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1. Installation
1.3
Connecting the field bus
1.3.1 Field bus cable
Bus length
Festo P.BE−CPX−FB23−EN en 0308NH
Please note
With incorrect installation and high transmission rates,
faults in data transmission my occur due to signal reflec
tions and attenuations.
The causes of transmission faults can be:
missing or incorrect terminating resistor
incorrect screening/shield connection
branches
transmission over long distances
unsuitable cables.
Observe the cable specifications. Refer to your controller
manual for information on the type of cable to be used.
Please note
If the valve terminal is fitted into a moving part of a ma
chine, the field bus cable on the moving part must be pro
vided with strain relief. Note also the relevant specifica
tions in EN 60204 part 1.
Exact details on the bus length can be found in section 1.3.2
and in the manuals for your control system.
1−19
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