HS50_advance_level 2.pdf - 第61页
Stud ent Gu ide HS-5 0 Adva nced II 07/2 002 Ed ition 3 Power Supply 23 – all four flaps ove r the push-butt ons for rais ing and lo wering the c omponent ch angeov er tables must be clos ed. – the mini mum ope rating pr…
07/2002 Edition Student Guide HS-50 Advanced II
3 Power Supply
22
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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
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
Student Guide HS-50 Advanced II 07/2002 Edition
3 Power Supply
23
– 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.
07/2002 Edition Student Guide HS-50 Advanced II
3 Power Supply
24
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
YesNo
No
Yes
Yes
Yes
No
No