong> <strong>Card</strong> <strong>Installation</strong> <strong>Manual</strong><br />
4.2 Segmented Single Highway System<br />
Bus Master<br />
Segment 1<br />
Terminator<br />
Repeater<br />
Segment 2<br />
Powered<br />
Active<br />
Terminator<br />
Segment 3<br />
Repeater<br />
Fig 8: <strong>Profibus</strong> Single Channel Data Highway Topology<br />
The data highway may be connected as several segments coupled by repeaters. The repeaters or<br />
actuator slaves will require termination components if they are on the end of the segment. Alternately<br />
separately powered active termination devices can be used so that when the actuator is switched off<br />
the bus performance is not affected.<br />
Maximum number of devices participating<br />
in the exchange of data<br />
Maximum number of devices per segment<br />
including repeaters<br />
Maximum number of segments in series<br />
127 (addresses from 0 to 126, 0 is usually the PLC)<br />
32<br />
EN50170 specifies a maximum of 4 repeaters between<br />
any two devices. Some manufacturers of repeaters<br />
allow more than this number.<br />
16 of 66 Publication S420E V3.0 Issue 01/05