65
24 - Electrical System
Functional Description
The SC6000 machine is powered using six,
6-volt batteries connected in series, for a total
system nominal voltage of 36 volts To protect
the batteries from over discharge, the system
is protected with a 150 amp fuse
(F1)
located
on the battery positive main terminal All
connections are downstream from this main fuse
There is also a 10 amp resettable circuit breaker
protecting the main control board and all loads
downstream from the KSI relay
Adjacent to the circuit breaker is an Emergency Stop
(E-Stop) switch This is a normally closed switch
that opens when active (button depressed) The
E-stop switch is connected to both the main control
board and the drive controller The switch doesn’t
directly lock out any electrical circuit, but indicates
to the particular module that all applicable functions
should be inhibited
When the E-stop is activated, the machine ceases
all output functions without reset For example, the
vacuum motor and brush motors will immediately
be stopped, but the squeegee and deck lift actuators
will remain in the down position However, if the
machine is turned off in this E-stop condition, the
squeegee and deck will first be raised before the
machine fully powers down
Another protective device is the operator’s seat switch This is a normally
open switch that detects the operator’s weight in the seat and closes The
output of the seat switch is connected to both the main controller and the
drive controller When the switch is open, all drive functions are disabled
Unlike the E-stop switch, though, the seat switch does not disable most
other machine functions For example, the optional vac wand and wash hose
features are intended to be operated when the operator is not seated
The machine may be equipped with an optional onboard charger for
charging the batteries The charger is generally autonomous and is
connected directly to the batteries However, it also contains an interlock
feature to notify the Main Machine Controller that the charger is plugged in
to facility power When the charger is active, the Main Machine Controller
disables all functions of the machine to prevent damage to either the
machine or the charger
Bat+
Terminal
150 Amp
Fuse
10 Amp Circuit
Breaker
E-Stop
Switch
Seat
Switch
