Field Bus Baud Rate And Field Bus Length - Festo CPV -GE-DN2-8 Electronic Manual

1. Installation

1.3.2 Field bus baud rate and field bus length

Festo P.BE-CP-DN2-EN en 0107NH
The maximum permitted field bus length depends on the
baud rate used. Fig. 1/11 shows the guideline values.
Detailed information can be found in the manuals for your
control system or scanner.
The maximum permitted length of the branch line depends on
the total length of the branch lines and the baud rate.
Please note
S Refer to the manuals for your control system or bus in-
terface for information on the T-adapter and the maxi-
mum branch line length which is permitted for your con-
troller.
S When ascertaining the maximum permitted length of the
field bus cable, take into account also the sum of the
branch line lengths.
Baud rate Maximum main
bus length b l th
125 kBaud 500 m
250 kBaud 250 m
500 kBaud 100 m
Fig. 1/11: Maximum field bus length and branch line length
as a factor of the baud rate (as per ODVA specifica-
tion V 2.0)
Information on setting the baud rate can be found in chapter
1.2.2.
Branch line length
maximum cumulative
156 m
6 m 6
78 m
39 m
1-15