Manual EM-box 3
Hardware 3.1 - REV 3B - JAN 20
Page 17
On this external shunt, the battery name must be configured to "EM-box-Bug" in order to be recognized as such by the
EM-box. The EM-box then detects this shunt and takes over the current, voltage and temperature values for the
battery management. The configuration of the battery capacity of the bug battery and all other parameters is then
done through the settings of the EM-box bug battery.
4.2 Setup Energy
In the Energy setup, the symbols for the individual shunts (current measurement) can be configured individually in
order to obtain a correct representation for the existing system. The factory setting is:
Shunt (+1): charging source Charger
Shunt (+2): charging source alternator
Shunt (+4): not active (possible: engine (starter) or alternator)
Shunt (+6): load1: Vehicle electrical system
Shunt (+7): load2: Inverter
Shunt (+8): not active (possible: charging current of the bow battery or with external shunt also the separate load
current of the bow battery)
Shunt (Aux1): Solar charging source
Shunt (Aux2): charging source wind / hydrogen generator
4.3 Setup battery switch
A PIN for switching the main switches can be activated in Setup. Further settings are not necessary.
4.4 Setup special function
Firmware Update EM-box
This function can be used to update the firmware of the EM-box. For this purpose a file named "mnc_vxyy" must be
created. (firmware version x.yy) to a micro SD card and inserted into the SD card holder of the PSM2.
Reset EM-box
Performs a warm start of the EM-box. Not normally required.
Solartrigger
If solar charge controllers (MPPT) are connected to the EM-box which only start with battery back voltage, the solar
trigger must be activated to start the solar charge. Thereby a voltage is cyclically applied to the inputs AUX1 and
AUX2 to activate the solar charge. As the solar trigger requires energy for the function, which is drawn from the
service battery (average 2 mA), this function should only be activated if necessary. The solar trigger period is preset to
300 s and the pulse duration to 15 s and can be adjusted if necessary. Various trigger modes are available for this
purpose:
1) Automatic
An attempt is made to start the solar controller with the internal supply voltage; if this voltage drops sharply due to the
load on the controller, the battery is switched on. The cycle time and the trigger time are adjustable.
2) Trigger high power
An attempt is made to start the controller by connecting the battery. The cycle time and the trigger time are adjustable.
3) Permanent low power
The solar input is continuously supplied with the internal supply voltage. This increases the power consumption of the
EM-box
4) Permanent high power
The solar input is continuously supplied with the battery voltage. This increases the power consumption of the EM-
box.
Charging Starter-Batterie (function not available)
During charging, the starter battery can be disconnected from the charge to prevent overcharging. In some engine
control systems this will result in an error message that the alternator has failed. To prevent this, this function can be
activated. This ensures that the starter battery is always charged.
