Wachendorff OPUS A3, Operating Manual, Page: 27 / 36

Getting Started
Seite 23 von 32
Please keep all the connectors separated. All connection should be done on the
shortest distance to the unit.
4.3.1 Unused plugs
ACHTUN
4.3.2 Power Supply
The unit may be used with the 12 V and for 24 Volt battery systems, operating
voltage range of 8-36 VDC. The overvoltage resistance is about 48V for 2 minutes.
Inverse-polarity protection is up to -48 V DC.
Car ground (pin no. 4 on main connector) has to be connected to the chassis by a
conductor as short as possible. Even if there is no conductive chassis available (eg.
in E-vehicles) the pin has to be connected to the negative pole of the battery.
Otherwise there will be no protection against over voltage, shot cut or ESD.
4.4 First steps
Plug the main connector into the OPUS A3. Then connect the pins 15 and 30 for the
plus voltage, as well as pins for GND and CarGND for the ground. Switch on the
Power supply.
On start the boot-logo image will be displayed on the screen. This may be
exchanged with the customer specific image (please refer to
C/C++ Developer
Guide for more information).
Penetrating humidity by unused and unprotected plugs may
cause damage of the unit. Please protect unused plugs with the
special blind inserts that have been supplied with the units.
Th Wrong connection may cause damage of the unit.
The ECU must be the component in charge of all safety related
functions.