Front side and operating elements

Input terminals (screw terminals)

Designation (A)	Description
N	Mains input N
L	Mains input L
	PE input (protective conductor)

Output terminals (screw terminals, two contact pins per pole)

Designation (B)	Description
+	two identical positive poles, positive output
-	two identical negative poles, negative output

DC-OK relay contact (spring-loaded terminals)

Designation (C)	Description
13 / 14 make contact	The DC-OK relay contact is synchronized with the DC-OK LED See chapter on DC OK relay contact for more information.

Potentiometer for the output voltage

Designation (D)	Description
Potentiometer cover	Open the flap to adjust the output voltage. Factory setting: 48.0 V

Overload LED

Designation (E)	Description
LED red	On when the voltage at the output terminals is <90% of the set output voltage, or in the event of a short circuit in the output. Flashing, when the shut-down has been activated or the unit has switched off due to over-temperature. The input voltage is always required.

Designation (E)

Description

LED red

On when the voltage at the output terminals is <90% of the set output voltage, or in the event of a short circuit in the output.

Flashing, when the shut-down has been activated or the unit has switched off due to over-temperature.

The input voltage is always required.

DC OK LED

Designation (F)	Description
LED green	On when the voltage at the output terminals is >90% of the set output voltage.

Shutdown input

Designation (G)	Description
Shutdown input	Input for shutdown and remote control Enables the power supply to be switched off. Can be activated by a switch contact or external voltage. The remote control input allows the output voltage to be set between 44 V and 54 V. For details see chapters DC-OK relay contact and Shutdown input

Selector switch for "Parallel Use" / "Single Use" mode

Designation (H)	Description
Selector switch for "Parallel Use" / "Single Use" mode	Set the jumper to "Parallel Use" mode if power supplies are connected in parallel to increase the output power. In order to distribute the load current between the individual power supplies, "Parallel Use" mode regulates the output voltage so that the idle voltage is approx. 4% higher than at nominal load. See also chapter Parallel Use for power increase. A missing jumper corresponds to "Single Use" mode.

Designation (H)

Description

Selector switch for "Parallel Use" / "Single Use" mode

Set the jumper to "Parallel Use" mode if power supplies are connected in parallel to increase the output power. In order to distribute the load current between the individual power supplies, "Parallel Use" mode regulates the output voltage so that the idle voltage is approx. 4% higher than at nominal load. See also chapter Parallel Use for power increase. A missing jumper corresponds to "Single Use" mode.

LED displays	Overload LED	DC-OK LED	DC-OK contact
Normal mode	OFF	ON	Closed
During extra power	OFF	ON	Closed
Overload (Hiccup mode)	flashes	OFF	Open
Short circuit at output	flashes	OFF	Open
Temperature switch-off	flashes	OFF	Open
Shutdown input active	flashes	OFF	Open
No input power	OFF	OFF	Open