38 Installation instructions / ACS-2 plus
The end-of-charging voltage of the battery charging unit is correctly set in the factory for Sonnenschein
batterys of the A500 series.
If it is necessary to change the setting, proceed as described in the chapter "Adjusting the end-of-charging
voltage".
Adjusting the end-of-charging voltage
1. The power supply must have reached the operating temperature. This requires the power supply to
be switched on for at least two hours with rated load and closed housing.
2. Connect the charged battery.
An incompletely charged battery causes an incorrect adjustment!
3. Adjust the voltage at the battery terminals or at MP1 and MP2 by means of the PO1 potentiometer
under consideration of the ambient temperature according to the table below.
Make sure of the battery type!
Warning! Destruction of device possible!
Ensure that only the PO4 potentiometer is adjusted...
1. After having measured the temperature
2. If the battery voltage deviates by >200mV from the nominal value, then adjust PO4 accordingly.
Determination of the current consumption when the power is on (example):
The ACS-2 plus controls two doors.
Component Current consumption Comment
CPU 200 mA Including alarm relay and tamper relay, because these are normally
activated.
Interface 200 mA RS485 interface with potential seperation
Reader (2x) 140 mA Two contactless readers each 70mA
Door strike (2x) 460 mA Novar door strike with direct current load function
Total 1000 mA
Larger actuators (e.g., door strikes) or devices with higher current consumption cannot be
supplied.
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