Connection of the MSU120 Solar power supply

Battery connection to terminals.

The source output has a common negative pole and two terminals with a positive output voltage which are internally disconnected according to the state of the accumulator to prevent deep discharge, or overcharging.

Auxiliary source output – not disconnected from the battery upon a drop in its voltage. Where necessary this can also be used as an input of another charging current (e.g. from the MS2000 network charger).

	Warning
	Output AUX.OUT/CHG is not protected with a current protection fuse.

Outputs with open collector with a common negative pole. The external voltage connected to these terminals cannot exceed the voltage at the output DC_OUT! Output switching is indicated by an LED lighting above the respective output.

By default:

The serial port of the power supply is wired to a D-SUB connector (description of terminal like a DCE end device):

The fuse on the front panel is connected into the battery circuit – it protects the battery and power supply against fault conditions whilst discharging and charging. In addition the source is protected by an electronic fuse which disconnects the source output (DC_OUT) if the source output current exceeds 6 A. After disconnecting the output as a result of overloading the power supply tries to connect the output every 20 s whilst testing whether any conditions for disconnecting the output still exist.

By pressing the START button the battery connection to the source output is left disconnected. However, if conditions for output disconnection persist this condition is automatically reversed (immediately in the case of overloading, and no later than within 2 minutes in the case of a low battery voltage).

Terminals for connecting an external temperature sensor. The sensor should be positioned, where possible, on the case of the charging accumulator. If installed with the accumulator simply connect the sensor to the power supply terminals. A KTY10 (2000 Ω/25 °C) temperature sensor is used.

	Warning
	The terminals cannot be connected through to other power supply terminals !!!

Temperature sensor characteristic: