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14.3
Description of signaling
14.3.1 Output voltage
Signals whether the output voltage is in the preset range. If
the output voltage of the power supply falls below the set
threshold value, the signal state changes.
Example of use
Indicates whether the connected load is being supplied.
Used to quickly detect a load circuit that is not being
supplied (e.g.,
in the event of mains failure or short circuit in
the supply line).
14.3.2 Output current
If the output current of the power supply exceeds the set
threshold value, the signal state changes.
Example of use
In the case of system extensions, loads are added. This
increases the utilization of the power supply. Preventive
function monitoring detects critical operating states in good
time. Action can be taken before system downtime occurs.
14.3.3 Output power
If the output power of the power supply exceeds the set
threshold value, the signal state changes.
Example of use
In the case of system extensions, loads are added. This
increases the utilization of the power supply. Preventive
function monitoring detects critical operating states in good
time. Action can be taken before system downtime occurs.
14.3.4 Operating hours
If the preset operating time of the power supply is exceeded,
the signal state changes.
Example of use
For systems with a very long operating time, such
as wind
turbine generators or refineries, maintenance intervals are
planned. You can even schedule the maintenance date
during configuration based on the ambient temperature and
utilization of the power supply.
14.3.5 Early warning of high temperature
Before the power supply protects itself through power
derating in the event of an overtemperature, the signal state
changes.
Example of use
Outdoor control cabinets can reach a high internal
temperature depending on the position of the sun. The same
is true if a control cabinet fan or cooling system fails. In the
event of any form of overtemperature, the power supply
provides a warning by means of this signal, well before the
supply of the loads is in any danger.
Specifications regarding the available output power (see
derating section).
14.3.6 Voltage limitation active
If the circuit inside the device for protecting against surge
voltages is activated at the output, the signal state changes.
Example of use
Normative requirements stipulate that an upper voltage limit
must be observed at the output in the event of an error. It
must therefore be ensured, for
example, that safety-related
controllers are not supplied with an output voltage that
exceeds 32
V
DC, even in the event of an error. If foreign
bodies (ferrules, screws, etc.) enter the power supply and
generate an error, the signal state changes.
14.3.7 Input voltage OK
The power supply signals a mains failure at least 10
ms
before shutting off.
Example of use
In the event of a mains failure, the power supply continues to
supply the load with nominal power for at least 20
ms.
Failure of the input voltage is signaled 10
ms before the
output voltage falls, which means that this information is
provided to the higher-level controller at an early stage.
System states can therefore be stored promptly without any
loss of data as a result of the unexpected failure of the
supply voltage.
