HS50的结构及原理.pdf - 第38页
2 Operational Safety Adjustment Instructions SIPLACE HS-50 2.2 Safety Equipment E dition 05/00 38 6RFNHW VIRU&RPSRQHQW7 DEOHV,WHP LQ ILJ These soc kets are used to sup ply the ne cessar y voltages…
Adjustment Instructions SIPLACE HS-50 2 Operational Safety
Edition 05/00 2.2 Safety Equipment
37
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Å With the help of these switches you may check whether the protective covers and other covers
are closed.
– If the covers are closed, the safety contact is closed and the signalling contact is open. If you
open one of the covers, the safety circuit opens and the signalling circuit closes. The individual
components will either be activated or deactivated, depending on the position of the key switch
(Item 5).
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The protective contactor combination is contained in the power supply unit. It will not be activated
or deactivated if any safety - related functions should fail.
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NOTE
For normal mode the key switch remains open, i.e. in position "0".
The key has been drawn.
The protective contactor combination (PCC) trips if one of the protective covers is opened. The
link voltage (200 V) of the gantry axes will be switched off and the link voltage of the star axes
(100 V) will be reduced to 6 VDC. All modules are deactivated.
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WARNING
The protective covers must only be opened by appropriately qualified and trained personnel and
only when the key switch is closed (position "I").
The protective contactor combination (PCC) trips as soon as one of the protective covers is
opened. The link voltage of the gantries gets switched off and the link voltage of the star - axes
will be reduced to 6 VDC. The star of the placement head can be cycled at a lower speed if the
cover is open. The following modules:
– PCB clamping,
– PCB stopper,
– lifting table motors and
– tape cutting units
become deactivated.
2 Operational Safety Adjustment Instructions SIPLACE HS-50
2.2 Safety Equipment Edition 05/00
38
6RFNHW VIRU&RPSRQHQW7DEOHV,WHP LQILJ
These sockets are used to supply the necessary voltages as well as the compressed air to the
component tables. The terminals for the safety and signalling circuits are also integrated into these
sockets. This prevents the placement system being started up before the
component tables are docked to the system. If the component table is not connected, the
protective contactor combination will trip and deactivate all modules.
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With the help of these push buttons you may lift or lower the table bed of the component tables.
These push buttons can be activated only after you first moved the placement head out of the
range of the component table and opened the flap over the button. After changing the component
table, you must close the flap over the button again.
– If the flap is closed, the safety circuit contact will close and the signalling contact will open. The
machine is then ready for operation.
– If the flap is open, the safety circuit is interrupted and the signalling contact closes. An error
message will appear on the screen, prompting you to close the flap. The machine can then be
started again with the help of the START buttons.
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Both, the UPS as well as the station computer are located underneath the input conveyor.
WARNING
Always follow the safety instructions concerning potentially lethal voltages - even if the placement
system is switched off.
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The following contacts are connected in series and form the safety circuit:
– Make contacts for the four protective cover switches.
– Make contacts for the two PCB conveyor covers.
– Make contacts for the two EMERGENCY STOP buttons.
– Make contacts for the four component tables.
– Make contacts for the four flaps over the push buttons for lifting and lowering the component
tables.
Adjustment Instructions SIPLACE HS-50 2 Operational Safety
Edition 05/00 2.2 Safety Equipment
39
– Channels 2 and 3 of the protective contactor combination (PCC).
If the safety circuit is closed, 24 VDC are present at channels 2 and 3 of the PCC.
In addition to the power control LED, the two green LEDs for channels 2 and 3 are illuminated.
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The six signalling contacts for the covers are connected in parallel and form the "Cover signal"
circuit. If you open one or more covers, the contacts close - and the 24 V signal reaches the
CAN BUS signalling that one of the covers is open.
The two signalling contacts of the EMERGENCY STOP buttons are connected in parallel and form
the "EMERGENCY STOP button" circuit. If an EMERGENCY STOP button is activated, a
24 V signal is sent to the CAN BUS signalling that one of the EMERGENCY STOP buttons has
been pressed.
The four signalling contacts of 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 sent to the CAN BUS signalling that
one of the cover flaps is not closed.
The four signalling contacts of the component tables are connected in series and form the
"Component table signal" circuit. 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
operated:
– All four component tables must be docked on 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 buttons must be released.
– All four flaps over the push buttons for lifting and lowering the component tables must be
closed.
– The minimum operating pressure must have been reached.
– The software must have been enabled, and the safety circuit activated as a result.
– The power supply must be sending 24 V to the START buttons and the protective contactor
combination.
– If one of the START buttons will be activated then, the protective contactor combination (PCC)
will switch and activate the following components:
– The 200 V link voltage for the servo amplifier for the gantry axes.
– The 100 V link voltage for the star axes.