Festo Контроллеры двигателя SFC-LAC - Manual (Page 73)

3. Installation
3−21
Festo GDCP−SFC−LACI−CO−EN en 0812NH
3.7.3 Bus power supply
Bus supply With external power supply to the fieldbus node of the
SFC−LACI avoid excessive distances between the bus power
supply and the SFC−LACI.
Caution
· When connecting the fieldbus interface and the power
supply for the bus interface pay attention to the polarity.
· Connect the screen.
· With external voltage supply (see Tab. 3/8): Protect the
power supply for the bus interface with an external fuse,
in accordance with the number of bus slaves.
Note
Bus slaves have different tolerances in respect of the interĆ
face supply, depending on the manufacturer. Observe this
when planning the bus length and placing the power supĆ
ply unit.
For the SFC−LACI, the following tolerance applies to the bus
interface supply (pin 9 on the Sub−D plug):
V
max
= 30.0 V
V
min
= 11.0 V
Recommendation:
Place the power supply unit approximately at the centre of
the bus.