Manual EM-box 3
Hardware 3.1 - REV 3B - JAN 20
Page 15
3.4 Battery disconnect switch
Disconnect switch Starter-Battery (A)
The main switch of the starter battery disconnects or closes the connection of the
starter battery to 2 (starter motor). Electrical operation is via the system
monitor or a pushbutton (see 3.3.2 Main switch control lines). The associated status
LED indicates the switching status.
In emergencies, the main switch can be switched on and off mechanically at the two
upper buttons.
The left key switches the main switch off mechanically and the
right key switches the main switch on mechanically
.
Disconnect switch emergency start (B)
The main switch "emergency start" disconnects or closes the connection of the
service battery to 2 (starter motor). Electrical operation is via the system
monitor or a pushbutton (see 3.3.2 Main switch control line). The corresponding
status LED indicates the switching status.
During electrical actuation, the starter output is switched from the starter battery to
the consumer battery.
In emergencies, the main switch can be switched on and off mechanically at the two
middle buttons.
The right button mechanically switches the emergency start off,
and the left button switches the emergency start on
Disconnect switch House-Battery (C)
The main switch of the service battery disconnects or closes the connection of the
service battery to the o6, +7 (consumer). Electrical operation is via the
system monitor or a button (see 3.3.2 Main switch control line). The corresponding
status LED indicates the switching status.
In emergencies, the main switch can be switched on and off mechanically at the two
lower buttons.
The left key switches the main switch off mechanically and the
right key switches the main switch on mechanically
.
In "normal operation" the main switches (A) and (C) are switched ON (indicator light is on) and the main switch (B)
"emergency start" is switched OFF (indicator light is off).
In "emergency operation" i.e. for an emergency start of the machine with empty or defective starter battery with the aid
of the service batteries, the main switch (A) is switched OFF (indicator light is off) and the main switch (B) "emergency
start" is switched ON (indicator light is on). This means that the engine is supplied by the service battery. After the
engine has been switched off, it is possible to switch back to normal operation. The batteries are always charged by
the alternator regardless of the switch position!
Attention
:
Manual operation of the button is not indicated by the status LED. Therefore the actual switching state deviates from
the display.
After manually switching on the main switches, electrical operation via the system monitor or external push buttons
must be carried out subsequently in order to synchronise the display and ensure 100% contact with the relay before
high continuous currents (> 50 A) flow. A short-term high current (5 sec.) is however possible.