00900330-01_UM_ASM-ProcessLens_EN - 第41页
2 Safety 2.7 Lock out and tag out procedure Instruction manual ASM ProcessLens 03/2021 41 The following components still carry potentially lethal voltages even if the main power switch is switched off: ● Mains connection…
2 Safety
2.6 Residual voltages and discharge times in the machine
40 Instruction manual ASM ProcessLens 03/2021
2.5.3 Emergency stop loops and signaling circuit
2.5.3.1 Emergency stop loop structure
The following contacts are connected in series and form the emergency stop loop:
●
Make contact elements for the protective cover switch
●
Make contact elements for the emergency stop button
All the signaling contacts are closed when the machine is on standby. If a protective cover, for
example, is raised, the associated signaling contact opens and the safety interlock module re-
leased.
2.5.3.2 Description of the functions of the EMERGENCY STOP loops
The following conditions must be fulfilled in order to start and operate the machine:
●
The protective hood must be closed.
●
The emergency stop button must be released.
The machine is then ready for use.
2.6 Residual voltages and discharge times in the machine
2.6.1 Energy state of the machine after the EMERGENCY STOP button is pressed
If the EMERGENCY STOP button is pressed, the voltage are reduced to harmless residual
voltages in a very short time.
WARNING
Some parts of the system carry potentially lethal voltages
The machine is supplied with 1/N/PE ~ 240, 50/60 Hz mains voltage. This means that some
parts of the system carry potentially lethal voltages - even when switched off at the main
power switch. Incorrect handling of the machine can therefore result in death or severe in-
jury or considerable damage to equipment.
► Always follow the applicable accident prevention and safety regulations (particularly
DIN EN 60204, part 1 or IEC 60204, part 1) and the safety regulations in your own
country.
► The covers over the power supply unit may ONLY be opened by appropriately quali-
fied and trained personnel.
NOTICE
ASM ProcessLens electrical diagrams
For details, please refer to the ASM ProcessLens electrical diagrams.
2.6.2 Energy state of the machine after switching off the main power switch
WARNING
Some parts of the system carry potentially lethal voltages
The machine is supplied with 1/N/PE ~ 240, 50/60 Hz mains voltage. This means that some
parts of the system carry potentially lethal voltages - even when switched off at the main
power switch. Incorrect handling of the machine can therefore result in death or severe in-
jury or considerable damage to equipment.
► Always follow the applicable accident prevention and safety regulations (particularly
DIN EN 60204, part 1 or IEC 60204, part 1) and the safety regulations in your own
country.
2 Safety
2.7 Lock out and tag out procedure
Instruction manual ASM ProcessLens 03/2021 41
The following components still carry potentially lethal voltages even if the main power switch is
switched off:
●
Mains connection terminals of the main power switch.
NOTICE
ASM ProcessLens electrical diagrams
For details, please refer to the ASM ProcessLens electrical diagrams.
To avoid losing data, assess the following criteria before switching off your machine (apart from in
emergencies):
●
Has the machine finished transmitting machine and recipe data?
●
Has the machine finished processing the PCB?
●
Has the machine software completed the shot-down phase?
2.6.2.1 Machine switched off at the main power switch and disconnected
The machine is unpowered, apart from slight residual voltages in the power supply unit.
2.7 Lock out and tag out procedure
2.7.1 Purpose and scope
Before performing any preventive maintenance work or service work, a procedure of locking and
tagging must be followed. The procedure, when followed, correctly eliminates the possibility of an
employee being injured.
NOTICE
Additional safety measures
These procedures represent the minimum lock out/tag out requirements for the machine
during preventive maintenance work and service work. Any additional safeguards needed
to complete work safely can be specified by facilities supervision, the safety officer, the
safety committee and the health department.
2 Safety
2.7 Lock out and tag out procedure
42 Instruction manual ASM ProcessLens 03/2021
2.7.2 Description
Whenever it becomes necessary to isolate, control and release energy, the following procedure is
to be followed:
► Notify affected employees.
► Shut down the equipment. Carry out all normal stopping procedures:
– Press the Stop button,
(see fig. "Position of buttons and switches" [}36]).
– Switch off the ASM ProcessLens inspection software.
– Shut down the control computer.
– Switch the machine off at the main power switch (see fig. "Position of buttons and
switches" [}36]).
► Isolate the machine from all its energy sources:
– Disconnect the main power connection.
► Lock out the machine:
– Attach a lock whenever possible (e.g. to the main power switch).
NOTICE
Alternatively: Tag out procedure
If a machine can be locked out, it must be. However, there are situations where energy isol-
ating devices cannot accommodate locks. In these cases, the energy isolating devices
must be tagged to warn employees that the machine is de-energized for servicing. The tag
must be securely fastened, it must be placed in a position visible to all and it may only be
removed by the person who attached it.
► Release stored energy:
Stored energy in the electrical energy in electrolytic capacitors must be released by appro-
priate means.
– After switching off the machine, wait the specified discharge time (see sections 2.6 and
2.7), before the machine can be operated again without risk.
► Verify the lock out:
Testing the lock out can be done simply by pressing the start button.
► The following steps must be taken to restore the machine to operation:
– Check the area. Authorized employees should remove all of their tools and reinstall all
guards.
– Notify all affected employees.
– Before removing even one lock or tag, inform all workers in the area that the machine is
going to be restarted.
– Remove locks/tags
– Each authorized employee must remove his or her own lock. Each authorized employee
will have his or her own lock.
– Turn the machine on. Authorized workers should observe the equipment in operation to
ensure repairs were done correctly.
2.7.3 Testing
Service personnel may test the circuits by activating them briefly without canceling the locking
method. This may be done only when no other work is being performed by any other person on the
equipment being tested.
It is extremely important that all remote start switches be tagged with the Do Not Operate tag to
prevent inadvertent operation of the equipment during these periods.