RUN EXCITE: Service & Maintenance Manual - rev. 1.5
Page 3.8
3.1.10. BELT MOTOR
An asynchronous three-phase motor which, by means of a pulley and poly-v belt, turns the driving
roller of the tread belt. Each motor phase is equipped with a normally-closed thermal cutout which
opens when the temperature exceeds a preset threshold, in order to safeguard the integrity of the
motor. The 3 thermal cutouts are connected in series and reach the inverter as a NC external input
signal. When this contact opens, the inverter generates an alarm.
It is equipped with a high inertia flywheel, to permit more gradual deceleration of the tread belt in
the event of a power outage or emergency stop.
ATTENTION: dangerous voltages are present at the motor and flywheel.
With the exception of the 500 model, the machine is equipped with an encoder that provides the
inverter with a feedback signal of the effective motor speed. This enables the inverter to effect
closed-loop speed control, by adjusting the frequency of the sinusoidal voltage driving the motor.
The tread belt motor has a power of 1.85 kW (2.5 hp).
3.1.11. POWER SUPPLY BOARD
Receives the mains voltage at its inputs and outputs the DC supply voltages for the machine circuit
boards listed below:
Supply voltage Connector Description
+24 Vdc XV1 or XV2 Power supply for fans electrical box
+5 Vdc
+12 Vdc
XU Power supply for display
+24 Vdc XU Power supply for Elevation + Cut-out Board
+ 5 Vdc XV5 Power supply for Download Board
Connector CN1 of this board is connected to 3 LEDs on the outside of the electrical box, which
indicate the presence of the output voltages:
LED name Color Description
LED 12V green
if ON indicates that the board is correctly
outputting the +12 Vdc supply
LED 5V green
if ON indicates that the board is correctly
outputting the +5 Vdc supply
LED 24V green
if ON indicates that the board is correctly
outputting the +24 Vdc supply
The power supply board employs voltage sensing to check the availability of the 5 Vdc supply to
the display. When this signal is 0, the board stops supplying the +5 Vdc.
3.1.12. DOWNLOAD BOARD
This board provides the interface between the inverter and the Digital Plan board. It performs the
following functions:
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