00198661-02_UM_SX12-V3_EN.pdf - 第100页
2 Operational safety Instruction manual SIPLACE SX1/SX2 Edition V2 and V3 2.10 ESD guidelines From software version SC.713.1 Edition 12/202 0 100 2.10 ESD guidelines 2.10.1 What does ESD mean? Almost all o f the modules …
Instruction manual SIPLACE SX1/SX2 Edition V2 and V3 2 Operational safety
From software version SC.713.1 Edition 12/2020 2.9 Locking and attaching the warning labels
99
2.9.4 Responsibility and obligations
– It shall be the responsibility of the maintenance and service personnel to make sure this pro-
cedure is adhered to.
– It shall be the responsibility of the maintenance and service personnel’s immediate supervisor
to instruct his personnel on this procedure.
– It shall be the responsibility of the safety officer to manage the procedure for lockout and tag-
ging the placement machine.
2.9.5 Training
– The safety regulations require training for every individual. Of course, not every employee is
exposed to the same degree of danger or is involved with LO/TO as others are. So extensive
training is not necessary for everyone.
– To determine how much training to provide for each worker, the employees are divided into
three groups. Each group has its own level of training:
– Authorized employees.
– These workers actually install the locks and tags and do the preventive maintenance or
service work. So they must know the most about controlled energy. First, they must be
able to recognize all energy sources and measure the amount of energy. Authorized em-
ployees must look for energy sources out of the realm of the obvious. These energy
sources include electrical, mechanical, hydraulic, pneumatic, chemical, thermal and
gravitational. Once these workers can recognize all energy sources they must be taught
how to isolate, control, and release the energy without any risk.
– Affected employees
– These are workers who operate the placement machines or equipment that is to be de-
energized. Other employees who may be affected include those who work in an area that
contain equipment that may be locked/tagged out. These employees have to be in-
structed about the nature of the energy control program. They must know why lock/tag
out is important, what tags and locks look like and why they must not remove tags or
locks.
– All others
– As the name implies, any employee who is not affected or authorized fits into this cate-
gory. There employees include office personal, managers, and upper management. Al-
though they do not have a direct relationship to the machinery being locked or tagged,
they have to receive some training.
2 Operational safety Instruction manual SIPLACE SX1/SX2 Edition V2 and V3
2.10 ESD guidelines From software version SC.713.1 Edition 12/2020
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2.10 ESD guidelines
2.10.1 What does ESD mean?
Almost all of the modules in use today are equipped with highly integrated MOS blocks and com-
ponents. The manufacturing techniques used mean that these electronic components are ex-
tremely sensitive to overvoltage and thus to electrostatic discharge.
The abbreviation for such modules is 'ESD' (Electrostatic Sensitive Device). ’ESD’ is used inter-
nationally. The following symbol on cabinet typeplates, racks or packaging indicates that compo-
nents which are sensitive to electrostatic discharge have been used and that the modules
concerned are also touch-sensitive.
ESDs can be destroyed by voltages and power levels that are far below the level
that can be perceived by humans. Such voltages occur if a person touches a com-
ponent or module without earthing themselves. Components that are exposed to
such overvoltages do not generally appear to be defective immediately - incorrect
behavior starts after the component or module has been in operation for some time.
2.10.2 Important measures to protect against static charging
Most plastics can easily become charged and must therefore be kept away from at-risk com-
ponents.
Always ensure that people, the workplace and packaging are safely earthed when handling
electrostatic sensitive components.
2.10.3 Handling ESD modules
Do not touch electronic modules unless it is absolutely essential to do so in order to carry out other
work. If it is necessary, make sure that you do not touch the pins or printed conductors when you
pick up flat modules.
Do not touch components unless
you are constantly earthed by an ESD wrist strap or
you are wearing ESD shoes or ESD shoe earthing strips on an ESD floor.
Always discharge yourself before you touch an electronic module. To do this, simply touch a con-
ductive and earthed object immediately before you touch the module (such as unpainted parts of
a switch cabinet, a water pipe, etc.).
Do not allow modules with chargeable and highly insulating materials to touch one another, e.g.
plastic films, insulating table surfaces or items of clothing made from synthetic fibers.
Always place the modules on a conductive surface (table with an ESD coating, conductive ESD
foam, ESD bag or container).
Instruction manual SIPLACE SX1/SX2 Edition V2 and V3 2 Operational safety
From software version SC.713.1 Edition 12/2020 2.10 ESD guidelines
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Do not move the assemblies near to data view devices, monitors or television units. Keep a min-
imum distance of > 10 cm to monitors.
2.10.4 Measurements and modifications to ESD modules
Do not take measurements on the modules unless the following conditions are fulfilled:
– the measuring device is earthed (e.g. via PE conductors) or
– you discharge the measuring head just before taking measurements with a potential-free
measuring device (e.g. by touching an unpainted metal part of the controller casing).
Always use an earthed soldering iron if you carry out any soldering work.
2.10.5 Dispatching ESD modules
Always store modules and components in conductive packaging (e.g. metallized plastic bags
or metal sleeves) and dispatch them in conductive packaging.
If the packaging is not conductive, place the modules in a conductive envelope before pack-
aging. Use conductive expanded rubber, ESD bags, domestic aluminum foil or paper, for ex-
ample. NEVER use plastic bags or film.
2
If the module has integral batteries, ensure that the conductive packaging does not touch or
short-circuit the battery terminals and, if necessary, first cover the terminals with insulating
tape or material.