Manual EM-box 3
Hardware 3.1 - REV 3B - JAN 20
Page 13
3.3.1
AUX-Charging in (Wind, Solar..) (X1)
The EM-box offers 2 additional charging inputs for charging currents up to 40 A each (sum of both connections max.
60 A) for alternative energy sources like solar, wind or hydrogen generators.
To increase the current carrying capacity both inputs can be connected in parallel. When the overload is removed, the
fuses automatically reset themselves. The current measurement per input enables the charging current and its energy
yield to be displayed on the PSM system monitor.
Note:
The alternative energy sources such as solar, wind or hydrogen generators are simply connected to the EM-
box with their controllers. Unregulated charging sources with unacceptably high voltages for the EM-box
could destroy the EM-box.
3.3.2
Control lines Main switch (X2)
The battery main switches can be controlled remotely and are usually switched and displayed via the PSM system
monitor. In parallel, push-button switches can be used alternatively in any number for control. To display the switching
status of the main switches, an LED indicator light can be connected to the corresponding "LED" connector (see
connector X2).
The connection has an internal current limitation to 12-15 mA and allows the direct connection of a light emitting
diode with and without series resistor. We recommend the panel STC3 for this
purpose.
An additional push-button switch can be installed on the control column for an
emergency start from the cockpit to initiate an emergency start from the service
battery.
The switches are redundant to the CAN bus.
3.3.2.1 Control lines Sense (X2)
In order to use the full potential of the EM-box the alternator must have a sense input so that the EM-box can control
the alternator. This adapts the charging voltage to the battery requirements and extends it to an IUoU characteristic.
Two sense connections (LM1, 2) are available.
LM_Sense_1:
Connection Sense of alternator 1 (regulator)
LM_Sense_2:
Connection Sense of alternator 2 (regulator)
The sense connection of the alternator regulator is internally connected to the B+ output of the alternator on most
older LMs. This connection must be disconnected and separately led outside and connected to the sense connection
of the EM-box.
-
VolvoPenta, Nanni and Bukh engines with a 50A / 60A Valeo-LM (up to approx. 2006) have a yellow sense
cable already ex works.
-
VolvoPenta engines with a 115 A Mitsubishi-LM (from approx. 2004) have a sense connection already ex
works.
-
Yanmar engines with a 120 A Valeo-LM (from approx. 2015) have a sense connection ex works.
-
Modified alternators with Mastervolt alpha3 regulator (in preparation)
Alternators can usually be retrofitted, please contact us or ask your service company.
