ICP DAS USA ICP CON GW-7557, Руководство пользователя

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Table 4 Transmission rate decreasing with increasing transmission distance
Transmission Rate(kbps) Transmission Distance per Segment (meter)
9.6, 19.2, 45.45,93.75 1200
187.5 1000
500 400
1500 200
3000, 6000, 12000 100
In order to minimize the reflection effect of signal transmission, both ends (first
node and last node) of a PROFIBUS segment needs to be equipped with an
active terminal resistor as shown in
Figure 5
. A standard PROFIBUS connector
is usually already equipped with a terminal resistor. The user therefore only has
to switch on the resistor of the devices stationed at the ends of a segment as
shown in
Figure 6
.
Figure 5 PROFIBUS connection
GW-7557 PROFIBUS/HART Gateway User Manual
(Version 1.00, Dec/2011)
PAGE: 10