SMAR RHP303, Руководство пользователя, Страница: 6 / 16

RHP303 –Profibus Hub Repeater
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Figure 3 – Expansion of Profibus DP networks
The RHP303 increases the network availability by filtering EMI noises so that one channel does not
interfere with the other or with the main trunk.
Figure 4 – Insulation between areas
PROFIBUS DP cable lengths
See on the table below the relation between the several communication rates and the allowed
lengths. Make sure the cables on the main channel (A) and the derived channels (B to F) comply
with the PROFIBUS DP cable specifications for the RS-485.
Baud rate (kbps) 9.6 19.2 45.45 93.75 187.5 500 1500 3000 6000 12000
Segment length (m) 1200 1200 1200 1200 1000 400 200 100 100 100
Segment length (feet) 3940 3940 3940 3940 3280 1310 656 328 328 328