Datasheet

UNO-PS/1AC/24DC/150W
106261_en_02 PHOENIX CONTACT 13
9 Operating behavior of the power
supply unit
9.1 Normal operation
In normal operation, the loads are supplied with a constant
output voltage of 24 V DC.
9.2 Overload response
The power supply operates according to the characteristic
curve shown in the figure. In the event of an overload (I > I
N
),
the device reduces the output voltage. If the output voltage
drops below U
N
x 0.8, the output current is also reduced. In
the event of a higher overload, the power supply constantly
limits the output current to I
N
x 0.5. If the overload is rectified,
the device continues running in nominal operation.
Figure 12 Output characteristic curve
9.3 Behavior at ambient temperatures > 55°C
At an ambient temperature of up to 55 °C, the power supply
unit supplies the nominal output current. At ambient temper-
atures upwards of 55 °C, the output power must be reduced
by 2.5 % per Kelvin temperature increase (temperature-de-
pendent derating).
Figure 13 Temperature-dependent derating
[A]
[V]
UN
UN x 0,8
ININ x 0,5
UN x 0,6
-25
0
I
N
20 40 60
[A]
[°C]