Output

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

The device 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 > 1 F are connected to the output, the device can charge the capacitor intermittently.

The device is equipped with a "Single Use / Parallel Use" function, which can be selected via the CoE data.
In Parallel Use, the output voltage at no load is regulated so that it is 4% higher than at nominal load. This achieves load sharing between power supplies connected in parallel.

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.	24 V
Adjustment range	Min.	24...28 V	Guaranteed value
Adjustment range	Max.	30.0 V	This is the maximum output voltage which can occur at the clockwise end position of the potentiometer due to tolerances. It is not guaranteed value which can be achieved.
Factory settings	Typ.	24.1 V	±0.2%, "single use" mode at full load and cold unit ±0.2% in "parallel use" mode at 20 A, with cold unit (23.9 V ±0.2% at 24 A and 25.1 V ±0.2% at no load)
Line regulation	Max.	10 mV	Between 85 and 300 Vac
Load regulation	Max.	100 mV	Between 0 and 24 A, static value, "single use"
Load regulation	Typ.	1000 mV	Between 0 and 20 A, static value, "parallel use", see Fig. Output voltage vs. output current (parallel use)
Ripple and noise voltage	Max.	50 mV_PP	Bandwidth 20 Hz to 20 MHz, 50 Ohm
Output current for Input voltage range 1	Nom.	24 A¹⁾	At 24 V and up to 45°C ambient temperature
	Nom.	20 A	At 24 V and up to 60°C ambient temperature
	Nom.	14.8 A	At 24 V and 70°C ambient temperature
	Nom.	20.6 A¹⁾	At 28 V and up to 45°C ambient temperature
	Nom.	17.1 A	At 28 V and up to 60°C ambient temperature
	Nom.	12.7 A	At 28 V and 70°C ambient temperature
	Linear derating between +60°C and +70°C (see chapter Environment)
Output current Input voltage range 2	Nom.	21 A¹⁾	At 24 V and up to 45°C ambient temperature
	Nom.	17.5 A	At 24 V and up to 60°C ambient temperature
	Nom.	13.1 A	At 24 V and 70°C ambient temperature
	Nom.	18 A¹⁾	At 28 V and up to 45°C ambient temperature
	Nom.	15.0 A	At 28 V and up to 60°C ambient temperature
	Nom.	11.3 A	At 28 V and 70°C ambient temperature
	Linear derating between +60°C and +70°C
¹⁾ This continuous power / current is permissible up to an ambient temperature of +45°C. It decreases linearly between 45 and 60°C up to the nominal power / nominal current s. chapter "Environment". Above +45°C, use this power / current for a maximum duty cycle of 10%, i.e. no more than 1 minute every 10 minutes.

Output 1: — Output voltage vs. output current (single use); output voltage vs. output current (parallel use)

Safety switch-off current	Typ.	60 A	Up to 12 ms once every five seconds, see Fig. Dynamic output current carrying capacity, typ. The fuse switch-off current is an increased transient current that contributes to the tripping of fuses on faulty output branches. The output voltage remains above 20 V.
Overload behavior		Continuous current	Output voltage > 13 Vdc, see fig. Output voltage vs. output current (single use)
Overload behavior		Hiccup mode²⁾	Output voltage < 13 Vdc, see fig. Output voltage vs. output current (single use)
Short-circuit current	Max.	29.8 A	Continuous current, see Fig. Output voltage vs. output current, typ.
	Typ.	29 A	Intermittent current peak value for typ. 2 s Load impedance 10 mOhm, see Fig. Short circuit at output, hiccup mode, typ. The discharge current of the output capacitors is not included.
	Max	9.8 A	RMS value of current, load impedance 10 mOhm, see Fig. Short circuit at output, hiccup mode, typ.
Output capacitance	Typ.	8500 μF	Included in the power supply
Load feedback	Max.	35 V	The device is resistant to load feedback and does not show malfunctioning when a load feeds back voltage to the power supply. It does not matter whether the power supply is switched on or off. The absorbed energy can be determined by means of the built-in large sized output capacitor.
²⁾ In the event of heavy overload (when the output voltage drops below 13 V), the power supply provides continuous output current for 2 s. The output is then switched off for about 18 seconds before a new switch-on attempt is automatically made. This cycle is repeated as long as the overload persists. After the overload has been rectified, the device will operate normally. See Fig. Short circuit at output, hiccup mode, typ.

Output 2: — Short circuit at output, hiccup mode, typ.; Dynamic output current capacity, typ.