Festo Контроллеры двигателя SFC-LAC - Manual (Page 71)

3. Installation
3−19
Festo GDCP−SFC−LACI−CO−EN en 0812NH
3.7 Connecting the Fieldbus
3.7.1 Fieldbus 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:
Ĉ Missing or incorrect terminating resistor
Ĉ incorrect screening/shield connection
Ĉ Branches
Ĉ Too long or not terminated branch lines
Ĉ Transmission over long distances
Ĉ Unsuitable cables
Observe the cable specifications. For information on the
cable type refer to the manual for your controller or to CIA
specification DS 102.
Note
If the SFC−LACI is installed in a machine on a movable
mounting, the fieldbus cable must be provided with strain
relief on the moving part of the machine. Please also obĆ
serve the relevant regulations in ENĂ60204 part 1.
With external power supply to the fieldbus node, use a
twisted−pair, screened 4−wire cable as the fieldbus cable. With
internal power supply, a twisted 2−wire cable will generally
suffice.Ă
If the fieldbus plug FBS−SUB−9−BU−2x5POL−B is used, a cable
diameter of 5 ... 10 mm is permitted.