Festo CTEU-DN Description, Functions And Maintenance page 37

2. Installation and interfaces
Max. data rate (baud rate)
dependent on the line length (reference values)
Main bus Branch line
line (Drop line)
(Trunk line)
Individual branch line
Max. 100 m
Max. 250 m
Max. 500 m
Tab. 2/8: Maximum data rate (baud rate)
Festo P.BE-CTEU-DN-OP+MAINT-EN en 1206NH
2. Set the baud rate: when setting the baud rate, take into
account the length of the network lines (main bus line,
branch lines and branches)
Note
Maximum effective data rate (baud rate)
The setting of the baud rate depends on the length of all
fieldbus connecting cables (network lines).
Consider the length of the fieldbus line between the PLC
•
and bus node (main bus line) as well as the length of any
existing branch lines and branches for continued field-
bus configuration.
Also consider the overall length (sum) of all branch lines.
•
The table below contains reference values for the max-
•
imum baud rate, depending on the line lengths. The
baud rates named here are not supported by all control-
lers.
Observe any deviating specifications in the manual of
•
your control system or network scanner.
Further information can be found in the specifications of
•
the ODVA www.odva.org.
All branch lines (total)
Max. 6 m
Max. 6 m
Max. 6 m
see note below.
Baud rate
Max. 39 m 500 kBaud
Max. 78 m 250 kBaud
Max. 156 m 125 kBaud
2-15