IFM Ecomat 300 AC1307, Основное руководство устройства

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6BElectrical connection
35BThe AS-i power supply
7-3
7.2 The AS-i power supply
To operate an AS-i system a special AS-i power supply is required, e.g. AC1216
from
ifm electronic
. The AS-i power supply supplies the connected slaves with
energy via the yellow AS-i cable and at the same time implements data decoupling
from the voltage regulator of the power supply. Standard switched-mode power
supplies do not feature data decoupling and are therefore not suited for use as
AS-i current supply.
In the
ifm
AS-i power supplies the two terminals AS-i+ and AS-i- are designed re-
dundantly, so that they can additionally be connected to the terminals ASI 1+ and
ASI 1- of the controllere without additional terminals. The same applies to ASI 2+
and ASI 2- for the second AS-i master circuit.
For the operation of the optional second AS-i master a second AS-i power supply is
required, because the two master circuits must be electrically separated. In addi-
tion, the AS-i power supply supplies the analogue input part of the controllere.
CAUTION
Overcurrent in case of short circuit
Risk of damage to units. In case of short circuits, the AS-i power supply provides
the maximum current.
►
Disconnect the power supply from power before connecting the controllere.
CAUTION
Asymmetry of the AS-i signals
Interference or corruption of the AS-i signals.
When the AS-i network is grounded the signals AS-i+ and AS-i are no longer
symmetrical to the ground potential of the machine/plant.
|
Do NOT ground the AS-i network.
► Connect the "Shield" terminal on the AS-i power supply to the machine ground
so that it is well conductive (GND potential).