RUN EXCITE: Service & Maintenance Manual - rev. 1.5
3.1.6. JOYSTICK
Only on the 900 models, there are 2 joysticks for adjusting the elevation and the speed. These
joysticks in fact send the Digital Plan Board the same signals produced by pressing the “+” and “-”
or “↑“ and “↓“ keys on the keyboard.
3.1.7. EMERGENCY SWITCH
This is the user safety device. It consists of 2 microswitches connected in series, which can be
tripped either by pressing the emergency button or by pulling a cord clipped to the garment of the
person exercising.
The emergency switch, which provides a NC contact, acts on both the Digital Plan Board and the
Elevation + Cut-out Board which uses it to control the relay that supplies power to the inverter.
When the emergency is tripped the relay removes the supply voltage from the inverter, causing the
tread belt and elevation motors to stop. The digital plan board also detects tripping of the
emergency switch, upon which it interrupts the exercise and shows the “EMERGENCY STOP”
message on the display.
To resume normal machine operation, it is necessary to press the “Clear” button.
3.1.8. RELAY
This is a power relay with NC contact, which disconnects the supply voltage to the inverter. Its coil
is energized, thereby closing the relay and powering the inverter, when the emergency switch is
also providing a NC contact.
3.1.9. INVERTER
This is the heart of the electrical box: it acts as an interconnection hub for the main components of
the electrical box, and serves as the point of connection with the display. In fact:
• It supplies the tread belt motor with a variable-frequency sinusoidal voltage: varying the
frequency varies the speed of rotation of the motor, and consequently the speed of the tread belt;
• Exchanges, over the RS-485 serial link to the Digital Plan Board and via the Download Board,
the commands for controlling the tread belt and elevation motors;
• Exchanges, over the RS-485 serial link to the Digital Plan Board and via the Download Board,
the error signals pertaining to the tread belt and elevation motors;
• Exchanges, over the RS-485 link to the Digital Plan Board and via the Download Board, the
commands for viewing and configuring the inverter parameters;
• Exchanges, over the RS-485 link to the Digital Plan Board and via the Download Board, the
commands for viewing the errors logged by the inverter.
The inverter power supply is disconnected by a relay with NC contact that opens and removes the
supply voltage when the emergency switch is tripped. This also removes the power supply from the
tread belt and elevation motors.
The inverter has a power rating of 2.2 kW (3 hp).
ATTENTION: dangerous voltages are present at the inverter.
Page 3.7
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