ifm
Basic Device Manual AS-i ControllerE M4 Target V15
2015-10-30
Electrical connection
The AS-i power supply
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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 redundantly, 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 addition, the AS-i power supply supplies the
analogue input part of the controllere.
NOTICE
Overcurrent in case of short circuit!
Risk of damage to devices. In case of short circuits, the AS-i power supply provides the maximum
current.
► Disconnect the power supply before connecting the controllere.
NOTICE
Interference or corruption of the AS-i signals possible.
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 (GND potential)
so that it is well conductive.
