JOG EXCITE: Service & Maintenance Manual - rev. 1.1
Page 3.5
The board includes the following indicator LEDs visible when the AT driver cover is removed:
LED name Colour Description
ALARM red
If ON indicates that the AT driver has detected
an error (EdC) when it was moving the elevation
motor. This LED stay ON for about 1 second and
then goes OFF.
EN_UP green
if ON indicates that the motor has received the
supply voltage for movement in the upward
direction
EN_DOWN red
if ON indicates that the motor has received the
supply voltage for movement in the downward
direction
TACHO
green functioning of elevation motor encoder: if
blinking, indicates that the board is receiving the
pulses from the encoder
DWN_SW
green status of Limit switch contact: if ON indicates
that the microswitch is pressed
3.1.8.2. AT power supply board
It is the lower board of the assembly and it receives the 400 Vdc from the AT driver board and
outputs to the AT driver board the low voltages used by the machine.
3.1.8.3. Fans
There are 2 fans powered with 24 Vdc used to cool down the AT driver.
3.1.8.4. Breaking resistor
It is a 150 Ohm used by the AT driver board to dissipate the energy produced by the motor when it
is working as a generator.
3.1.9. POWER SUPPLY BOX
It is a box that contains:
• Power entry socket;
• ON-OFF switch;
• 2 circuit breakers that check the overload on line and neutral;
• A filter board.
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