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2 Operational Safety User Manual HS-50 2.2 Safety equipment Software-Version 5.01 Edition 01/99 68 in parallel and form the "E mergenc y sto p mus hroom-h ead push- button signal" circ uit. When a n emergenc y …
User Manual HS-50 2 Operational Safety
Software-Version 5.01Edition 01/99 2.2 Safety equipment
67
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To use this push-button, and thus the drives for the component table, you must first move the pla-
cement head out of the range of the component table and open the flap over the button. After
changing the component table, you must close the flap over the button once more.
– If the flap is closed, the safety circuit contact will close and the signalling contact will open. The
machine is then ready for use.
– If the flap is open, the safety circuit is interrupted and the signalling contact closes. An error
message will appear on screen, prompting you to close the flap. The machine can then be re-
started using the Start buttons.
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Both the UPS and the station computer are housed beneath the input conveyor.
WARNING Always follow the safety instructions concerning potentially lethal volta-
ges - even when the placement system is switched off.
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The following contacts are connected in series and form the safety circuit loop:
– make contacts for the four protective cover switches
– make contacts for the two PCB conveyor covers
– make contacts for the two emergency stop mushroom-head push-buttons
– make contacts for the four component tables
– make contacts for the four flaps over the push-buttons for raising and lowering the component
tables
– channels 2 and 3 of the protective contactor combination (PCC)
If the safety loop is closed, 24 VDC is present at channels 2 and 3 of the PCC. The two green
LEDs for channels 2 and 3 light up in addition to the green power ON LED.
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The six signalling contacts for the covers are connected in parallel and form the "Cover signal"
circuit. If one or more covers are opened, the contacts close - the 24 V signal reaches the CAN
bus and signals that one of the covers is open.
The two signalling contacts for the emergency stop mushroom-head push-button are connected
2 Operational Safety User Manual HS-50
2.2 Safety equipment Software-Version 5.01 Edition 01/99
68
in parallel and form the "Emergency stop mushroom-head push-button signal" circuit. When an
emergency stop mushroom-head push-button is pressed, a 24 V signal is sent to the CAN bus
and signals that one of the emergency stop mushroom-head push-buttons has been pressed.
The four signalling contacts for the push-button flaps are connected in parallel. They form the
"Flaps signal" circuit. If one or more flaps is raised, a 24 V signal is applied to the CAN bus and
signals that one of the cover flaps is not closed.
The four signalling contacts for the component tables are connected in series and form the "Com-
ponent table signal" loop. If a component table is missing, a 0 V signal is sent to the CAN bus. If
all the tables are connected, the signal is approximately 16 V.
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The following conditions must be fulfilled before the placement system can be started or oper-
ated:
– all four component changeover tables must be docked and connected.
– all covers - four over the gantries, one over the PCB input belt and one over the output belt -
must be closed.
– both emergency stop mushroom-head push-buttons must be released
– all four flaps over the push-buttons for raising and lowering the component changeover tables
must be closed.
– the minimum operating pressure must have been reached.
– the software enable must have been given, thus activating the safety circuit.
– the power supply must be sending 24 V to the Start buttons and the protective contactor com-
bination.
– If one of the Start buttons is now pressed, the protective contactor combination (PCC) will
switch and activate the following components:
– 200 V link voltage for the servo amplifier for the gantry axes
– 100 V link voltage for the star axes
– 230 V operating voltage for the lifting table motors
– the servo unit will receive a "Servo enable" signal for the servo amplifier
– 34 V operating voltage is switched to the component changeover tables
– 24 V operating voltage is switched to the used tape cutters.
The machine is now ready for service.
User Manual HS-50 2 Operational Safety
Software-Version 5.01Edition 01/99 2.2 Safety equipment
69
PCC*)
y axis
x axis
star axis
dp axis
z axis
PCB conveyor
PCB clamping
Width adjustment
PCB stopper
Lifting table
Used tape cutter
Active
Yes
Voltage
200V
200V
100V
30V
30V
Active
Yes
Yes
Yes
Yes
Yes
Yes
PCC*)
y axis
x axis
star axis
dp axis
z axis
PCB conveyor
PCB clamping
Width adjustment
PCB stopper
Lifting table
Used tape cutter
Active
No
Voltage
0V
0V
6V
30V
30V
Active
Yes
No
Yes
No
No
No
PCC*)
y axis
x axis
star axis
dp axis
z axis
PCB conveyor
PCB clamping
Width adjustment
PCB stopper
Lifting table
Used tape cutter
Active
No
Voltage
0V
0V
6V
30V
30V
Active
No
No
No
No
No
No
*) PCC Protective contactor combination
Startbutton pressed
Compressed air
min. 5.0 bar?
Emerg.stop button
pressed?
Component table safety
circuit interrupted?
Protective cover open?
Key switch
closed (position “I”)?
Yes No
Yes
No
No
Yes
Yes
Yes
No
No