JOG NOW : Service & maintenance manual - rev. 6.2
Page 3.15
3.22.1.
AT-UL
DRIVER
It’s the 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:
it exchanges, over the RS-485 serial link to the CPU/ARM 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 supplies the elevation motor with a 24Vdc;
it exchanges, over the RS-485 serial link to the CPU/ARM board, the error signals pertaining
to the tread belt and elevation motors;
it exchanges, over the RS-485 serial link to the CPU/ARM board, the commands for viewing
and configuring the inverter parameters;
it exchanges, over the RS-485 serial link to the CPU/ARM 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
+24Vdc
XU1
Power supply for the fans of the electrical box
+5Vdc
XU1
Power supply for belt and elevation motor encoders
+5Vdc
+12Vdc
XU2
Power supply for display
From the outside the following indicator LEDs are visible:
LED name
Colour
Description
H2
GREEN
+5Vdc
H3
GREEN
+12Vdc
H4
GREEN
+24Vdc
H5
RED
400Vdc
It contains:
The AT driver board
The AT power supply board
2 fans
A breaking resistor
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