Short Description
One Cable – Two Functions
AS-Interface (AS-i) enables maximum control
potential with its simplified installation technique.
Information and power supply are transmitted at the
same time via a two-wire cable to minimize connection
points.
AS-i power supply units use an integrated filter to
ensure that the modulated data flow is not affected.
In addition to this, the short-circuit and idling-proof
voltage output provides a current reserve of
approximately 60%. This means that even loads with
high inrush currents can be started safely.
Safety Through Automatic Ground Fault Detection
If two ground faults occur in an AS-i system, this can
cause an unauthorized machine startup or mean that
the machine can no longer be stopped.
To prevent this from happening, AS-i power supply
units from Phoenix Contact indicate the first ground
fault as it occurs. The message is indicated by the
LEDs on the device and reported via an output.
In the default configuration, the signal of the message
output can be used to stop the system via the control
program or the PLC.
There is also the option of configuring the AS-i power
supply unit so that the AS-i power is switched off
automatically when a ground fault is detected.
This prevents potential danger to operating personnel
and machines/systems before it happens.