JOG EXCITE: Service & Maintenance Manual - rev. 1.1
Page 3.4
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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;
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it exchanges, over the RS-485 serial link to the display board, the error signals pertaining to
the tread belt and elevation motors;
>
it exchanges, over the RS-485 serial link to the display board, the commands for viewing
and configuring the inverter parameters;
>
it exchanges, over the RS-485 serial link to the display board, the commands for viewing
the errors logged by the inverter.
•
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
XU1
Power supply for the fans of the electrical box
+5 Vdc
XU1
Power supply for elevation motor encoder
+12 Vdc
XU2
Power supply for display
The board includes the following indicator LEDs:
LED name
Color
Description
H2 green
+5
Vdc
H3 green
+12
Vdc
H4 green
+24
Vdc
H5 red
400
Vdc
It contains:
•
The AT driver board
•
The AT power supply board
•
2 fans
•
A breaking resistor
3.1.8.1.
AT driver board
It is the upper board of the assembly and it is the heart of the driver: it does everything was
described above for the AT driver except the function of the AT power supply board described
below. In details:
•
It receives the line voltage and, through a PFC module, it rectifies the voltage to the 400 Vdc
used to generate the 3 phase voltage for the belt motor and to power up the AT power supply
board.
•
Internally it houses an inverter to control the belt motor;
•
Internally it houses a DC driver to control the elevation motor.
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