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DP-M Series User's Manual

Version 12.11.2021

2.2 Safety Guidelines

Please follow the safety guidelines when using and putting the device into operation in order to prevent safety risks

and to ensure the correct operation of the product.

Before connecting the device to the local power supply, make sure that the device is switched off.

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Check if the product is compatible with the local power supply before connecting it.

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Be careful on the correct earthing of the device (PE connection)

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Do not use the product in humid environments

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Do not touch the output terminals of the product with unprotected hands while it is switched on.

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Do not use the device in extremely dusty rooms

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Do not use the device outside the parameters specified in the data sheet

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2.3 Unpacking and Examination

Our products are delivered carefully packed in cardboard boxes or in wooden crates, depending on place of

destination and the type of the device (dimensions, weight). We pay attention to the environmental compatibility of the

upholstery and packaging materials used and ask you to dispose the filling material correctly if present.

Please unpack the device and check the packaging as well as the product for transport damage. Should you notice

any damage to the packaging or the device, we ask you to log it with photos and inform us immediately.

ATTENTION: If the device has been delivered in a wooden box, please do not dispose it as it can be used for eventual

return transport for service procedures. Also the packaging material of smaller devices can be stored in order to be

used if necessary for a return transport.

3. Product Description

The DP-M power supply can operate in constant voltage (CV) or constant current (CC) mode within the rated output

range. This allows continuous switching between the modes in response to the load change.

In CV mode, a regulated output voltage is provided. The output voltage remains constant as the load increases while

the output current changes in response to the load changes, until the preset current limit is reached. At that point, the

output current becomes constant and the output voltage drops in proportion to the further increases in load. The

current mode is indicated on the front panel display.

Similarly in CC mode switching from CC to CV mode automatically occurs from a decrease of the load. A regulated

output current is provided. The output current remains constant as the load decreases while the output voltage

changes in response to the load changes.

3.1 Capacitive load

Note: Can be ignored for devices with optional passive reverse current protection.

In the basic version, power supplies of the DP-M series are not protected against reverse currents, which can lead to a

reverse current flowing from the capacitive load after switching off the output voltage of the power supply. Never

connect pre-charged capacities to the power supply unit unless you have connected a serial protection diode between

the load and the power supply. The protection diode is always recommended for operation with large capacities,

please pay attention to a correct dimensioning.

3.2 Pulse Load

Even if the peak current of the load is within the output power of the power supply, a high pulse load can cause

voltage fluctuations. To compensate these voltage fluctuations, expand your circuit by a serial induction. For low

currents, you can add a capacity in parallel for an even better result ( 1000uF / 1A).

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