Manual EM-box 3
Hardware 3.1 - REV 3B - JAN 20
Page 8
2.5 Connection with two engines, two starter battery and one house battery (Power boat/Katamaran)
Figure 2.5 shows the installation for catamarans with two engines and two starter batteries.
The minus of the STB engine is connected to (-1). The STB starter (+) is connected to the charge output (+8) of the
EM-box via an additional remote controlled main switch FBC 265 to switch the starter on and off. The charging output
(B+) of the STB alternator is connected directly to (+1) of the EM-box.
Figure 2.5: Connection with two engines, two starter battery and one house battery (Power boat/Katamaran)
2.6 Charging sources
Charging always takes place even when the main switch is switched off and the EM-box is always active when
charging current is available. This applies to all charging devices connected to the charging terminals (+1, +2) and
AUX1, AUX2 (for solar / wind / hydrogen generator).
2.7 Battery charger
The charging output of the battery charger is connected directly to terminals (+1) and (-1) and can thus be identified in
the PSM's energy monitor as a charging source with its own charging current display.
2.8 Combi-Inverter
Comb inverters with outputs of up to 2 kW continuous output at 12 V are connected to the terminal (+7, -7), see also
the previous connection diagrams. When the combi inverter is in charge mode, the service battery and automatically
the starter and bow batteries are also charged by the EM-box.