SPAZIO FORMA: Service & Maintenance manual - rev. 1.0
Page 3.11
3.4. SAFETY OF MOVING PARTS
3.4.1. CONTROLS
The power isolating board directly controls the power supply to the inverter, which in turn controls
the tread belt motor and the up-down motor.
This board receives an input signal from the emergency button and a trigger signal generated by the
CPU to denote its correct operation. If one of the two signals fails to arrive or is corrupted, the board
immediately shuts off the power supply to the two components which actuate the machine
movements, and sends an output signal to the CPU confirming the correct response to the
emergency request.
The power isolating board also filters the 5-12 Vdc voltages received from the power supply and
directed to the driver boards.
3.4.2. THE SIGNALS INVOLVED
The control logic involves the following signals:
• Emergency signal
This is the signal received from the emergency button, which the CPU board outputs (pins 3-5
of connector K16) to the power isolating board (pin 3-5 of connector J7). Under normal
operating conditions, the level of this signal is 0 Vdc, and it switches to 5 Vdc when the
emergency is activated.
Inverter
power supply
8-4/RELAY
Inverter
2-6/RELAY
Elevation
motor
power supply
1-2/J5
1-2/J6
Elevation
M
Power supply
Driver
board
6-7/J2
3-2/J2
CPU board
5-8/J2
3-5/K16
220 Vac
220 Vac
Safety switch
4-5/K16
Trigger
1-4/J2
3-5/J7
4-5/J7
3-4/J3
1-2/J3
2-5/J7
2-5/K16
L1-N
24 Vdc
5 Vdc
12 Vdc
Power isolating
board
Relay output
24 Vdc
5 Vdc
12 Vdc
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