Cable Length - Siemens S7-300 Installation Manual

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Table 5-22
PG patch cord
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If bus nodes are connected to a bus segment via stub cables (e.g. PG via a normal
PG cable), then you must consider the maximum possible length of the stub cable.
You can use a PROFIBUS bus cable with bus connector as the stub cable for up to
3 Mbps.
Use the patch cord to connect the PG or PC when operating above 3 Mbps. In your
bus configuration you can use multiple PG patch cords with this order no. Do not
use other types of stub cable.
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You can implement cable lengths of up to 50 m in an MPI subnet segment. This 50
m applies from the first node to the last node in the segment.
Table 5-23
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19.2 Kbps
187.5 Kbps
1.5 Mbps
3.0 Mbps
6.0 Mbps
12.0 Mbps
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PG patch cord
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Permitted cable lengths in an MPI subnet segment
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50 m
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S7-300 Automation System, Hardware and Installation: CPU 312IFM - 318-2 DP
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1,000 m
M 200
M 100
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