RUN MED: Service & Maintenance Manual - rev. 1.0
Page 3.4
3.1.9. LIMIT SWITCH
This is a NC microswitch which defines the zero-reference position for the elevation mechanism:
the switch is positioned so that it is pressed by the machine during the reset procedure, thereby
defining the reference position.
3.1.10. AT DRIVER
This is the electronic device that acts as an interconnection hub for the main components of the
lower assembly, and serves as the point of connection with the display. In fact:
• Controls the motors:
> it exchanges, over the RS-485 serial link to the digital plan board, the commands for
controlling the tread belt and elevation motors;
> 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;
> it exchanges, over the RS-485 serial link to the digital plan board, the error signals
pertaining to the tread belt and elevation motors;
> it exchanges, over the RS-485 serial link to the digital plan board, the commands for
viewing and configuring the inverter parameters;
> it exchanges, over the RS-485 serial link to the digital plan 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 belt and elevation motor
encoders
+5 Vdc
+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
To Next Page
Loading...
