12
12V/12V-System without options
For a better understanding of how the system is programmed first read the Programming the system
steps on page 8. Otherwise the system may need to be reinstalled.
Read the notes for the mounting and wiring extension on page 11 before starting the installation.
Please read Instructions carefully prior to installation.
Choice of light blue connection
IGN
:
With alternators (smart alternators) that cut off charge temporarily, connect IGN wire to Car Ignition
(Terminal 15). When the alternator turns off, the DBM20A keeps charging until the Main voltage
drops below 11.9V or the alternator kicks in again.
With all other alternators do not connect the light blue (IGN), DBM20A stops charging when the
Main voltage drops below 12.7V. The DC/DC Charging automatically starts when Main voltage is
higher than 13.3V.
1.
If needed
connect the light blue IGN wire on Car Ignition (Terminal 15), otherwise leave
unconnected.
2. Connect all black GND wires.
3. Connect the red wire (+main) (
ATTENTION:
system is starting up -> refer to page 8
Programming
the system
).
(Continue installation only after System has switched to Stand-By mode)
4. Connect the blue wire (+aux)
last
.
New parallel operation 2 DBM20A
Two DBM20A can be operated in parallel, resulting in a maximum charging current of up to 45A. This
new function is only supported if no relay is installed in the system (no link start kit or no IBS-DBS dual
battery system with relay). Depending on the load behaviour, both systems work with full power, with
partial load or low power, a DBM20A, a "loading error" status display, can be deactivated. When more
charging power is required again, the deactivated DBM20A reactivates automatically again.
Notice
For a safe installation it is necessary to install the fuses in the red wire path (+ main: 30A) and in
the blue wire path (+ aux: 30A)!
