Archive – Ransburg 9040 Classic HV Power Supply 76447 User Manual

Page 22

CP-97-02.5

9040 Classic for REA & M90 Systems - Operation

1 9

High V

High Voltage Adjustment Knob

oltage Adjustment Knob

The high voltage adjustment knob allows infinite
control of the spray applicator electrode voltage
between 0 and rated kV.

Overload Indicator/Reset Button

Lighting of the yellow overload/reset lamp indicates
that an overload condition has occurred. The
overload circuitry is integral to the power supply
and is factory calibrated and sealed. It allows
normal operation, testing, and maintenance. It will
only activate if the spray applicator current exceeds
the preset limit as a result of component (barrel,
transformer, cable) failure or improper applicator
to target distance. If the overload should trip,
locate and correct the problem. Then reset the
overload by pushing the reset switch in, or turning
the ON/OFF switch OFF and back ON again.

The overload feature can be turned ON or OFF by
moving jumper JP5 on the main PC Board (see
Figure 7, in the "Maintenance" section of this
manual, for location of JP5). To turn the overload
circuit OFF, position jumper JP5 so that it covers
(shorts) pins 1 and 2. To turn the overload circuit
ON, position jumper JP5 so that it covers (shorts)
pins 2 and 3.

When turning the overload circuit ON for applicator
units it may be necessary to adjust the setpoint at
which overload occurs. If so, contact your
authorized ITW Ransburg representative for
assistance.

High V

High Voltage Safety Circuit

oltage Safety Circuit

The 9040 Printed Circuit Board (PCB) contains a
safety circuit that prevents high voltage from being
present at the applicator if the high voltage trigger
device (flow switch, pressure switch, PC contact,
etc.) has not been triggered. If a failure mode
should occur that would attempt to send high
voltage to the applicator, even though the high
voltage trigger has not been activated, the PC
board will shut down and enter an overload
condition. If repeated overloads occur, every time
the overload reset button is pushed, open the
cabinet door and see if the red LED (LED1, see
Figure 7, in the "Maintenance" section of this
manual for location) on the PC Board lights for
about 2 seconds after pushing the reset button. If
it does, the PC Board has failed and should be
replaced.

High V

High Voltage ON Indicator

oltage ON Indicator

The red high voltage on LED will light when high
voltage is present at the spray applicator.

AC Power ON Indicator

The green AC power ON LED will light when the
AC Power ON/OFF switch is in the ON position.

Power supplies for applicators are

shipped from the factory with the overload
circuit OFF, while those for automatic appli-
cators are shipped with the overload circuit
ON. This is because during normal use,
manually operated applicators may come in
close proximity to the part, causing an over-
load which requires the operator to cease
the painting operation while going to reset
the overload. In addition, the operator will
notice when a failed part may be causing
the spray applicator to operate at less than
optimum performance, thus the overload
circuit is not necessary for this purpose.
Automatic applicators, however, typically
have a fixed distance between electrode
and target and

("Note" continued in next column)

N O T E

thus it is not likely that the spray applicator
would come into close proximity with the
part during normal use. If it should, then it is
desired that an overload occur to alert main-
tenance so that the condition can be cor-
rected. Additionally, since there is no opera-
tor with automatic applicators, the overload
circuit is required to alert maintenance when
failed parts may be causing the spray appli-
cator to operate at less than optimum perfor-
mance.

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