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 > 3F are connected to the output, the device can charge the capacitor intermittently.
The output is electronically protected against overload, no-load and short circuit. In the event of a protection event, audible noises may occur.
Output voltage | Nom. | 24V |
|
Adjustment range | Min. | 24-28V | Guaranteed value |
Max. | 30V | 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. | |
Factory settings | typ. | 24.1V | ±0.2%, at full load (cold device) |
Line regulation | Max. | 10mV | Between 90 and 300Vac |
Load regulation | Max. | 100mV | Between 0 and 20A, static value, see Fig. Output voltage over output current, typ. |
Residual ripple and ripple voltage | Max. | 100mVss | Bandwidth 20 Hz to 20 MHz, 50 Ohm |
Output current 1) | Nom. | 20A | At 24V and an ambient temperature below 55°C, see Fig. Output current over ambient temperature |
Nom. | 12.5A | At 24V and 70°C ambient temperature, see Fig. Output voltage over output current, typ. | |
Nom. | 17.1A | At 28V and an ambient temperature below 55°C, see Fig. Output current over ambient temperature | |
Nom. | 10.7A | At 28V and 70°C ambient temperature, see Fig. Output voltage over output current, typ. | |
Overload characteristics |
| Continuous current | Output voltage > 13Vdc, see Fig. Output voltage over output current, typ. |
| Hiccup mode2) | Output voltage < 13Vdc, see Fig. Output voltage over output current, typ. | |
Overload/short circuit current | Max. | 27.5A | Continuous current, see Fig. Short-circuit at output, typ. |
typ. | 30A | Intermittent current peak value for typ. 1s | |
Max. | 11A | intermittent mean current value (rms.) | |
Output capacity | typ. | 6,800μF | Included in the power supply |
Load feedback | Max. | 35V | The device is robust and will not indicate a malfunction if a load voltage is fed back into the power supply. It does not matter whether the power supply is switched on or off. The absorbed energy can be calculated by means of the built-in large-size output capacitor. |
1) Linear derating between +55°C and +70° |
2) In case of severe overload (when the output voltage drops below 13V) the power supply delivers a continuous output current for 2-5 seconds. The output is then switched off for approx. 7 second before a new start attempt is automatically made for 1 second. This cycle is repeated as long as the overload exists. The device starts operating normally again once the overload has been rectified. |
