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PROFIBUS-DP Bus Adapter
5.4 Relationship between Communication Rate and Cables
Relationship between adapter's communication rate and cable length is descri-
bed in the table below:
Baud rate
9.6 – 93.75 kbps
187.5 kbps
500 kbps
1.5 Mbps
3 – 12 Mbps
Tab. 5-5: Relationship between communication rate and cable length
5.5 EMC Measures
Conductor of bus cable (signal cable) must be twisted, shielded and installed
●
separately with electrical power cable with a distance of at least 20 cm;
Conductors of communication connection cable (signal cable) for adapter
●
and frequency converter must be twisted, shielded and installed separately at
a reasonable distance. Shielding layer for communication cable should be
grounded at one end;
Signal cable and electric power cable should be orthogonal in case of cross-
●
ing;
Signal cable should be as short as possible;
●
Large area is required for the connection of shielding layer.
●
DOK-RCON01-PROFIBUS***-IB04-EN-P
Maximum length for each cable m
(Type A)
1000
1000
400
200
100
Bosch Rexroth AG
Electrical Installations
Maximum length for each cable m
(Type B)
1000
600
200
200
100
19/35
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