3
Series / parallel switch box installation manual
1.0.1 - 2018
When the thruster is not running: (see FIG.1)
The two batteries (battery banks) are connected in parallel so that the extra battery is being charged
by the boats normal 12V charge system, the same charge system that is charging the standard Batt.1.
By this, the extra battery (Batt.2) becomes a full part of the Batt.1 bank and thereby also increase the
capacity of this.
The box is built so that you can draw
the same amount current from the
extra Batt.2 as the thruster draws as
the solenoids have the same capacity
in their inactive position as in the ac-
tive position.(and basically nothing on
a boat draws as much as a thruster).
There is no power on the main positive
lead to the thruster until the thruster is
activated by the control panel.
The power to the thrusters control
system and panel is supplied by the
series/parallel switch box, via the grey
and black leads to the control side of
the thrusters solenoid only.
Both batteries are now at 0V - 12V
-
+
Batt.1
12V
SIDE- POW ER
M
24 VDC
-
+
Batt.2
12V
SIDEPOWER
Series / paralell switch box
+
To engine starter,
alternator,
charger etc.
-
When you run the thruster: (see FIG.2)
When a run signal is sent to the thruster from the panel, the solenoids in the series/parallel box re-
acts first so that Batt.2 is moved into a series connection with Batt.1. so that there is 24V on the main
power supply cable to the thruster.
The main contactors on the thrust-
er does not engage until this have
been done so that you have 24V at
the thruster to control the 24V main
solenoid contactors on the thruster.
Now, only Batt.1 is being charged
while Batt.2 can only draw from its
own capacity.
In this position, Batt.1 is 0 - 12V
and Batt.2 becomes the 12V -
24V portion of the 24V feed to the
thruster.
Batt.2 can only be connected to the
series/parallel switch box as de-
scribed in the manual.
-
+
Batt.1
12V
SIDE- POW ER
M
24 VDC
-
+
Batt.2
12V
SIDEPOWER
Series / paralell switch box
+
To engine starter,
alternator,
charger etc.
-
THIS IS NOT A WIRING DIAGRAM.
Only for functional illustration.