User Manual
3. Installation
3−18
Festo GDCP−SFC−LACI−DN−EN en 0812NH
3.7 Connecting the field bus
3.7.1 Field bus cable
Note
Faulty installations or high transmission rates may cause
data transmission errors as a result of signal reflections
and attenuations.
Transmission errors can be caused
by:
missing or incorrect terminating resistor
incorrect screened connection
branches
transmission over long distances
inappropriate cables.
Observe the
cable specifications. For information on the
cable type refer to the manual for your controller or to the
DeviceNet specification.
Note
If the SFC−LACI is installed in a machine on a movable
mounting, the field bus cable must be provided with strain
relief on the moving part of
the machine. Also observe the
relevant regulations in EN60204 part 1.
Use a twisted−pair screened 4−wire cable as the field bus
cable.
If the field bus plug FBS−SUB−9−BU−2x5POL−B is used, a cable
diameter of 5 ... 10 mm is permitted.