Output

The output provides an SELV/PELV nominal voltage that is electrically isolated from the input voltage.

The output is designed to supply any type of load, including capacitive and inductive loads. If very large capacitors, such as EDLCs (electrical double-layer capacitors or "UltraCaps") with a capacitance > 0.6F are connected to the output, the device can charge the capacitor intermittently.

The output is electronically protected against overload, no-load and short circuit. Noise may be audible in the case of a protective event.

Output

Output voltage

Nom.

DC 24 V

 

Adjustment range

Min.

24 - 28 V

Guaranteed value

Max.

30 V 2)

In end position of the potentiometer, clockwise.

Factory settings

Typ.

24.1 V

±0.2 %, under full load and cold device

Line regulation

Max.

10 mV

180 - 300 Vac

Load regulation

Max.

150 mV

0 A → 20 A, static value, see fig. Output voltage over output current, typ.

Residual ripple and ripple voltage

Max.

100 mVpp

20 Hz to 20 MHz, 50 Ohm

Output current 3)

Nom.

20 A

At 24 V and ambient temperature below 55 °C

Nom.

15.0 A

At 28 V and ambient temperature below 55 °C,

Nom.

17.1 A

At 24 V and an ambient temperature of 70 °C

Nom.

12.8 A

At 28 V and an ambient temperature of 70 °C

Overload characteristics

Continuous current

Output voltages > 13 Vdc (dependent on the input voltage), see fig. Output voltage over output current, typ.

Hiccup mode 1)

Output voltage < 13 Vdc (dependent on the input voltage), see fig. Output voltage over output current

Overload/
short circuit current

Max.

24 A

Continuous current, see fig. Output voltage to output current, typ.

Typ.

25 A

Peak current value in intermittent operation for typically 1 s
Load impedance 50 mOhm, see Fig. Output voltage over output current, typ.
The discharge current of the output capacitors is not included.

Max.

8.1 A

RMS value of the current in intermittent operation,
load impedance 50 mOhm, see fig. Output voltage to output current, typ.

Output capacity

Typ.

4,300 µF

Included in the power supply

Back-feeding loads

Max.

35 V

This power supply is stable and will not malfunction if a load is feeding back voltage to the power supply. It is irrelevant whether the power supply is switched on or off. The absorbent energy can be calculated according to the large built-in output capacitor.

1) Hiccup mode
In case of heavy overload (if the output voltage falls below 13 V) the power supply supplies output current for 3 to 4 seconds. Thereafter the output is switched off for about 7 seconds before a new switch-on attempt automatically takes place for a duration of 0.6 seconds. This cycle is repeated as long as the overload persists. After the overload has been rectified, the device will operate normally.

2) This is the maximum output voltage that can occur in the end position of the potentiometer in clockwise direction due to tolerances. It is not a guaranteed value that can be achieved.

3) Linear derating between +55 °C and 70 °C ambient temperature

Output 1:
Output voltage over output current, typ.; intermittent operation, short circuit at output