PROFIBUS-DP Slave Protocol Manual Ramsey Micro-Tech™ 3000 ...
PROFIBUS-DP Slave Protocol Manual Ramsey Micro-Tech™ 3000 ...
PROFIBUS-DP Slave Protocol Manual Ramsey Micro-Tech™ 3000 ...
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Profibus-<strong>DP</strong> Model 3102<br />
2-2<br />
2. When electrically isolated bus segments are required, or<br />
3. When the maximum cable length of a segment (standard LAN cable)<br />
is exceeded (see Table 2-1).<br />
TABLE 2-1<br />
MAXIMUM CABLE LENGTH OF A SEGMENT (STANDARD LAN CABLE)<br />
Transmission Rate<br />
9.6 to 93.75 Kbps<br />
187.50 Kbps<br />
500.00 Kbps<br />
1.50 Mbps<br />
3.0 to 12.00 Mbps<br />
Maximum Cable Length of a<br />
Segment (in m)<br />
1000<br />
Rules<br />
If you want to install the bus with RS 485 repeaters, the following rules apply:<br />
1. A maximum of 9 RS 485 repeaters can be connected in series.<br />
2. The maximum cable length between two nodes must not exceed the<br />
values in Table 2-2.<br />
TABLE 2-2<br />
MAXIMUM CABLE LENGTH BETWEEN TWO NODES (STANDARD LAN<br />
CABLES)<br />
9.6 to 93.75 Kbps<br />
187.50 Kbps<br />
500.00 Kbps<br />
1.50 Mbps<br />
3.0 to 12.00 Mbps<br />
Transmission Rate<br />
2.3 Profibus-<strong>DP</strong> Connector<br />
800<br />
400<br />
200<br />
100<br />
Maximum Cable Length Between<br />
Two Nodes (in m) With RS 485<br />
Repeaters<br />
10000<br />
8000<br />
4000<br />
2000<br />
1000<br />
The bus connector should be rated for 12 Mbaud and contain a termination<br />
resistor that can be switched on or off. Siemens bus connector 6ES7 972-OBA20-<br />
OXAO is available from Thermo <strong>Ramsey</strong>, part number 057416.<br />
REC XXXXX
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